Class VarDeclNode

Object
  ASTNode
      DeclNode
          VarDeclNode

public class VarDeclNode
extends DeclNode

An AST node representing a variable declaration: "id : type;" or "id : ARRAY (INT DOTDOT INT) OF type;".

Nested Class Summary

Nested classes/interfaces inherited from class ASTNode

ASTNode.Opcode

Field Summary

Fields inherited from class DeclNode

enclosingProc

Constructor Summary

VarDeclNode(IdNode id, Type.BaseType type)
Creates a new VarDeclNode for a scalar declaration.

VarDeclNode(IdNode id, Type.BaseType type, int lower, int upper)
Creates a new VarDeclNode for an array declaration.

Method Summary

void	codeGen(StmtNode loop) Generates code for this node and all descendants.
void	resolveNames(SymbolTable symtab) Resolves all applied uses of identifiers in the tree rooted at this node.
void	resolveTypes(ProcDeclNode proc) Fills in types for all Symbols bound to IdNodes.
void	unparse(PrintWriter p, int level) Prints a source representation of the tree rooted at this node on output stream p.

Methods inherited from class ASTNode

indent, toString

Methods inherited from class Object

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

Constructor Detail

VarDeclNode

public VarDeclNode(IdNode id,
                   Type.BaseType type,
                   int lower,
                   int upper)

Creates a new VarDeclNode for an array declaration.

Parameters:

id - the name of the variable.

type - the type appearing in the declaration.

lower - the lower bound in the declaration.

upper - the upper bound in the declaration.

VarDeclNode

public VarDeclNode(IdNode id,
                   Type.BaseType type)

Creates a new VarDeclNode for a scalar declaration.

Parameters:

id - the name of the variable.

type - the type appearing in the declaration.

Method Detail

unparse

public void unparse(PrintWriter p,
                    int level)

Prints a source representation of the tree rooted at this node on output stream p.

Specified by:

unparse in class ASTNode

Parameters:

p - the place to display the output.

level - the number of levels of indentation to use if the output requires more than one line.

resolveNames

public void resolveNames(SymbolTable symtab)

Resolves all applied uses of identifiers in the tree rooted at this node.

Specified by:

resolveNames in class ASTNode

Parameters:

symtab - the symbol table to be used.

resolveTypes

public void resolveTypes(ProcDeclNode proc)

Fills in types for all Symbols bound to IdNodes. Prints error messages as necessary.

Specified by:

resolveTypes in class ASTNode

Parameters:

proc - the smallest enclosing procedure or function declaration.

codeGen

public void codeGen(StmtNode loop)

Generates code for this node and all descendants.

Overrides:

codeGen in class DeclNode

Parameters:

loop - the smallest enclosing ForStmtNode or WhileStmtNode, if any.