public DekiScriptExpression Visit(DekiScriptUnary expr, DekiScriptExpressionEvaluationState state)
{
DekiScriptExpression value = expr.Value.VisitWith(this, state);
DekiScriptExpression result = DekiScriptExpression.UnaryOp(expr.Location, expr.OpCode, value);
if (value is DekiScriptLiteral)
{
return(state.Pop(result.VisitWith(DekiScriptExpressionEvaluation.Instance, state)));
}
return(result);
}
public DekiScriptExpression Visit(DekiScriptUnary expr, DekiScriptOptimizerState state)
{
DekiScriptExpression value = expr.Value.VisitWith(this, state);
DekiScriptExpression result = new DekiScriptUnary(expr.Line, expr.Column, expr.OpCode, value);
if (value is DekiScriptLiteral)
{
return(result.Evaluate(state.Env));
}
return(result);
}
public DekiScriptOutputBuffer.Range Visit(DekiScriptUnary expr, DekiScriptExpressionEvaluationState state)
{
switch (expr.OpCode)
{
case DekiScriptUnary.Op.Negate:
return(state.Push(DekiScriptExpression.Constant(-state.Pop(expr.Value.VisitWith(this, state)).AsNumber())));
case DekiScriptUnary.Op.LogicalNot:
return(state.Push(DekiScriptExpression.Constant(state.Pop(expr.Value.VisitWith(this, state)).IsNilFalseZero)));
case DekiScriptUnary.Op.TypeOf:
return(state.Push(DekiScriptExpression.Constant(state.Pop(expr.Value.VisitWith(this, state)).ScriptTypeName)));
case DekiScriptUnary.Op.Length: {
DekiScriptLiteral value = state.Pop(expr.Value.VisitWith(this, state));
switch (value.ScriptType)
{
case DekiScriptType.NIL:
return(state.Push(DekiScriptExpression.Constant(0)));
case DekiScriptType.LIST:
return(state.Push(DekiScriptExpression.Constant(((DekiScriptList)value).Value.Count)));
case DekiScriptType.STR:
return(state.Push(DekiScriptExpression.Constant(((DekiScriptString)value).Value.Length)));
case DekiScriptType.MAP:
return(state.Push(DekiScriptExpression.Constant(((DekiScriptMap)value).Value.Count)));
case DekiScriptType.XML:
return(state.Push(DekiScriptExpression.Constant(((DekiScriptXml)value).Value.ListLength)));
default:
return(DekiScriptOutputBuffer.Range.Empty);
}
}
}
throw new InvalidOperationException("invalid op code:" + expr.OpCode);
}
public DekiScriptLiteral Visit(DekiScriptUnary expr, DekiScriptEnv env)
{
switch (expr.OpCode)
{
case DekiScriptUnary.Op.Negate:
return(DekiScriptNumber.New(-expr.Value.VisitWith(this, env).AsNumber()));
case DekiScriptUnary.Op.LogicalNot:
return(DekiScriptBool.New(expr.Value.VisitWith(this, env).IsNilFalseZero));
case DekiScriptUnary.Op.TypeOf:
return(DekiScriptString.New(expr.Value.VisitWith(this, env).ScriptTypeName));
case DekiScriptUnary.Op.Length: {
DekiScriptLiteral value = expr.Value.VisitWith(this, env);
switch (value.ScriptType)
{
case DekiScriptType.NIL:
return(DekiScriptNumber.New(0));
case DekiScriptType.LIST:
return(DekiScriptNumber.New(((DekiScriptList)value).Value.Count));
case DekiScriptType.STR:
return(DekiScriptNumber.New(((DekiScriptString)value).Value.Length));
case DekiScriptType.MAP:
return(DekiScriptNumber.New(((DekiScriptMap)value).Value.Count));
case DekiScriptType.XML:
return(DekiScriptNumber.New(((DekiScriptXml)value).Value.ListLength));
default:
return(DekiScriptNil.Value);
}
}
}
throw new InvalidOperationException("invalid op code:" + expr.OpCode);
}
