Method MatchFunctionCall

hlslparser/src/HLSLParser.cpp:4469–4567

}

const HLSLFunction* HLSLParser::MatchFunctionCall(const HLSLFunctionCall* functionCall, const char* name, const HLSLType* memberType)
{
    const HLSLFunction* matchedFunction = NULL;

    //int  numArguments           = functionCall->numArguments;
    int numMatchedOverloads = 0;
    bool nameMatches = false;

    // Get the user defined c functions with the specified name.
    // There may be more than one, and these are not ordered.
    for (int i = 0; i < m_functions.GetSize(); ++i) {
        const HLSLFunction* function = m_functions[i];
        if (function->name == name) {
            nameMatches = true;

            // if caller requests member function, then memberType must match
            bool isMemberFunc = function->IsMemberFunction();

            if (memberType) {
                if (!isMemberFunc)
                    continue;

                if (memberType->baseType != function->memberType)
                    continue;

                if (memberType->formatType != GetScalarType(function->returnType.baseType))
                    continue;
            }
            else {
                if (isMemberFunc)
                    continue;
            }

            CompareFunctionsResult result = CompareFunctions(m_tree, functionCall, function, matchedFunction);
            if (result == Function1Better) {
                matchedFunction = function;
                numMatchedOverloads = 1;
            }
            else if (result == FunctionsEqual) {
                ++numMatchedOverloads;
            }
        }
    }

    // Get the intrinsic functions with the specified name.
    const auto& iter = _intrinsicRangeMap.find(name);
    if (iter != _intrinsicRangeMap.end()) {
        Range range = iter->second;
        for (int i = 0; i < range.count; ++i) {
            uint32_t idx = range.start + i;
            const HLSLFunction* function = &_intrinsics[idx].function;

            // if caller requests member function, then memberType must match
            bool isMemberFunc = function->IsMemberFunction();
            if (memberType) {
                if (!isMemberFunc)
                    break;