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New function/delegate casting rules, similar to tuple rules

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This commit is contained in:
Brian Fiete 2020-03-31 07:46:01 -07:00
parent c62dbdf811
commit de6a68911a
8 changed files with 143 additions and 32 deletions
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79
IDEHelper/Compiler/BfModuleTypeUtils.cpp
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@ -9530,6 +9530,62 @@ BfTypedValue BfModule::Cast(BfAstNode* srcNode, const BfTypedValue& typedVal, Bf
return BfTypedValue();
}
// Function->Function and Delegate->Delegate where type is compatible but not exact
if (((typedVal.mType->IsDelegate()) || (typedVal.mType->IsFunction())) &&
((typedVal.mType->IsDelegate()) == (toType->IsDelegate())) &&
((typedVal.mType->IsFunction()) == (toType->IsFunction())))
{
auto fromDelegateType = (BfDelegateType*)typedVal.mType->ToTypeInstance();
auto toDelegateType = (BfDelegateType*)toType;
if (fromDelegateType->mReturnType == toDelegateType->mReturnType)
{
auto fromMethodInst = GetRawMethodByName(fromDelegateType, "Invoke");
auto toMethodInst = GetRawMethodByName(toDelegateType, "Invoke");
if ((fromMethodInst->mMethodDef->mCallingConvention == toMethodInst->mMethodDef->mCallingConvention) &&
(fromMethodInst->mReturnType == toMethodInst->mReturnType) &&
(fromMethodInst->GetParamCount() == toMethodInst->GetParamCount()))
{
bool matched = true;
StringT<64> fromParamName;
StringT<64> toParamName;
for (int paramIdx = 0; paramIdx < (int)fromMethodInst->GetParamCount(); paramIdx++)
{
bool nameMatches = true;
if (!explicitCast)
{
fromMethodInst->GetParamName(paramIdx, fromParamName);
toMethodInst->GetParamName(paramIdx, toParamName);
if ((!fromParamName.IsEmpty()) && (!toParamName.IsEmpty()))
nameMatches = fromParamName == toParamName;
}
if ((fromMethodInst->GetParamKind(paramIdx) == toMethodInst->GetParamKind(paramIdx)) &&
(fromMethodInst->GetParamType(paramIdx) == toMethodInst->GetParamType(paramIdx)) &&
(nameMatches))
{
// Matched, required for implicit/explicit
}
else
{
matched = false;
break;
}
}
if (matched)
{
BfTypedValue loadedVal = LoadValue(typedVal);
return BfTypedValue(mBfIRBuilder->CreateBitCast(loadedVal.mValue, mBfIRBuilder->MapType(toType)), toType);
}
}
}
}
// Struct truncate
if ((typedVal.mType->IsStruct()) && (toType->IsStruct()))
{
@ -10012,6 +10068,16 @@ void BfModule::DoTypeToString(StringImpl& str, BfType* resolvedType, BfTypeNameF
auto methodDef = delegateType->mTypeDef->mMethods[0];
switch (methodDef->mCallingConvention)
{
case BfCallingConvention_Stdcall:
str += "[StdCall] ";
break;
case BfCallingConvention_Fastcall:
str += "[FastCall] ";
break;
}
if (resolvedType->IsDelegateFromTypeRef())
str += "delegate ";
else
@ -10024,13 +10090,14 @@ void BfModule::DoTypeToString(StringImpl& str, BfType* resolvedType, BfTypeNameF
str += ", ";
auto paramDef = methodDef->mParams[paramIdx];
BfTypeNameFlags innerFlags = (BfTypeNameFlags)(typeNameFlags & ~(BfTypeNameFlag_OmitNamespace | BfTypeNameFlag_OmitOuterType));
//TODO: Why was this necessary? It made some errors show incorrectly
// if (delegateType->mIsUnspecializedTypeVariation)
// innerFlags = (BfTypeNameFlags)(innerFlags & ~BfTypeNameFlag_ResolveGenericParamNames);
DoTypeToString(str, delegateType->mParams[paramIdx], innerFlags, genericMethodNameOverrides);
str += " ";
str += paramDef->mName;
if (!paramDef->mName.IsEmpty())
{
str += " ";
str += paramDef->mName;
}
}
str += ")";