gnu.expr
Class IfExp

java.lang.Object
  gnu.mapping.Procedure
      gnu.mapping.Procedure0
          gnu.expr.Expression
              gnu.expr.IfExp

All Implemented Interfaces:

Named, Printable

public class IfExp
extends Expression

This class represents a conditional.

Field Summary

Fields inherited from class gnu.expr.Expression

flags, NEXT_AVAIL_FLAG, noExpressions

Constructor Summary

IfExp(Expression i, Expression t, Expression e)

Method Summary

void	apply(CallContext ctx) Call this Procedure using the explicit-CallContext-convention.
void	compile(Compilation comp, Target target)
static void	compile(Expression test, Expression then_clause, Expression else_clause, Compilation comp, Target target)
java.lang.Object	eval(Environment env)
protected Language	getLanguage()
void	print(OutPort out)
protected Expression	walk(ExpWalker walker)
protected void	walkChildren(ExpWalker walker)

Methods inherited from class gnu.expr.Expression

apply0, compile, compileButFirst, compileNotePosition, compileWithPosition, compileWithPosition, eval, getColumn, getFile, getFlag, getFlags, getLine, getType, makeWhile, match0, print, printLineColumn, setFile, setFlag, setFlag, setLine, setLine, setLine, setLine

Methods inherited from class gnu.mapping.Procedure0

apply1, apply2, apply3, apply4, applyN, numArgs

Methods inherited from class gnu.mapping.Procedure

apply, check0, check1, check2, check3, check4, checkArgCount, checkN, getName, getProperty, getSetter, getSymbol, match1, match2, match3, match4, matchN, maxArgs, minArgs, name, removeProperty, set0, set1, setN, setName, setProperty, setProperty, setSetter, setSymbol, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

IfExp

public IfExp(Expression i,
             Expression t,
             Expression e)

Method Detail

getLanguage

protected final Language getLanguage()

eval

public java.lang.Object eval(Environment env)
                      throws java.lang.Throwable

Overrides:

eval in class Expression

Throws:

java.lang.Throwable

apply

public void apply(CallContext ctx)
           throws java.lang.Throwable

Description copied from class: Procedure

Call this Procedure using the explicit-CallContext-convention. The input arguments are (by default) in stack.args; the result is written to ctx.consumer.

Overrides:

apply in class Expression

Throws:

java.lang.Throwable

compile

public void compile(Compilation comp,
                    Target target)

Specified by:

compile in class Expression

compile

public static void compile(Expression test,
                           Expression then_clause,
                           Expression else_clause,
                           Compilation comp,
                           Target target)

walk

protected Expression walk(ExpWalker walker)

Overrides:

walk in class Expression

walkChildren

protected void walkChildren(ExpWalker walker)

Overrides:

walkChildren in class Expression

print

public void print(OutPort out)

Specified by:

print in class Expression