Class BlockNode

Object
  ASTNode
      BlockNode

public class BlockNode
extends ASTNode

An AST node representing a block (procedure or function body): "decls BEGIN stmts END".

Nested Class Summary

Nested classes/interfaces inherited from class ASTNode

ASTNode.Opcode

Field Summary

List<DeclNode>	decls List of variables, functions, and procedures declared locally in the block.
List<StmtNode>	stmts List of statements in the block.

Constructor Summary

BlockNode()

Method Summary

void	codeGen(StmtNode loop) Generates code for this block and all its contents.
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

Field Detail

decls

public List<DeclNode> decls

List of variables, functions, and procedures declared locally in the block. May be a zero-length list, but must not be null.

stmts

public List<StmtNode> stmts

List of statements in the block. Must be a non-empty list.

Constructor Detail

BlockNode

public BlockNode()

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 block and all its contents.

Parameters:

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