edu.jmu.decaf

Class BuildSymbolTables

java.lang.Object

edu.jmu.decaf.DefaultASTVisitor

edu.jmu.decaf.StaticAnalysis

edu.jmu.decaf.BuildSymbolTables

All Implemented Interfaces:

ASTVisitor

public class BuildSymbolTables
extends StaticAnalysis

Static analysis pass to construct symbol tables. Visits an AST, maintaining a stack of active symbol tables and annotating various AST nodes with the appropriate symbol tables.

Constructor Summary

Constructors

Constructor and Description
BuildSymbolTables()

Method Summary

Modifier and Type	Method and Description
void	finalizeScope() Pop the stack and move outwards one scope level.
SymbolTable	getCurrentTable() Return the innermost active symbol table.
SymbolTable	initializeScope() Create a new innermost symbol table scope and push it on the stack.
void	insertFunctionSymbol(ASTFunction node) Add a symbol for the given function to the current (innermost) scope.
void	insertParamSymbol(ASTFunction.Parameter p) Add a symbol for the given function parameter to the current (innermost) scope.
void	insertPrintFunctionSymbol(String name, ASTNode.DataType type) Add a symbol for a hard-coded function to the current (innermost) scope.
void	insertVariableSymbol(ASTVariable node) Add a symbol for the given variable to the current (innermost) scope.
void	postVisit(ASTBlock node)
void	postVisit(ASTFunction node)
void	postVisit(ASTProgram node)
void	preVisit(ASTBlock node)
void	preVisit(ASTFunction node)
void	preVisit(ASTProgram node)
void	preVisit(ASTVariable node)

Methods inherited from class edu.jmu.decaf.StaticAnalysis

addError, addError, getErrors, getErrorString, resetErrors

Methods inherited from class edu.jmu.decaf.DefaultASTVisitor

defaultInVisit, defaultPostVisit, defaultPreVisit, inVisit, postVisit, postVisit, postVisit, postVisit, postVisit, postVisit, postVisit, postVisit, postVisit, postVisit, postVisit, postVisit, postVisit, preVisit, preVisit, preVisit, preVisit, preVisit, preVisit, preVisit, preVisit, preVisit, preVisit, preVisit, preVisit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BuildSymbolTables

public BuildSymbolTables()

Method Detail

getCurrentTable

public SymbolTable getCurrentTable()

Return the innermost active symbol table.

Returns:

Innermost active symbol table

initializeScope

public SymbolTable initializeScope()

Create a new innermost symbol table scope and push it on the stack.

Returns:

New innermost active symbol table

finalizeScope

public void finalizeScope()

Pop the stack and move outwards one scope level.

insertFunctionSymbol

public void insertFunctionSymbol(ASTFunction node)

Add a symbol for the given function to the current (innermost) scope.

Parameters:

node - Function to add

insertVariableSymbol

public void insertVariableSymbol(ASTVariable node)

Add a symbol for the given variable to the current (innermost) scope.

Parameters:

node - Variable to add

insertParamSymbol

public void insertParamSymbol(ASTFunction.Parameter p)

Add a symbol for the given function parameter to the current (innermost) scope.

Parameters:

p - Parameter to add

insertPrintFunctionSymbol

public void insertPrintFunctionSymbol(String name,
                                      ASTNode.DataType type)

Add a symbol for a hard-coded function to the current (innermost) scope. Uses the given function name; the function will take one parameter of the given type and return void.

Parameters:

name - Function name

type - Function argument type

preVisit

public void preVisit(ASTProgram node)

Specified by:

preVisit in interface ASTVisitor

Overrides:

preVisit in class DefaultASTVisitor

postVisit

public void postVisit(ASTProgram node)

Specified by:

postVisit in interface ASTVisitor

Overrides:

postVisit in class DefaultASTVisitor

preVisit

public void preVisit(ASTFunction node)

Specified by:

preVisit in interface ASTVisitor

Overrides:

preVisit in class DefaultASTVisitor

postVisit

public void postVisit(ASTFunction node)

Specified by:

postVisit in interface ASTVisitor

Overrides:

postVisit in class DefaultASTVisitor

preVisit

public void preVisit(ASTBlock node)

Specified by:

preVisit in interface ASTVisitor

Overrides:

preVisit in class DefaultASTVisitor

postVisit

public void postVisit(ASTBlock node)

Specified by:

postVisit in interface ASTVisitor

Overrides:

postVisit in class DefaultASTVisitor

preVisit

public void preVisit(ASTVariable node)

Specified by:

preVisit in interface ASTVisitor

Overrides:

preVisit in class DefaultASTVisitor