antlraux.context.asts
Class TypeAST

java.lang.Object
  |
  +--antlr.BaseAST
        |
        +--antlr.CommonAST
              |
              +--antlraux.util.LexInfoAST
                    |
                    +--antlraux.context.asts.TypeAST

All Implemented Interfaces:

antlr.collections.AST, LexInfo, java.io.Serializable

Direct Known Subclasses:

ExpressionAST

public class TypeAST

extends LexInfoAST

This class may be used when modelling an AST with type information. It sould not be used for expressions; ExpressionAST is more suited for that. This class could be used for easily obtaining the Type of tree node that codes a type. Typically you'll have that kind of node at the beginning of your declarations. For example, in a languaje that declares variables like in C you may have:

 int a;
 

The rule that recognizes this declaration could be:

 declaration: type IDENT SEMI ;
 type : TYPE_INT
      | TYPE_FLOAT
      | ...
      ;
 

TypeAST sould be used in the type rule, like this:

 type : TYPE_INT 
        { ##.setExpType(getType(TYPE_INT)); }
      | TYPE_FLOAT
        ...
      ;
 

Once this is done, you can obtain one type's "expression type" just calling getExpType().

Warning: TypeAST, ExpressionAST and ScopeAST copy first child and sibling with their only constructor. See their constructor's comments for details.

See Also:

Serialized Form

Field Summary

protected static boolean

verboseStringConversion

Fields inherited from class antlr.BaseAST

down, right

Fields inherited from interface antlraux.util.LexInfo

DEFAULT_COLUMN, DEFAULT_FILENAME, DEFAULT_LINE

Constructor Summary

TypeAST()

TypeAST(antlr.collections.AST other)
This constructors calls initialize(AST) so it copies other's first child and next sibling.

Method Summary

Type	getExpType()
void	initialize(antlr.collections.AST ast) Warning: this implementation of initialize copies ast's first child and next sibling.
void	setExpType(Type t)
static void	setVerboseStringConversion(boolean b) If set to true, this adds some additional information to the string generated by toString() (shows the AST's type)
java.lang.String	toString() Returns a String representing the information in the root of the node.

Methods inherited from class antlraux.util.LexInfoAST

addChildLeft, addChildLeftWithSiblings, addSibling, copyLexInfo, getColumn, getFilename, getLastChild, getLastSibling, getLexInfoString, getLine, getPrevChild, initialize, replaceChild, replaceChildWithSiblings, setColumn, setFilename, setLine, tabulate, toStringList, toStringList, toStringTree

Methods inherited from class antlr.CommonAST

getText, getType, initialize, setText, setType

Methods inherited from class antlr.BaseAST

addChild, decode, encode, equals, equalsList, equalsListPartial, equalsTree, equalsTreePartial, findAll, findAllPartial, getFirstChild, getNextSibling, getNumberOfChildren, removeChildren, setFirstChild, setNextSibling, setVerboseStringConversion, xmlSerialize, xmlSerializeNode, xmlSerializeRootClose, xmlSerializeRootOpen

Methods inherited from class java.lang.Object

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

Field Detail

verboseStringConversion

protected static boolean verboseStringConversion

Constructor Detail

TypeAST

public TypeAST()

TypeAST

public TypeAST(antlr.collections.AST other)

This constructors calls initialize(AST) so it copies other's first child and next sibling.

Method Detail

setExpType

public void setExpType(Type t)

getExpType

public Type getExpType()

initialize

public void initialize(antlr.collections.AST ast)

Warning: this implementation of initialize copies ast's first child and next sibling.

Specified by:

initialize in interface antlr.collections.AST

Overrides:

initialize in class LexInfoAST

Parameters:

ast - The AST whose information is to be copied

setVerboseStringConversion

public static void setVerboseStringConversion(boolean b)

If set to true, this adds some additional information to the string generated by toString() (shows the AST's type)

toString

public java.lang.String toString()

Description copied from class: LexInfoAST

Returns a String representing the information in the root of the node. If LexInfoAST.setVerboseStringConversion(boolean) has been set to true, it adds the lex information of the AST (using LexInfoAST.getLexInfoString())

Specified by:

toString in interface antlr.collections.AST

Overrides:

toString in class LexInfoAST