public static void AppendCast(this TranslationContext context, IType source, IType target)
{
if (ReferenceEquals(source, target))
{
return;
}
Checks.CheckValidCast(source, target);
var cast = (context.Provider.Cast(source, target, false) ?? Enumerable.Empty <IInstruction>()).ToArray();
if (cast.Length > 0)
{
var block = context.Block;
var stack = block.Stack;
var item = stack.Pop();
stack.PushResult(item.Instruction, target);
var code = block.TranslatedCode;
int n = code.Count;
if (n == 0)
{
throw new ILTranslatorException("Translated code is empty");
}
if (code[n - 1].IsBranchOrSwitch())
{
code.InsertRange(n - 1, cast);
}
else
{
code.AddRange(cast);
}
}
}
private static bool CastToParamType(TranslationContext context, Instruction instruction, IParameter p, bool force)
{
if (p == null)
{
return(false);
}
var block = context.Block;
if (block.Stack.Count == 0)
{
return(false);
}
var v = block.Stack.Peek();
if (instruction == null)
{
instruction = v.Instruction;
}
if (instruction != null)
{
switch (instruction.Code)
{
case InstructionCode.Box:
case InstructionCode.Ldtoken:
return(false);
}
}
if (v.Value.Kind == ValueKind.Token)
{
return(false);
}
var vtype = v.Type;
var ptype = p.GetUnwrappedType();
if (!ReferenceEquals(vtype, ptype))
{
Checks.CheckValidCast(vtype, ptype);
if (!force)
{
if (!NeedCast(vtype, ptype))
{
return(true);
}
}
context.EmitCast(vtype, ptype);
}
return(true);
}