انت هنا الان : شبكة جامعة بابل > موقع الكلية > نظام التعليم الالكتروني > مشاهدة المحاضرة
الكلية كلية العلوم للبنات
القسم قسم الحاسبات
المرحلة 3
أستاذ المادة اسراء هادي عبيد السلطاني
04/06/2018 07:59:18
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
Syntax-Directed Translation
Syntax-directed translation is done by attaching rules or program fragments to productions in a grammar.
• Values of these attributes are evaluated by the semantic rules
associated with the production rules.
• Evaluation of these semantic rules:
– may generate intermediate codes
– may put information into the symbol table
– may perform type checking
– may issue error messages
– may perform some other activities
• An attribute may hold almost anything.
– a string, a number, a memory location, a complex record.
Syntax-Directed Definitions and Translation Schemes
When we associate semantic rules with productions, we use two
notations:
– Syntax-Directed Definitions
– Translation Schemes
• Syntax-Directed Definitions:
– give high-level specifications for translations
– hide many implementation details such as order of evaluation of semantic actions.
– We associate a production rule with a set of semantic actions, and we do not say when they will be evaluated.
• Translation Schemes:
– indicate the order of evaluation of semantic actions associated with a production rule.
– In other words, translation schemes give a little bit information about implementation details.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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