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Luaj 2.0 for the jse platform
/*******************************************************************************
* Copyright (c) 2010 Luaj.org. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
******************************************************************************/
package org.luaj.vm2.ast;
import java.util.List;
import org.luaj.vm2.ast.Exp.VarExp;
abstract
public class Stat extends SyntaxElement {
public abstract void accept(Visitor visitor);
public static Stat block(Block block) {
return block;
}
public static Stat whiledo(Exp exp, Block block) {
return new WhileDo(exp, block);
}
public static Stat repeatuntil(Block block, Exp exp) {
return new RepeatUntil(block, exp);
}
public static Stat breakstat() {
return new Break();
}
public static Stat returnstat(List exps) {
return new Return(exps);
}
public static Stat assignment(List vars, List exps) {
return new Assign(vars,exps);
}
public static Stat functioncall(Exp.FuncCall funccall) {
return new FuncCallStat(funccall);
}
public static Stat localfunctiondef(String name, FuncBody funcbody) {
return new LocalFuncDef(name, funcbody);
}
public static Stat fornumeric(String name, Exp initial, Exp limit, Exp step, Block block) {
return new NumericFor(name, initial, limit, step, block);
}
public static Stat functiondef(FuncName funcname, FuncBody funcbody) {
return new FuncDef( funcname, funcbody );
}
public static Stat forgeneric(List names, List exps, Block block) {
return new GenericFor(names, exps, block);
}
public static Stat localassignment(List names, List values) {
return new LocalAssign(names, values);
}
public static Stat ifthenelse(Exp ifexp, Block ifblock, List elseifexps, List elseifblocks, Block elseblock) {
return new IfThenElse(ifexp, ifblock, elseifexps, elseifblocks, elseblock);
}
public static Stat gotostat(String name) {
return new Goto(name);
}
public static Stat labelstat(String name) {
return new Label(name);
}
public static class Goto extends Stat {
public final String name;
public Goto(String name) {
this.name = name;
}
public void accept(Visitor visitor) {
visitor.visit(this);
}
}
public static class Label extends Stat {
public final String name;
public Label(String name) {
this.name = name;
}
public void accept(Visitor visitor) {
visitor.visit(this);
}
}
public static class Assign extends Stat {
public final List vars;
public final List exps;
public Assign(List vars, List exps) {
this.vars = vars;
this.exps = exps;
}
public void accept(Visitor visitor) {
visitor.visit(this);
}
}
public static class WhileDo extends Stat {
public final Exp exp;
public final Block block;
public WhileDo( Exp exp, Block block ) {
this.exp = exp;
this.block = block;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
public static class RepeatUntil extends Stat {
public final Block block;
public final Exp exp;
public RepeatUntil( Block block, Exp exp ) {
this.block = block;
this.exp = exp;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
public static class Break extends Stat {
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
public static class Return extends Stat {
public final List values;
public Return(List values) {
this.values = values;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
public int nreturns() {
int n = values!=null? values.size(): 0;
if ( n>0 && ((Exp)values.get(n-1)).isvarargexp() )
n = -1;
return n;
}
}
public static class FuncCallStat extends Stat {
public final Exp.FuncCall funccall;
public FuncCallStat(Exp.FuncCall funccall) {
this.funccall = funccall;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
public static class LocalFuncDef extends Stat {
public final Name name;
public final FuncBody body;
public LocalFuncDef(String name, FuncBody body) {
this.name = new Name(name);
this.body = body;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
public static class FuncDef extends Stat {
public final FuncName name;
public final FuncBody body;
public FuncDef(FuncName name, FuncBody body) {
this.name = name;
this.body = body;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
public static class GenericFor extends Stat {
public List names;
public List exps;
public Block block;
public NameScope scope;
public GenericFor(List names, List exps, Block block) {
this.names = names;
this.exps = exps;
this.block = block;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
public static class NumericFor extends Stat {
public final Name name;
public final Exp initial,limit,step;
public final Block block;
public NameScope scope;
public NumericFor(String name, Exp initial, Exp limit, Exp step, Block block) {
this.name = new Name(name);
this.initial = initial;
this.limit = limit;
this.step = step;
this.block = block;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
public static class LocalAssign extends Stat {
public final List names;
public final List values;
public LocalAssign(List names, List values) {
this.names = names;
this.values = values;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
public static class IfThenElse extends Stat {
public final Exp ifexp;
public final Block ifblock;
public final List elseifexps;
public final List elseifblocks;
public final Block elseblock;
public IfThenElse(Exp ifexp, Block ifblock, List elseifexps,
List elseifblocks, Block elseblock) {
this.ifexp = ifexp;
this.ifblock = ifblock;
this.elseifexps = elseifexps;
this.elseifblocks = elseifblocks;
this.elseblock = elseblock;
}
public void accept(Visitor visitor) {
visitor.visit( this );
}
}
}