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Operations of Symbol table – The basic operations defined on a symbol table include:įollowing are commonly used data structure for implementing symbol table :.
#Symbol table in compiler design code
Target Code generation: Generates code by using address information of identifier present in the table.Code Optimization: Uses information present in symbol table for machine dependent optimization.Intermediate Code generation: Refers symbol table for knowing how much and what type of run-time is allocated and table helps in adding temporary variable information.
#Symbol table in compiler design update
to verify that expressions and assignments are semantically correct(type checking) and update it accordingly. Semantic Analysis: Uses available information in the table to check for semantics i.e.
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Syntax Analysis: Adds information regarding attribute type, scope, dimension, line of reference, use, etc in the table.Lexical Analysis: Creates new table entries in the table, example like entries about token.It is used by various phases of compiler as follows :.It is used by compiler to achieve compile time efficiency.The information is collected by the analysis phases of compiler and is used by synthesis phases of compiler to generate code.It is built in lexical and syntax analysis phases.it stores information about scope and binding information about names, information about instances of various entities such as variable and function names, classes, objects, etc. Symbol Table is an important data structure created and maintained by the compiler in order to keep track of semantics of variable i.e.