C++ TypeStruct::constOf方法代码示例

void TypeInfoStructDeclaration::toDt(dt_t **pdt)
{
    //printf("TypeInfoStructDeclaration::toDt() '%s'\n", toChars());

    unsigned offset = Type::typeinfostruct->structsize;

    dtxoff(pdt, Type::typeinfostruct->toVtblSymbol(), 0, TYnptr); // vtbl for TypeInfo_Struct
    dtsize_t(pdt, 0);                        // monitor

    assert(tinfo->ty == Tstruct);

    TypeStruct *tc = (TypeStruct *)tinfo;
    StructDeclaration *sd = tc->sym;

    /* Put out:
     *  char[] name;
     *  void[] init;
     *  hash_t function(in void*) xtoHash;
     *  bool function(in void*, in void*) xopEquals;
     *  int function(in void*, in void*) xopCmp;
     *  string function(const(void)*) xtoString;
     *  uint m_flags;
     *  xgetMembers;
     *  xdtor;
     *  xpostblit;
     *  uint m_align;
     *  version (X86_64)
     *      TypeInfo m_arg1;
     *      TypeInfo m_arg2;
     *
     *  name[]
     */

    const char *name = sd->toPrettyChars();
    size_t namelen = strlen(name);
    dtsize_t(pdt, namelen);
    //dtabytes(pdt, TYnptr, 0, namelen + 1, name);
    dtxoff(pdt, toSymbol(), offset, TYnptr);
    offset += namelen + 1;

    // void[] init;
    dtsize_t(pdt, sd->structsize);       // init.length
    if (sd->zeroInit)
        dtsize_t(pdt, 0);                // NULL for 0 initialization
    else
        dtxoff(pdt, sd->toInitializer(), 0, TYnptr);    // init.ptr

    FuncDeclaration *fd;
    FuncDeclaration *fdx;
    TypeFunction *tf;
    Type *ta;
    Dsymbol *s;

    static TypeFunction *tftohash;
    static TypeFunction *tftostring;

    if (!tftohash)
    {
        Scope sc;

        tftohash = new TypeFunction(NULL, Type::thash_t, 0, LINKd);
        tftohash->mod = MODconst;
        tftohash = (TypeFunction *)tftohash->semantic(0, &sc);

        tftostring = new TypeFunction(NULL, Type::tchar->invariantOf()->arrayOf(), 0, LINKd);
        tftostring = (TypeFunction *)tftostring->semantic(0, &sc);
    }

    TypeFunction *tfcmpptr;
    {
        Scope sc;
        Parameters *arguments = new Parameters;
#if STRUCTTHISREF
        // arg type is ref const T
        Parameter *arg = new Parameter(STCref, tc->constOf(), NULL, NULL);
#else
        // arg type is const T*
        Parameter *arg = new Parameter(STCin, tc->pointerTo(), NULL, NULL);
#endif

        arguments->push(arg);
        tfcmpptr = new TypeFunction(arguments, Type::tint32, 0, LINKd);
        tfcmpptr->mod = MODconst;
        tfcmpptr = (TypeFunction *)tfcmpptr->semantic(0, &sc);
    }

    s = search_function(sd, Id::tohash);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {   fd = fdx->overloadExactMatch(tftohash);
        if (fd)
            dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
        else
            //fdx->error("must be declared as extern (D) uint toHash()");
            dtsize_t(pdt, 0);
    }
    else
        dtsize_t(pdt, 0);

    if (sd->eq)
//.........这里部分代码省略.........

void TypeInfoStructDeclaration::llvmDefine()
{
    Logger::println("TypeInfoStructDeclaration::llvmDefine() %s", toChars());
    LOG_SCOPE;

    // make sure struct is resolved
    assert(tinfo->ty == Tstruct);
    TypeStruct *tc = static_cast<TypeStruct *>(tinfo);
    StructDeclaration *sd = tc->sym;

    // can't emit typeinfo for forward declarations
    if (sd->sizeok != 1)
    {
        sd->error("cannot emit TypeInfo for forward declaration");
        fatal();
    }

    sd->codegen(Type::sir);
    IrStruct* irstruct = sd->ir.irStruct;

    RTTIBuilder b(Type::typeinfostruct);

    // char[] name
    b.push_string(sd->toPrettyChars());

    // void[] init
    // never emit a null array, even for zero initialized typeinfo
    // the size() method uses this array!
    size_t init_size = getTypeStoreSize(tc->irtype->getType());
    b.push_void_array(init_size, irstruct->getInitSymbol());

    // toX functions ground work
    static TypeFunction *tftohash;
    static TypeFunction *tftostring;

    if (!tftohash)
    {
        Scope sc;
        tftohash = new TypeFunction(NULL, Type::thash_t, 0, LINKd);
#if DMDV2
        tftohash ->mod = MODconst;
#endif
        tftohash = static_cast<TypeFunction *>(tftohash->semantic(0, &sc));

#if DMDV2
        Type *retType = Type::tchar->invariantOf()->arrayOf();
#else
        Type *retType = Type::tchar->arrayOf();
#endif
        tftostring = new TypeFunction(NULL, retType, 0, LINKd);
        tftostring = static_cast<TypeFunction *>(tftostring->semantic(0, &sc));
    }

    // this one takes a parameter, so we need to build a new one each time
    // to get the right type. can we avoid this?
    TypeFunction *tfcmpptr;
    {
        Scope sc;
        Parameters *arguments = new Parameters;
#if STRUCTTHISREF
        // arg type is ref const T
        Parameter *arg = new Parameter(STCref, tc->constOf(), NULL, NULL);
#else
        // arg type is const T*
        Parameter *arg = new Parameter(STCin, tc->pointerTo(), NULL, NULL);
#endif
        arguments->push(arg);
        tfcmpptr = new TypeFunction(arguments, Type::tint32, 0, LINKd);
#if DMDV2
        tfcmpptr->mod = MODconst;
#endif
        tfcmpptr = static_cast<TypeFunction *>(tfcmpptr->semantic(0, &sc));
    }

    // well use this module for all overload lookups
    Module *gm = getModule();

    // toHash
    FuncDeclaration* fd = find_method_overload(sd, Id::tohash, tftohash, gm);
    b.push_funcptr(fd);

    // opEquals
#if DMDV2
    fd = sd->xeq;
#else
    fd = find_method_overload(sd, Id::eq, tfcmpptr, gm);
#endif
    b.push_funcptr(fd);

    // opCmp
    fd = find_method_overload(sd, Id::cmp, tfcmpptr, gm);
    b.push_funcptr(fd);

    // toString
    fd = find_method_overload(sd, Id::tostring, tftostring, gm);
    b.push_funcptr(fd);

    // uint m_flags;
    unsigned hasptrs = tc->hasPointers() ? 1 : 0;
    b.push_uint(hasptrs);
//.........这里部分代码省略.........

void TypeInfoStructDeclaration::toDt(dt_t **pdt)
{
    //printf("TypeInfoStructDeclaration::toDt() '%s'\n", toChars());
    if (global.params.is64bit)
        verifyStructSize(Type::typeinfostruct, 17 * PTRSIZE);
    else
        verifyStructSize(Type::typeinfostruct, 15 * PTRSIZE);

    dtxoff(pdt, Type::typeinfostruct->toVtblSymbol(), 0, TYnptr); // vtbl for TypeInfo_Struct
    dtsize_t(pdt, 0);                        // monitor

    assert(tinfo->ty == Tstruct);

    TypeStruct *tc = (TypeStruct *)tinfo;
    StructDeclaration *sd = tc->sym;

    /* Put out:
     *  char[] name;
     *  void[] init;
     *  hash_t function(in void*) xtoHash;
     *  bool function(in void*, in void*) xopEquals;
     *  int function(in void*, in void*) xopCmp;
     *  string function(const(void)*) xtoString;
     *  uint m_flags;
     *  //xgetMembers;
     *  xdtor;
     *  xpostblit;
     *  uint m_align;
     *  version (X86_64)
     *      TypeInfo m_arg1;
     *      TypeInfo m_arg2;
     *  xgetRTInfo
     */

    const char *name = sd->toPrettyChars();
    size_t namelen = strlen(name);
    dtsize_t(pdt, namelen);
    dtabytes(pdt, TYnptr, 0, namelen + 1, name);

    // void[] init;
    dtsize_t(pdt, sd->structsize);       // init.length
    if (sd->zeroInit)
        dtsize_t(pdt, 0);                // NULL for 0 initialization
    else
        dtxoff(pdt, sd->toInitializer(), 0, TYnptr);    // init.ptr

    FuncDeclaration *fd;
    FuncDeclaration *fdx;
    Dsymbol *s;

    static TypeFunction *tftohash;
    static TypeFunction *tftostring;

    if (!tftohash)
    {
        Scope sc;

        /* const hash_t toHash();
         */
        tftohash = new TypeFunction(NULL, Type::thash_t, 0, LINKd);
        tftohash->mod = MODconst;
        tftohash = (TypeFunction *)tftohash->semantic(0, &sc);

        tftostring = new TypeFunction(NULL, Type::tchar->invariantOf()->arrayOf(), 0, LINKd);
        tftostring = (TypeFunction *)tftostring->semantic(0, &sc);
    }

    TypeFunction *tfcmpptr;
    {
        Scope sc;

        /* const int opCmp(ref const KeyType s);
         */
        Parameters *arguments = new Parameters;
#if STRUCTTHISREF
        // arg type is ref const T
        Parameter *arg = new Parameter(STCref, tc->constOf(), NULL, NULL);
#else
        // arg type is const T*
        Parameter *arg = new Parameter(STCin, tc->pointerTo(), NULL, NULL);
#endif

        arguments->push(arg);
        tfcmpptr = new TypeFunction(arguments, Type::tint32, 0, LINKd);
        tfcmpptr->mod = MODconst;
        tfcmpptr = (TypeFunction *)tfcmpptr->semantic(0, &sc);
    }

    s = search_function(sd, Id::tohash);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {   fd = fdx->overloadExactMatch(tftohash);
        if (fd)
        {
            dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
            TypeFunction *tf = (TypeFunction *)fd->type;
            assert(tf->ty == Tfunction);
            /* I'm a little unsure this is the right way to do it. Perhaps a better
             * way would to automatically add these attributes to any struct member
             * function with the name "toHash".
//.........这里部分代码省略.........

void TypeInfoStructDeclaration::toDt(dt_t **pdt)
{
    //printf("TypeInfoStructDeclaration::toDt() '%s'\n", toChars());

    unsigned offset = Type::typeinfostruct->structsize;

    dtxoff(pdt, Type::typeinfostruct->toVtblSymbol(), 0, TYnptr); // vtbl for TypeInfo_Struct
    dtdword(pdt, 0);                        // monitor

    assert(tinfo->ty == Tstruct);

    TypeStruct *tc = (TypeStruct *)tinfo;
    StructDeclaration *sd = tc->sym;

    /* Put out:
     *  char[] name;
     *  void[] init;
     *  hash_t function(void*) xtoHash;
     *  int function(void*,void*) xopEquals;
     *  int function(void*,void*) xopCmp;
     *  char[] function(void*) xtoString;
     *  uint m_flags;
     *
     *  name[]
     */

    const char *name = sd->toPrettyChars();
    size_t namelen = strlen(name);
    dtdword(pdt, namelen);
    //dtabytes(pdt, TYnptr, 0, namelen + 1, name);
    dtxoff(pdt, toSymbol(), offset, TYnptr);
    offset += namelen + 1;

    // void[] init;
    dtdword(pdt, sd->structsize);       // init.length
    if (sd->zeroInit)
        dtdword(pdt, 0);                // NULL for 0 initialization
    else
        dtxoff(pdt, sd->toInitializer(), 0, TYnptr);    // init.ptr

    FuncDeclaration *fd;
    FuncDeclaration *fdx;
    TypeFunction *tf;
    Type *ta;
    Dsymbol *s;

    static TypeFunction *tftohash;
    static TypeFunction *tftostring;

    if (!tftohash)
    {
        Scope sc;

        tftohash = new TypeFunction(NULL, Type::thash_t, 0, LINKd);
        tftohash = (TypeFunction *)tftohash->semantic(0, &sc);

        tftostring = new TypeFunction(NULL, Type::tchar->arrayOf(), 0, LINKd);
        tftostring = (TypeFunction *)tftostring->semantic(0, &sc);
    }

    TypeFunction *tfeqptr;
    {
        Scope sc;
        Parameters *arguments = new Parameters;
#if STRUCTTHISREF
        // arg type is ref const T
        Parameter *arg = new Parameter(STCref, tc->constOf(), NULL, NULL);
#else
        // arg type is const T*
        Parameter *arg = new Parameter(STCin, tc->pointerTo(), NULL, NULL);
#endif

        arguments->push(arg);
        tfeqptr = new TypeFunction(arguments, Type::tint32, 0, LINKd);
        tfeqptr = (TypeFunction *)tfeqptr->semantic(0, &sc);
    }

#if 0
    TypeFunction *tfeq;
    {
        Scope sc;
        Array *arguments = new Array;
        Parameter *arg = new Parameter(In, tc, NULL, NULL);

        arguments->push(arg);
        tfeq = new TypeFunction(arguments, Type::tint32, 0, LINKd);
        tfeq = (TypeFunction *)tfeq->semantic(0, &sc);
    }
#endif

    s = search_function(sd, Id::tohash);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {   fd = fdx->overloadExactMatch(tftohash);
        if (fd)
            dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
        else
            //fdx->error("must be declared as extern (D) uint toHash()");
            dtdword(pdt, 0);
    }
//.........这里部分代码省略.........