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Fixed const expr preference in method selection

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This commit is contained in:
Brian Fiete 2020-08-01 12:16:17 -07:00
parent fb960747ec
commit 91dea6cd3b
2 changed files with 69 additions and 13 deletions
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54
IDEHelper/Compiler/BfExprEvaluator.cpp
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@ -678,6 +678,9 @@ void BfMethodMatcher::CompareMethods(BfMethodInstance* prevMethodInstance, BfTyp
bool betterByGenericParam = false;
bool worseByGenericParam = false;
bool betterByConstExprParam = false;
bool worseByConstExprParam = false;
for (argIdx = anyIsExtension ? -1 : 0; argIdx < (int)mArguments.size(); argIdx++)
{
BfTypedValue arg;
@ -708,12 +711,20 @@ void BfMethodMatcher::CompareMethods(BfMethodInstance* prevMethodInstance, BfTyp
BfType* origParamType = paramType;
BfType* origPrevParamType = prevParamType;
bool paramWasConstExpr = false;
bool prevParamWasConstExpr = false;
bool paramWasUnspecialized = paramType->IsUnspecializedType();
if ((genericArgumentsSubstitute != NULL) && (paramWasUnspecialized))
{
paramType = mModule->ResolveGenericType(paramType, NULL, genericArgumentsSubstitute, allowSpecializeFail);
paramType = mModule->FixIntUnknown(paramType);
}
if (paramType->IsConstExprValue())
{
prevParamWasConstExpr = true;
paramType = ((BfConstExprValueType*)paramType)->mType;
}
bool prevParamWasUnspecialized = prevParamType->IsUnspecializedType();
if ((prevGenericArgumentsSubstitute != NULL) && (prevParamWasUnspecialized))
@ -721,6 +732,11 @@ void BfMethodMatcher::CompareMethods(BfMethodInstance* prevMethodInstance, BfTyp
prevParamType = mModule->ResolveGenericType(prevParamType, NULL, prevGenericArgumentsSubstitute, allowSpecializeFail);
prevParamType = mModule->FixIntUnknown(prevParamType);
}
if (prevParamType->IsConstExprValue())
{
prevParamWasConstExpr = true;
prevParamType = ((BfConstExprValueType*)prevParamType)->mType;
}
bool paramsEquivalent = paramType == prevParamType;
@ -734,10 +750,7 @@ void BfMethodMatcher::CompareMethods(BfMethodInstance* prevMethodInstance, BfTyp
bool isPrevUnspecializedParam = prevParamType->IsUnspecializedType();
SET_BETTER_OR_WORSE((!isUnspecializedParam) && (!paramType->IsVar()),
(!isPrevUnspecializedParam) && (!prevParamType->IsVar()));
if ((!isBetter) && (!isWorse))
SET_BETTER_OR_WORSE(paramType->IsConstExprValue(), prevParamType->IsConstExprValue());
if ((!isBetter) && (!isWorse) && (!isUnspecializedParam) && (!isPrevUnspecializedParam))
{
SET_BETTER_OR_WORSE((paramType != NULL) && (!paramType->IsUnspecializedType()),
@ -785,16 +798,22 @@ void BfMethodMatcher::CompareMethods(BfMethodInstance* prevMethodInstance, BfTyp
}
}
if (((!isBetter) && (!isWorse)) && (paramsEquivalent) &&
((paramWasUnspecialized) || (prevParamWasUnspecialized)))
if ((!isBetter) & (!isWorse) && (paramsEquivalent))
{
int origTypeMoreSpecific = GetMostSpecificType(origParamType, origPrevParamType);
if (origTypeMoreSpecific == 0)
betterByGenericParam = true;
else if (origTypeMoreSpecific == 1)
worseByGenericParam = true;
if ((origParamType != origPrevParamType) && (paramWasConstExpr) && (!prevParamWasConstExpr))
betterByConstExprParam = true;
else if ((origParamType != origPrevParamType) && (!paramWasConstExpr) && (prevParamWasConstExpr))
worseByConstExprParam = true;
else if (((paramWasUnspecialized) || (prevParamWasUnspecialized)))
{
int origTypeMoreSpecific = GetMostSpecificType(origParamType, origPrevParamType);
if (origTypeMoreSpecific == 0)
betterByGenericParam = true;
else if (origTypeMoreSpecific == 1)
worseByGenericParam = true;
}
}
if ((newArgIdx >= 0) && (newMethodInstance->GetParamKind(newArgIdx) == BfParamKind_Params))
usedExtendedForm = true;
if ((prevArgIdx >= 0) && (prevMethodInstance->GetParamKind(prevArgIdx) == BfParamKind_Params))
@ -815,6 +834,17 @@ void BfMethodMatcher::CompareMethods(BfMethodInstance* prevMethodInstance, BfTyp
}
}
if ((!isBetter) && (!isWorse))
{
// Don't allow ambiguity
if ((betterByConstExprParam && !worseByConstExprParam) ||
(!betterByConstExprParam && worseByConstExprParam))
{
isBetter = betterByConstExprParam;
isWorse = worseByConstExprParam;
}
}
if ((isBetter) || (isWorse))
{
RETURN_RESULTS;