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Fixed method selection by extern constraint specificity

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This commit is contained in:
Brian Fiete 2021-01-05 13:51:31 -08:00
parent d0d89a552e
commit 56bcb6ecd1
2 changed files with 93 additions and 3 deletions
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40
IDEHelper/Compiler/BfExprEvaluator.cpp
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@ -1000,6 +1000,46 @@ void BfMethodMatcher::CompareMethods(BfMethodInstance* prevMethodInstance, BfTyp
RETURN_RESULTS;
}
if ((newMethodInstance->mMethodDef->mExternalConstraints.size() != 0) || (prevMethodInstance->mMethodDef->mExternalConstraints.size() != 0))
{
struct GenericParamPair
{
BfGenericMethodParamInstance* mParams[2];
GenericParamPair()
{
mParams[0] = NULL;
mParams[1] = NULL;
}
};
Dictionary<BfType*, GenericParamPair> externConstraints;
auto _GetParams = [&](int idx, BfMethodInstance* methodInstance)
{
for (int externConstraintIdx = 0; externConstraintIdx < (int)methodInstance->mMethodDef->mExternalConstraints.size(); externConstraintIdx++)
{
auto genericParam = methodInstance->mMethodInfoEx->mGenericParams[methodInstance->mMethodDef->mGenericParams.size() + externConstraintIdx];
BF_ASSERT(genericParam->mExternType != NULL);
GenericParamPair* pairPtr = NULL;
externConstraints.TryAdd(genericParam->mExternType, NULL, &pairPtr);
pairPtr->mParams[idx] = genericParam;
}
};
_GetParams(0, newMethodInstance);
_GetParams(0, prevMethodInstance);
for (auto kv : externConstraints)
{
SET_BETTER_OR_WORSE(mModule->AreConstraintsSubset(kv.mValue.mParams[1], kv.mValue.mParams[0]), mModule->AreConstraintsSubset(kv.mValue.mParams[0], kv.mValue.mParams[1]));
}
if ((isBetter) || (isWorse))
{
RETURN_RESULTS;
}
}
// Does one have a body and one doesn't? Obvious!
isBetter = prevMethodDef->IsEmptyPartial();
isWorse = newMethodDef->IsEmptyPartial();

50
IDEHelper/Tests/src/Generics2.bf Normal file
View file

@ -0,0 +1,50 @@
using System;
namespace Tests
{
class Generics2
{
struct TestFunc<T, Del>
{
private int mId;
private Del mComparer;
public static TestFunc<T, Del> Create(int id, Del comparer)
{
return .()
{
mId = id,
mComparer = comparer
};
}
public bool CheckDlg(T item)
{
return false;
}
public bool CheckDlg(T item) where Del : delegate bool(T)
{
return mComparer(item);
}
public bool CheckDlg(T item) where Del : delegate bool(int, T)
{
return mComparer(mId, item);
}
public bool CallCheck(T val)
{
return CheckDlg(val);
}
}
[Test]
public static void TestBasics()
{
let testF = TestFunc<String, delegate bool(String)>.Create(10, scope (s) => s == "Str");
Test.Assert(testF.CallCheck("Str"));
Test.Assert(!testF.CallCheck("Str2"));
}
}
}