public override void Emit(CodeGen cg)
{
if (_typeOperand.IsAssignableFrom(_expression.Type))
{
// if its always true just emit the bool
cg.EmitConstant(true);
return;
}
_expression.EmitAsObject(cg);
EmitLocation(cg);
cg.Emit(OpCodes.Isinst, _typeOperand);
cg.Emit(OpCodes.Ldnull);
cg.Emit(OpCodes.Cgt_Un);
if (ScriptDomainManager.Options.LightweightDebugging)
{
if (!cg.IsDynamicMethod)
{
var s = SpanToLong(Span);
cg.EmitConstant(s);
cg.EmitCall(Debugging.DebugMethods.ExpressionOut);
}
}
}
public override void Emit(CodeGen cg)
{
//EmitLocation(cg);
_value.EmitAsObject(cg);
cg.EmitCodeContext();
cg.EmitSymbolId(_name);
cg.EmitCall(typeof(RuntimeHelpers), "SetNameReorder");
}
private bool EmitBranchTrue(CodeGen cg, AstNodeType nodeType, Label label)
{
switch (nodeType)
{
case AstNodeType.GreaterThan:
_left.EmitAs(cg, GetEmitType());
_right.EmitAs(cg, GetEmitType());
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Bgt, label);
cg.EmitSequencePointNone();
return(true);
case AstNodeType.GreaterThanOrEqual:
_left.EmitAs(cg, GetEmitType());
_right.EmitAs(cg, GetEmitType());
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Bge, label);
cg.EmitSequencePointNone();
return(true);
case AstNodeType.LessThan:
_left.EmitAs(cg, GetEmitType());
_right.EmitAs(cg, GetEmitType());
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Blt, label);
cg.EmitSequencePointNone();
return(true);
case AstNodeType.LessThanOrEqual:
_left.EmitAs(cg, GetEmitType());
_right.EmitAs(cg, GetEmitType());
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Ble, label);
cg.EmitSequencePointNone();
return(true);
case AstNodeType.Equal:
if (_left.IsConstant(null))
{
_right.EmitAsObject(cg);
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Brfalse, label);
cg.EmitSequencePointNone();
}
else if (_right.IsConstant(null))
{
_left.EmitAsObject(cg);
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Brfalse, label);
cg.EmitSequencePointNone();
}
else
{
_left.EmitAs(cg, GetEmitType());
_right.EmitAs(cg, GetEmitType());
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Beq, label);
cg.EmitSequencePointNone();
}
return(true);
case AstNodeType.NotEqual:
if (_left.IsConstant(null))
{
_right.EmitAsObject(cg);
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Brtrue, label);
cg.EmitSequencePointNone();
}
else if (_right.IsConstant(null))
{
_left.EmitAsObject(cg);
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Brtrue, label);
cg.EmitSequencePointNone();
}
else
{
_left.EmitAs(cg, GetEmitType());
_right.EmitAs(cg, GetEmitType());
//cg.Emit(OpCodes.Ceq);
cg.EmitSequencePointNone();
cg.Emit(OpCodes.Bne_Un, label);
cg.EmitSequencePointNone();
}
return(true);
case AstNodeType.AndAlso:
// if (left AND right) branch label
// if (left) then
// if (right) branch label
// endif
Label endif = cg.DefineLabel();
_left.EmitBranchFalse(cg, endif);
_right.EmitBranchTrue(cg, label);
cg.MarkLabel(endif);
return(true);
case AstNodeType.OrElse:
// if (left OR right) branch label
// if (left) then branch label endif
// if (right) then branch label endif
_left.EmitBranchTrue(cg, label);
_right.EmitBranchTrue(cg, label);
return(true);
default:
return(false);
}
}
