C++ TIntermSymbol::getName方法代码示例

//
// Merge the linker objects from unitLinkerObjects into linkerObjects.
// Duplication is expected and filtered out, but contradictions are an error.
//
void TIntermediate::mergeLinkerObjects(TInfoSink& infoSink, TIntermSequence& linkerObjects, const TIntermSequence& unitLinkerObjects)
{
    // Error check and merge the linker objects (duplicates should not be created)
    std::size_t initialNumLinkerObjects = linkerObjects.size();
    for (unsigned int unitLinkObj = 0; unitLinkObj < unitLinkerObjects.size(); ++unitLinkObj) {
        bool merge = true;
        for (std::size_t linkObj = 0; linkObj < initialNumLinkerObjects; ++linkObj) {
            TIntermSymbol* symbol = linkerObjects[linkObj]->getAsSymbolNode();
            TIntermSymbol* unitSymbol = unitLinkerObjects[unitLinkObj]->getAsSymbolNode();
            assert(symbol && unitSymbol);
            if (symbol->getName() == unitSymbol->getName()) {
                // filter out copy
                merge = false;

                // but if one has an initializer and the other does not, update
                // the initializer
                if (symbol->getConstArray().empty() && ! unitSymbol->getConstArray().empty())
                    symbol->setConstArray(unitSymbol->getConstArray());

                // Similarly for binding
                if (! symbol->getQualifier().hasBinding() && unitSymbol->getQualifier().hasBinding())
                    symbol->getQualifier().layoutBinding = unitSymbol->getQualifier().layoutBinding;

                // Update implicit array sizes
                mergeImplicitArraySizes(symbol->getWritableType(), unitSymbol->getType());

                // Check for consistent types/qualification/initializers etc.
                mergeErrorCheck(infoSink, *symbol, *unitSymbol, false);
            }
        }
        if (merge)
            linkerObjects.push_back(unitLinkerObjects[unitLinkObj]);
    }
}

// Test for and give an error if the node can't be read from.
void TParseContextBase::rValueErrorCheck(const TSourceLoc& loc, const char* op, TIntermTyped* node)
{
    if (! node)
        return;

    TIntermBinary* binaryNode = node->getAsBinaryNode();
    if (binaryNode) {
        switch(binaryNode->getOp()) {
        case EOpIndexDirect:
        case EOpIndexIndirect:
        case EOpIndexDirectStruct:
        case EOpVectorSwizzle:
        case EOpMatrixSwizzle:
            rValueErrorCheck(loc, op, binaryNode->getLeft());
        default:
            break;
        }

        return;
    }

    TIntermSymbol* symNode = node->getAsSymbolNode();
    if (symNode && symNode->getQualifier().writeonly)
        error(loc, "can't read from writeonly object: ", op, symNode->getName().c_str());
}

// TODO(jmadill): This is not complete.
void TOutputVulkanGLSL::writeLayoutQualifier(TIntermTyped *variable)
{
    const TType &type = variable->getType();

    bool needsCustomLayout =
        (type.getQualifier() == EvqAttribute || type.getQualifier() == EvqFragmentOut ||
         type.getQualifier() == EvqVertexIn || IsVarying(type.getQualifier()) ||
         IsSampler(type.getBasicType()) || type.isInterfaceBlock());

    if (!NeedsToWriteLayoutQualifier(type) && !needsCustomLayout)
    {
        return;
    }

    TInfoSinkBase &out                      = objSink();
    const TLayoutQualifier &layoutQualifier = type.getLayoutQualifier();

    // This isn't super clean, but it gets the job done.
    // See corresponding code in GlslangWrapper.cpp.
    TIntermSymbol *symbol = variable->getAsSymbolNode();
    ASSERT(symbol);

    ImmutableString name      = symbol->getName();
    const char *blockStorage  = nullptr;
    const char *matrixPacking = nullptr;

    // For interface blocks, use the block name instead.  When the layout qualifier is being
    // replaced in the backend, that would be the name that's available.
    if (type.isInterfaceBlock())
    {
        const TInterfaceBlock *interfaceBlock = type.getInterfaceBlock();
        name                                  = interfaceBlock->name();
        TLayoutBlockStorage storage           = interfaceBlock->blockStorage();

        // Make sure block storage format is specified.
        if (storage != EbsStd430)
        {
            // Change interface block layout qualifiers to std140 for any layout that is not
            // explicitly set to std430.  This is to comply with GL_KHR_vulkan_glsl where shared and
            // packed are not allowed (and std140 could be used instead) and unspecified layouts can
            // assume either std140 or std430 (and we choose std140 as std430 is not yet universally
            // supported).
            storage = EbsStd140;
        }

        blockStorage = getBlockStorageString(storage);
    }

    // Specify matrix packing if necessary.
    if (layoutQualifier.matrixPacking != EmpUnspecified)
    {
        matrixPacking = getMatrixPackingString(layoutQualifier.matrixPacking);
    }

    if (needsCustomLayout)
    {
        out << "@@ LAYOUT-" << name << "(";
    }
    else
    {
        out << "layout(";
    }

    // Output the list of qualifiers already known at this stage, i.e. everything other than
    // `location` and `set`/`binding`.
    std::string otherQualifiers = getCommonLayoutQualifiers(variable);

    const char *separator = "";
    if (blockStorage)
    {
        out << separator << blockStorage;
        separator = ", ";
    }
    if (matrixPacking)
    {
        out << separator << matrixPacking;
        separator = ", ";
    }
    if (!otherQualifiers.empty())
    {
        out << separator << otherQualifiers;
    }

    out << ") ";
    if (needsCustomLayout)
    {
        out << "@@";
    }
}

//
// Both test and if necessary, spit out an error, to see if the node is really
// an l-value that can be operated on this way.
//
// Returns true if there was an error.
//
bool TParseContextBase::lValueErrorCheck(const TSourceLoc& loc, const char* op, TIntermTyped* node)
{
    TIntermBinary* binaryNode = node->getAsBinaryNode();

    if (binaryNode) {
        switch(binaryNode->getOp()) {
        case EOpIndexDirect:
        case EOpIndexIndirect:     // fall through
        case EOpIndexDirectStruct: // fall through
        case EOpVectorSwizzle:
        case EOpMatrixSwizzle:
            return lValueErrorCheck(loc, op, binaryNode->getLeft());
        default:
            break;
        }
        error(loc, " l-value required", op, "", "");

        return true;
    }

    const char* symbol = nullptr;
    TIntermSymbol* symNode = node->getAsSymbolNode();
    if (symNode != nullptr)
        symbol = symNode->getName().c_str();

    const char* message = nullptr;
    switch (node->getQualifier().storage) {
    case EvqConst:          message = "can't modify a const";        break;
    case EvqConstReadOnly:  message = "can't modify a const";        break;
    case EvqUniform:        message = "can't modify a uniform";      break;
    case EvqBuffer:
        if (node->getQualifier().readonly)
            message = "can't modify a readonly buffer";
        break;

    default:
        //
        // Type that can't be written to?
        //
        switch (node->getBasicType()) {
        case EbtSampler:
            message = "can't modify a sampler";
            break;
        case EbtAtomicUint:
            message = "can't modify an atomic_uint";
            break;
        case EbtVoid:
            message = "can't modify void";
            break;
        default:
            break;
        }
    }

    if (message == nullptr && binaryNode == nullptr && symNode == nullptr) {
        error(loc, " l-value required", op, "", "");

        return true;
    }

    //
    // Everything else is okay, no error.
    //
    if (message == nullptr)
        return false;

    //
    // If we get here, we have an error and a message.
    //
    if (symNode)
        error(loc, " l-value required", op, "\"%s\" (%s)", symbol, message);
    else
        error(loc, " l-value required", op, "(%s)", message);

    return true;
}

//
// Compare two global objects from two compilation units and see if they match
// well enough.  Rules can be different for intra- vs. cross-stage matching.
//
// This function only does one of intra- or cross-stage matching per call.
//
void TIntermediate::mergeErrorCheck(TInfoSink& infoSink, const TIntermSymbol& symbol, const TIntermSymbol& unitSymbol, bool crossStage)
{
    bool writeTypeComparison = false;

    // Types have to match
    if (symbol.getType() != unitSymbol.getType()) {
        error(infoSink, "Types must match:");
        writeTypeComparison = true;
    }

    // Qualifiers have to (almost) match

    // Storage...
    if (symbol.getQualifier().storage != unitSymbol.getQualifier().storage) {
        error(infoSink, "Storage qualifiers must match:");
        writeTypeComparison = true;
    }

    // Precision...
    if (symbol.getQualifier().precision != unitSymbol.getQualifier().precision) {
        error(infoSink, "Precision qualifiers must match:");
        writeTypeComparison = true;
    }

    // Invariance...
    if (! crossStage && symbol.getQualifier().invariant != unitSymbol.getQualifier().invariant) {
        error(infoSink, "Presence of invariant qualifier must match:");
        writeTypeComparison = true;
    }

    // Precise...
    if (! crossStage && symbol.getQualifier().noContraction != unitSymbol.getQualifier().noContraction) {
        error(infoSink, "Presence of precise qualifier must match:");
        writeTypeComparison = true;
    }

    // Auxiliary and interpolation...
    if (symbol.getQualifier().centroid  != unitSymbol.getQualifier().centroid ||
        symbol.getQualifier().smooth    != unitSymbol.getQualifier().smooth ||
        symbol.getQualifier().flat      != unitSymbol.getQualifier().flat ||
        symbol.getQualifier().sample    != unitSymbol.getQualifier().sample ||
        symbol.getQualifier().patch     != unitSymbol.getQualifier().patch ||
        symbol.getQualifier().nopersp   != unitSymbol.getQualifier().nopersp) {
        error(infoSink, "Interpolation and auxiliary storage qualifiers must match:");
        writeTypeComparison = true;
    }

    // Memory...
    if (symbol.getQualifier().coherent  != unitSymbol.getQualifier().coherent ||
        symbol.getQualifier().volatil   != unitSymbol.getQualifier().volatil ||
        symbol.getQualifier().restrict  != unitSymbol.getQualifier().restrict ||
        symbol.getQualifier().readonly  != unitSymbol.getQualifier().readonly ||
        symbol.getQualifier().writeonly != unitSymbol.getQualifier().writeonly) {
        error(infoSink, "Memory qualifiers must match:");
        writeTypeComparison = true;
    }

    // Layouts... 
    // TODO: 4.4 enhanced layouts: Generalize to include offset/align: current spec 
    //       requires separate user-supplied offset from actual computed offset, but 
    //       current implementation only has one offset.
    if (symbol.getQualifier().layoutMatrix    != unitSymbol.getQualifier().layoutMatrix ||
        symbol.getQualifier().layoutPacking   != unitSymbol.getQualifier().layoutPacking ||
        symbol.getQualifier().layoutLocation  != unitSymbol.getQualifier().layoutLocation ||
        symbol.getQualifier().layoutComponent != unitSymbol.getQualifier().layoutComponent ||
        symbol.getQualifier().layoutIndex     != unitSymbol.getQualifier().layoutIndex ||
        symbol.getQualifier().layoutBinding   != unitSymbol.getQualifier().layoutBinding ||
        (symbol.getQualifier().hasBinding() && (symbol.getQualifier().layoutOffset != unitSymbol.getQualifier().layoutOffset))) {
        error(infoSink, "Layout qualification must match:");
        writeTypeComparison = true;
    }

    // Initializers have to match, if both are present, and if we don't already know the types don't match
    if (! writeTypeComparison) {
        if (! symbol.getConstArray().empty() && ! unitSymbol.getConstArray().empty()) {
            if (symbol.getConstArray() != unitSymbol.getConstArray()) {
                error(infoSink, "Initializers must match:");
                infoSink.info << "    " << symbol.getName() << "\n";
            }
        }
    }

    if (writeTypeComparison)
        infoSink.info << "    " << symbol.getName() << ": \"" << symbol.getType().getCompleteString() << "\" versus \"" <<
                                                             unitSymbol.getType().getCompleteString() << "\"\n";
}