C++ parseType函数代码示例

/*
<mangled_name> ::= _Z <name> [<type> (if template params > 0)] <type>+
*/
static int parseMangledName(LargeStaticString &src, LargeStaticString &dest, demangle_t &data)
{
  START("MangledName");
  // Does the string begin with _Z?
  if (src[0] != '_' || src[1] != 'Z')
    END_FAIL("MangledName");
  src.stripFirst(2);
  if (parseName(src, dest, data) == FAIL)
    END_FAIL("MangledName");

  // HACK:: Bit of a hack here - we add the entire function name (foo::bar) to the substitution index,
  // when it shouldn't be. Here we decrement the number of substitutions so it is wiped.
  if (data.nSubstitutions)
    data.nSubstitutions --;
  
  // HACK:: OK here we go, hack again. We manually increase the data.nNameParseLevel member so
  // that our template parameters don't get accidentally overwritten.
  data.nNameParseLevel = 5;
  
  // If we have some template params we should expect a type next (for return type).
  LargeStaticString tmp; // Just completely ignore the return type.
  if (data.nTemplateParams > 0)
    if (parseType(src, tmp, data) == FAIL)
      END_FAIL("MangledName");
  
  data.nParams = 0;
  do
  {
    if (parseType(src, data.params[data.nParams], data) == FAIL)
      END_FAIL("MangledName");
    data.nParams++;
  } while (src.length() > 0);
  END_SUCCESS("MangledName");
}

		TestFunctionType parseFunctionType() {
			const auto returnType = parseType();
			
			assert(stream_.peek() == '(');
			stream_.consume();
			
			llvm::SmallVector<Type, 8> argumentTypes;
			
			while (stream_.peek() != ')' && stream_.peek() != '.') {
				argumentTypes.push_back(parseType());
				assert(stream_.peek() == ',' || stream_.peek() == ')');
				if (stream_.peek() == ',') {
					stream_.consume();
				}
			}
			
			llvm::SmallVector<Type, 8> varArgsTypes;
			const bool isVarArg = (stream_.peek() == '.');
			if (isVarArg) {
				varArgsTypes = parseVarArgsTypes();
			}
			
			assert(stream_.peek() == ')');
			stream_.consume();
			
			return TestFunctionType(FunctionType(returnType,
			                                     argumentTypes,
			                                     isVarArg),
			                        varArgsTypes);
		}

/*
<function_type> ::= F [Y] <type> <type>+ E
*/
static int parseFunctionType(LargeStaticString &src, LargeStaticString &dest, demangle_t &data)
{
  START("FunctionType");
  
  // Should start with an 'F'.
  if (src[0] != 'F')
    END_FAIL("FunctionType");
  
  src.stripFirst(1);
  // Do we have a 'Y'?
  if (src[0] == 'Y')
    src.stripFirst(1); // Ignore it.
  
  // Return type.
  if (parseType(src, dest, data) == FAIL)
    END_FAIL("FunctionType");
  
  dest += " ()(";
  bool bIsFirst = true;
  do
  {
    if (bIsFirst)
      bIsFirst = false;
    else
      dest += ", ";
    if (parseType(src, dest, data) == FAIL)
      END_FAIL("FunctionType");
  } while (src[0] != 'E');
  
  dest += ")";
  src.stripFirst(1);
  END_SUCCESS("FunctionType");
}

// like parseFunction, but never aborts with an error
bool Moc::parseMaybeFunction(FunctionDef *def)
{
    def->type = parseType();
    if (def->type.name.isEmpty())
        return false;
    bool scopedFunctionName = false;
    if (test(LPAREN)) {
        def->name = def->type.name;
        scopedFunctionName = def->type.isScoped;
        def->type = Type("int");
    } else {
        Type tempType = parseType();;
        while (!tempType.name.isEmpty() && lookup() != LPAREN) {
            if (def->type.name == "QT_MOC_COMPAT" || def->type.name == "QT3_SUPPORT")
                def->isCompat = true;
            else if (def->type.name == "Q_INVOKABLE")
                def->isInvokable = true;
            else if (def->type.name == "Q_SCRIPTABLE")
                def->isInvokable = def->isScriptable = true;
            else if (def->type.name == "Q_SIGNAL")
                def->isSignal = true;
            else if (def->type.name == "Q_SLOT")
                def->isSlot = true;
            else {
                if (!def->tag.isEmpty())
                    def->tag += ' ';
                def->tag += def->type.name;
            }
            def->type = tempType;
            tempType = parseType();
        }
        if (!test(LPAREN))
            return false;
        def->name = tempType.name;
        scopedFunctionName = tempType.isScoped;
    }

    // we don't support references as return types, it's too dangerous
    if (def->type.referenceType == Type::Reference)
        def->type = Type("void");

    def->normalizedType = normalizeType(def->type.name);

    if (!test(RPAREN)) {
        parseFunctionArguments(def);
        if (!test(RPAREN))
            return false;
    }
    def->isConst = test(CONST);
    if (scopedFunctionName
        && (def->isSignal || def->isSlot || def->isInvokable)) {
        QByteArray msg("parsemaybe: Function declaration ");
        msg += def->name;
        msg += " contains extra qualification. Ignoring as signal or slot.";
        warning(msg.constData());
        return false;
    }
    return true;
}

static PSmmAstNode parseFuncParams(PSmmParser parser, PSmmAstParamNode firstParam) {
	assert(firstParam != NULL);
	assert(parser->curToken->kind == ':');

	getNextToken(parser); //skip ':'

	PSmmTypeInfo typeInfo = parseType(parser);
	if (typeInfo->kind == tiSmmUnknown && !findEitherToken(parser, ',', ')')) return &errorNode;

	int paramCount = 1;
	firstParam->kind = nkSmmParamDefinition;
	firstParam->type = typeInfo;
	firstParam->isIdent = true;
	firstParam->level = parser->curScope->level + 1;
	ibsDictPush(parser->idents, firstParam->token->repr, firstParam);

	PSmmAstParamNode param = firstParam;

	while (parser->curToken->kind == ',') {
		getNextToken(parser);
		PSmmToken paramName = expect(parser, tkSmmIdent);
		if (!paramName) {
			findEitherToken(parser, ',', ')');
			continue;
		}
		if (!expect(parser, ':')) {
			findEitherToken(parser, ',', ')');
			continue;
		}
		PSmmTypeInfo paramTypeInfo = parseType(parser);
		if (paramTypeInfo->kind == tiSmmUnknown) {
			findEitherToken(parser, ',', ')');
		}
		PSmmAstParamNode newParam = ibsDictGet(parser->idents, paramName->repr);
		if (newParam) {
			if (newParam->level == parser->curScope->level + 1) {
				smmPostMessage(parser->msgs, errSmmRedefinition, paramName->filePos, paramName->repr);
				continue;
			} else if (!newParam->isIdent) {
				const char* tokenStr = nodeKindToString[newParam->kind];
				smmPostMessage(parser->msgs, errSmmIdentTaken, paramName->filePos, paramName->repr, tokenStr);
				continue;
			}
		}
		paramCount++;
		newParam = smmNewAstNode(nkSmmParam, parser->a);
		newParam->isIdent = true;
		newParam->level = parser->curScope->level + 1;
		newParam->token = paramName;
		newParam->type = paramTypeInfo;
		ibsDictPush(parser->idents, paramName->repr, newParam);
		param->next = newParam;
		param = newParam;
	}

	firstParam->count = paramCount;

	return (PSmmAstNode)firstParam;
}

static void parseInherit (tokenInfo *const token)
{
    Assert (isKeyword (token, KEYWORD_inherit));
#ifdef TYPE_REFERENCE_TOOL
    readToken (token);
    while (isType (token, TOKEN_IDENTIFIER))
    {
        parseType (token);
        if (isType (token, TOKEN_KEYWORD))
        {
            switch (token->keyword)  /* check for feature adaptation */
            {
            case KEYWORD_rename:
            case KEYWORD_export:
            case KEYWORD_undefine:
            case KEYWORD_redefine:
            case KEYWORD_select:
                findKeyword (token, KEYWORD_end);
                readToken (token);
            default:
                break;
            }
        }
    }
#else
    readToken (token);
    while (isType (token, TOKEN_IDENTIFIER))
    {
        parseType (token);
        switch (token->keyword)  /* check for feature adaptation */
        {
        case KEYWORD_rename:
            parseRename (token);
            if (isKeyword (token, KEYWORD_end))
                readToken (token);
            break;

        case KEYWORD_export:
        case KEYWORD_undefine:
        case KEYWORD_redefine:
        case KEYWORD_select:
            findKeyword (token, KEYWORD_end);
            readToken (token);
            break;

        case KEYWORD_end:
            readToken (token);
            break;

        default:
            break;
        }
    }
#endif
}

void esvg::Dimension::set(std::string _configX, std::string _configY) {
	m_data.setValue(0,0);
	m_type = esvg::distance_pixel;
	enum distance type = esvg::distance_pixel;
	// First Parse X
	enum distance typeX = parseType(_configX);
	float valueX = etk::string_to_float(_configX);
	// Second Parse Y
	enum distance typeY = parseType(_configY);
	float valueY = etk::string_to_float(_configY);
	// TODO : Check difference ...
	set(vec2(valueX, valueY), typeX);
	ESVG_VERBOSE(" config dimention : '" << _configX << "' '" << _configY << "'  == > " << *this );
}

static void parseGeneric (tokenInfo *const token, boolean declaration __unused__)
{
	unsigned int depth = 0;
#ifdef TYPE_REFERENCE_TOOL
	boolean constraint = FALSE;
#endif
	Assert (isType (token, TOKEN_OPEN_BRACKET));
	do
	{
		if (isType (token, TOKEN_OPEN_BRACKET))
		{
			++depth;
			readToken (token);
		}
		else if (isType (token, TOKEN_CLOSE_BRACKET))
		{
			--depth;
			readToken (token);
		}
#ifdef TYPE_REFERENCE_TOOL
		else if (declaration)
		{
			boolean advanced = FALSE;
			if (depth == 1)
			{
				if (isType (token, TOKEN_CONSTRAINT))
					constraint = TRUE;
				else if (isKeyword (token, KEYWORD_create))
					findKeyword (token, KEYWORD_end);
				else if (isType (token, TOKEN_IDENTIFIER))
				{
					if (constraint)
						advanced = parseType (token);
					else
						addGenericName (token);
					constraint = FALSE;
				}
			}
			else if (isType (token, TOKEN_IDENTIFIER))
				advanced = parseType (token);
			if (! advanced)
				readToken (token);
		}
#endif
		else
			parseType (token);
	} while (depth > 0 && ! isType (token, TOKEN_EOF));
}

PARSENODE_PTR SQLParser::parseCreate() {
    if (!startsCreate(nowReading)) {
        syntaxError(nowReading, "expect create!");
        return nullptr;
    }
    //LOG_TRACE(logger, "parse create statement.");

    PARSENODE_PTR createNode = PARSENODE_PTR(new ParseNode(CREATE));
    readToken();

    if (nowReading == TABLE) {
        createNode->children.emplace_back(new ParseNode(TABLE));
        readToken();
        
        createNode->children.push_back(parseIdentifier());
        
        expect(LEFT_BRACE);
        while (startsIdentifier(nowReading)) {
            PARSENODE_PTR id = parseIdentifier();
            //LOG_TRACE(logger, "parse id %s.", ((IdentifierNode*)id.get())->id_.c_str());
            PARSENODE_PTR type = parseType();
            if (nowReading == UNIQUE) {
                readToken();
                id->children.emplace_back(new ParseNode(UNIQUE));
            }
            expect(SLICE);
            id->children.push_back(type);
            createNode->children.push_back(id);
        }

        expect(PRIMARY);
        expect(KEY);
        expect(LEFT_BRACE);
        createNode->children.push_back(parseIdentifier());
        expect(RIGHT_BRACE);

        expect(RIGHT_BRACE);
    }
    else if (nowReading == INDEX) {
        createNode->children.emplace_back(new ParseNode(INDEX));
        readToken();

        PARSENODE_PTR indexNode = parseIdentifier();
        createNode->children.push_back(indexNode);
        expect(ON);
        PARSENODE_PTR tableNode = parseIdentifier();
        createNode->children.push_back(tableNode);
        expect(LEFT_BRACE);
        PARSENODE_PTR columnNode = parseIdentifier();
        createNode->children.push_back(columnNode);
        expect(RIGHT_BRACE);
    }
    else {
        syntaxError(nowReading, "expect table or index!");
        return nullptr;
    }

    expect(TERMINATOR);
    return createNode;
}

      /* parses a PLY element description */
      void parseElementDescr(std::stringstream& cin, std::list<std::string>& header) 
      {
        Element elt;
        std::string name; cin >> name;
        size_t num; cin >> num;
        mesh.order.push_back(name);
        elt.name = name;
        elt.size = num;
  
        /* parse all properties */
        while (!header.empty())
        {
          std::stringstream line(header.front()); 
          std::string tag; line >> tag;
          if (tag != "property") break;
          header.pop_front();
          
          Type ty = parseType(line);
          std::string name; line >> name;
          elt.type[name] = ty; 
          elt.properties.push_back(name);
        }

        mesh.elements[name] = elt;
      }

void VertexShader::parseAttributes()
{
    const char *hlsl = getHLSL();
    if (hlsl)
    {
        const char *input = strstr(hlsl, "// Attributes") + 14;

        while(true)
        {
            char attributeType[256];
            char attributeName[256];

            int matches = sscanf(input, "static %255s _%255s", attributeType, attributeName);

            if (matches != 2)
            {
                break;
            }

            mAttributes.push_back(Attribute(parseType(attributeType), attributeName));

            input = strstr(input, ";") + 2;
        }
    }
}

 void parseGenericParameters(Generic<T> *generic, const TypeContext &typeContext) {
     while (stream_.consumeTokenIf(E_SPIRAL_SHELL)) {
         auto &variable = stream_.consumeToken(TokenType::Variable);
         auto constraint = parseType(typeContext, TypeDynamism::GenericTypeVariables);
         generic->addGenericArgument(variable.value(), constraint, variable.position());
     }
 }

static void parseInherit (tokenInfo *const token)
{
	Assert (isKeyword (token, KEYWORD_inherit));
	readToken (token);
	while (isType (token, TOKEN_IDENTIFIER))
	{
		parseType (token);
		if (isType (token, TOKEN_KEYWORD))
		{
			switch (token->keyword)  /* check for feature adaptation */
			{
				case KEYWORD_rename:
					parseRename (token);
				case KEYWORD_export:
				case KEYWORD_undefine:
				case KEYWORD_redefine:
				case KEYWORD_select:
					if (findKeyword (token, KEYWORD_end))
						readToken (token);
					break;

				case KEYWORD_end:
					readToken (token);
					break;

				default: break;
			}
		}
		if (isType (token, TOKEN_SEMICOLON))
			readToken (token);
	}
}

		llvm::SmallVector<Type, 8> parseVarArgsTypes() {
			assert(stream_.peek() == '.');
			stream_.consume();
			assert(stream_.peek() == '.');
			stream_.consume();
			assert(stream_.peek() == '.');
			stream_.consume();
			
			assert(stream_.peek() == '(');
			stream_.consume();
			
			llvm::SmallVector<Type, 8> varArgsTypes;
			
			while (stream_.peek() != ')') {
				varArgsTypes.push_back(parseType());
				assert(stream_.peek() == ',' || stream_.peek() == ')');
				if (stream_.peek() == ',') {
					stream_.consume();
				}
			}
			
			assert(stream_.peek() == ')');
			stream_.consume();
			
			return varArgsTypes;
		}

DeclarationsPtr Parser::parseArgumentList()
{
    IdentifiersPtr identifiers = parseIdentifierList();
    if (m_errorCode > ErrorCodes::NoError) {
        return DeclarationsPtr();
    }

    if (!match(TokenType::Colon)) {
        reportError(ErrorCodes::ExpectedColon);
        return DeclarationsPtr();
    }

    TypePtr type = parseType();
    if (m_errorCode > ErrorCodes::NoError) {
        return DeclarationsPtr();
    }

    DeclarationsPtr declarations(new Declarations);
    for (std::vector<IdentifierPtr>::const_iterator i = identifiers->list.begin(); i != identifiers->list.end(); ++i) {
        DeclarationPtr declaration(new Declaration);
        declaration->id = *i;
        declaration->type = type;

        declarations->list.push_back(declaration);
    }

    DeclarationsPtr rest = parseArgumentList_r();
    if (rest) {
        declarations->list.insert(declarations->list.end(), rest->list.begin(), rest->list.end());
    }

    return declarations;
}