public VarargExpressionGenerator(GeneratorFactory factory, FunctionDefinitionSyntaxNode func, VarargExpressionSyntaxNode expr) : base(0)
{
_isVararg = expr.ReceiverMultiRetState == ExpressionReceiverMultiRetState.Variable;
_type = func.VarargType.GetVMSpecializationType();
_funcVarargSig = factory.Function.VarargSignature;
}
public override void EmitGet(InstructionWriter writer, IStackFragment sigBlock, StackSignature sigType,
int sigIndex, bool keepSig)
{
Debug.Assert(_isVararg);
if (sigIndex > 255 || sigBlock.Offset > 255 | sigType.FixedSize > 127)
{
throw new NotImplementedException();
}
//Note that for VARG/VARGC, we are using a different version of R1-R3. See OpCodes doc for details.
Debug.Assert(_funcVarargSig.FixedSize == 0);
if (_funcVarargSig.IsCompatibleWith(sigType))
{
writer.WriteUUS(keepSig ? OpCodes.VARG : OpCodes.VARGC,
sigBlock.Offset, sigIndex, sigType.FixedSize);
}
else
{
writer.WriteUUS(keepSig ? OpCodes.VARG : OpCodes.VARGC,
sigBlock.Offset, sigIndex, -1);
}
}
//For vararg expr: calculate the value and write to stack at sigblock's location, with the given sig index.
//The sigIndex is the index into proto's signature list. This should be the out signature of function calls.
//sigType is the instance at sig index. It is needed by the new sig adjustment method.
//EmitPrep will be called before this.
public virtual void EmitGet(InstructionWriter writer, IStackFragment sigBlock, StackSignature sigType,
int sigIndex, bool keepSig)
{
throw new NotSupportedException();
}
