kawa.standard
Class define_variable

java.lang.Object
  kawa.lang.Syntax
      kawa.standard.define_variable

All Implemented Interfaces:

Named, Printable

public class define_variable
extends Syntax

"define-variable" is like define, but ignored if variable already bound.

Field Summary

static define_variable

define_variable

Constructor Summary

define_variable()

Method Summary

Expression	rewriteForm(Pair form, Translator tr)
boolean	scanForDefinitions(Pair st, java.util.Vector forms, ScopeExp defs, Translator tr) Check if a statement is a definition, for initial pass.

Methods inherited from class kawa.lang.Syntax

getName, getSymbol, print, rewrite, rewriteForm, scanForm, setName, setName

Methods inherited from class java.lang.Object

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

Field Detail

define_variable

public static final define_variable define_variable

Constructor Detail

define_variable

public define_variable()

Method Detail

scanForDefinitions

public boolean scanForDefinitions(Pair st,
                                  java.util.Vector forms,
                                  ScopeExp defs,
                                  Translator tr)

Description copied from class: Syntax

Check if a statement is a definition, for initial pass. Semi-deprecated - should convert calls to use scanForm.

Overrides:

scanForDefinitions in class Syntax

Parameters:

st - the statement to check

forms - where to append the (possibly-modified) statement

defs - where to add Declarations for found definitions

tr - the compilation state

Returns:

true on success

rewriteForm

public Expression rewriteForm(Pair form,
                              Translator tr)

Overrides:

rewriteForm in class Syntax