Function GetFunctionCallCastRanks

hlslparser/src/HLSLParser.cpp:1731–1761

}

static bool GetFunctionCallCastRanks(HLSLTree* tree, const HLSLFunctionCall* call, const HLSLFunction* function, int* rankBuffer)
{
    if (function == NULL || function->numArguments < call->numArguments) {
        // Function not viable
        return false;
    }

    const HLSLExpression* expression = call->argument;
    const HLSLArgument* argument = function->argument;

    for (int i = 0; i < call->numArguments; ++i) {
        int rank = GetTypeCastRank(tree, expression->expressionType, argument->type);
        if (rank == -1) {
            return false;
        }

        rankBuffer[i] = rank;

        argument = argument->nextArgument;
        expression = expression->nextExpression;
    }

    for (int i = call->numArguments; i < function->numArguments; ++i) {
        if (argument->defaultValue == NULL) {
            // Function not viable.
            return false;
        }
    }

    return true;
}

struct CompareRanks {
    bool operator()(const int& rank1, const int& rank2) { return rank1 > rank2; }