AstNode* Parser::parseStatement() {
if (isKeyword(currentTokenValue())) {
if (currentTokenValue() == "function") {
return parseFunction();
} else if (currentTokenValue() == "for") {
return parseFor();
} else if (currentTokenValue() == "if") {
return parseIf();
} else if (currentTokenValue() == "while") {
return parseWhile();
} else if (currentTokenValue() == "print") {
return parsePrint();
} else if (currentTokenValue() == "int") {
return parseDeclaration(VT_INT);
} else if (currentTokenValue() == "double") {
return parseDeclaration(VT_DOUBLE);
} else if (currentTokenValue() == "string") {
return parseDeclaration(VT_STRING);
} else if (currentTokenValue() == "return") {
return parseReturn();
} else {
cout << "unhandled keyword " << currentTokenValue() << endl;
assert(false);
return 0;
}
}
if (currentToken() == tLBRACE) {
return parseBlock(true);
}
if ((currentToken() == tIDENT) && isAssignment(lookaheadToken(1))) {
return parseAssignment();
}
return parseExpression();
}
// Declarations -> Decl | Decls
Declarations *parseDeclarations( FILE *source )
{
Token token = scanner(source);
int i;
Declaration decl;
Declarations *decls;
switch(token.type){
case FloatDeclaration:
case IntegerDeclaration:
decl = parseDeclaration(source, token);
decls = parseDeclarations(source);
return makeDeclarationTree( decl, decls );
case PrintOp:
case Alphabet:
for (i = strlen(token.tok) - 1; i >= 0; i--) {
ungetc(token.tok[i], source);
}
return NULL;
case EOFsymbol:
return NULL;
default:
printf("Syntax Error: Expect declarations %s\n", token.tok);
exit(1);
}
}
/***************************************************************
* Function: Parser::parseString()
* Purpose : Parse an XML input string
* Initial : Maxime Chevalier-Boisvert on October 20, 2008
****************************************************************
Revisions and bug fixes:
*/
Document Parser::parseString(const std::string& xmlString)
{
// Declare a variable for the current character index
size_t charIndex = 0;
// Declare a vector for the text positions in the streamlined input
PosVector positions;
// streamline the input raw xml string
std::string input = streamline(xmlString, positions);
// If the very verbose output flag is set
if (ConfigManager::s_veryVerboseVar) {
// Output the raw and streamlined input
std::cout << "Raw input: " << std::endl << xmlString;
std::cout << "Streamlined input: \"" << input << "\"" << std::endl;
}
// Parse the XML declaration, if present
Declaration* pDecl = parseDeclaration(input, charIndex, positions);
// Parse the XML element tree
Element* pTree = parseElement(input, charIndex, positions);
// Return the parsed XML document
return Document(pDecl, pTree);
}
void XMLDecoder::parse( XMLDocument* doc, const void* data, size_t len )
{
setData( data, len );
XMLNode* node = parseDeclaration();
doc->addNode( node );
while( ( node = parseNode() ) != NULL )
doc->addNode( node );
}
Ruleset* CssParser::parseRuleset () {
Ruleset* ruleset = NULL;
Declaration* declaration = NULL;
Selector* selector = new Selector();
if (!parseSelector(selector)) {
delete selector;
selector = NULL;
if (tokenizer->getTokenType() != Token::BRACKET_OPEN) {
return NULL;
}
} else if (tokenizer->getTokenType() != Token::BRACKET_OPEN) {
delete selector;
throw new ParseException(tokenizer->getToken()->str,
"a declaration block ('{...}')");
}
tokenizer->readNextToken();
ruleset = new Ruleset(selector);
skipWhitespace();
declaration = parseDeclaration();
if (declaration != NULL)
ruleset->addDeclaration(declaration);
while (tokenizer->getTokenType() == Token::DELIMITER) {
tokenizer->readNextToken();
skipWhitespace();
declaration = parseDeclaration();
if (declaration != NULL)
ruleset->addDeclaration(declaration);
}
if (tokenizer->getTokenType() != Token::BRACKET_CLOSED) {
throw new ParseException(tokenizer->getToken()->str,
"end of declaration block ('}')");
}
tokenizer->readNextToken();
skipWhitespace();
return ruleset;
}
// CONSTRUCTOR
ParsedDeclaration::ParsedDeclaration( std::string s ) {
typeSpec.clear();
varName.clear();
ndims = 0;
for (int ii = 0; ii < MAX_DIMS; ii++){
dims[ii] = 0;
}
lexer.load(s);
parseDeclaration();
}
Ptr<AST::Statement> Parser::parseStatement ()
{
AST::Statement *statement = nullptr;
statement = parseDeclaration();
if (statement == nullptr) {
statement = parseExpression();
}
return statement;
}
CqPrimvarToken::CqPrimvarToken(const char* token)
: m_class(class_invalid),
m_type(type_invalid),
m_count(-1),
m_name()
{
assert(token != 0);
const char* beginName = 0;
const char* endName = 0;
Ri::TypeSpec spec = parseDeclaration(token, &beginName, &endName);
m_name.assign(beginName, endName);
typeSpecToEqTypes(&m_class, &m_type, spec);
m_count = spec.arraySize;
}
//{ margin: auto; color: #cc0000; }
QVector<Declaration> CSSParser::parseDeclarations(){
consumeChar('{');
QVector<Declaration> declarations;
// while(peekChar() != '}'){
// declarations.append(parseDeclaration());
// }
while (true) {
consumeWhitespaceOrNewline();
if (peekChar() == '}') {
consumeChar();
break;
}
declarations.append(parseDeclaration());
}
return declarations;
}
CqPrimvarToken::CqPrimvarToken(const char* typeToken, const char* name)
: m_class(class_invalid),
m_type(type_invalid),
m_count(1),
m_name()
{
assert(typeToken != 0);
const char* beginName = 0;
Ri::TypeSpec spec = parseDeclaration(typeToken, &beginName);
if(beginName)
AQSIS_THROW_XQERROR(XqParseError, EqE_BadToken,
"invalid token: unexpected name \"" << beginName << "\" in type string \""
<< typeToken << "\"");
m_name = name;
typeSpecToEqTypes(&m_class, &m_type, spec);
m_count = spec.arraySize;
}
Declarations *parseDeclarations( FILE *source )//changed
{
Token token = scanner(source);
Declaration decl;
Declarations *decls;
switch(token.type){
case FloatDeclaration:
case IntegerDeclaration:
decl = parseDeclaration(source, token);
decls = parseDeclarations(source);
return makeDeclarationTree( decl, decls );
case PrintOp:
case Alphabet:
//ungetc(token.tok[0], source);
ungetstring(token.tok,source);
return NULL;
case EOFsymbol:
return NULL;
default:
printf("Syntax Error: Expect declarations %s\n", token.tok);
exit(1);
}
}
static PSmmAstNode parseExpressionStmt(PSmmParser parser) {
PSmmAstNode lval;
struct SmmFilePos fpos = parser->curToken->filePos;
parser->curToken->canBeNewSymbol = true;
lval = parseExpression(parser);
if (lval == &errorNode) {
if (findToken(parser, ';')) getNextToken(parser);
return &errorNode;
}
if (!lval->isIdent && (parser->curToken->kind == ':' || parser->curToken->kind == '=')) {
smmPostMessage(parser->msgs, errSmmOperandMustBeLVal, fpos);
if (findToken(parser, ';')) getNextToken(parser);
return &errorNode;
}
if (parser->curToken->kind == ':') {
lval = parseDeclaration(parser, lval);
} else if (parser->curToken->kind == '=') {
lval = parseAssignment(parser, lval);
}
if (lval) {
bool isJustIdent = lval->isIdent && (lval->kind != nkSmmCall) && (lval->kind != nkSmmError);
bool isAnyBinOpExceptLogical = lval->isBinOp && lval->kind != nkSmmAndOp && lval->kind != nkSmmOrOp;
if (isJustIdent || isAnyBinOpExceptLogical) {
smmPostMessage(parser->msgs, wrnSmmNoEffectStmt, lval->token->filePos);
if (isJustIdent) lval = NULL;
}
}
if (parser->prevToken->kind != '}' && (lval != &errorNode || parser->curToken->kind == ';')) {
expect(parser, ';');
}
return lval;
}
static int parse(ej_t *ep, int state, int flags)
{
a_assert(ep);
switch (state) {
/*
* Any statement, function arguments or conditional expressions
*/
case STATE_STMT:
if ((state = parseStmt(ep, state, flags)) != STATE_STMT_DONE &&
state != STATE_EOF && state != STATE_STMT_BLOCK_DONE &&
state != STATE_RET) {
state = STATE_ERR;
}
break;
case STATE_DEC:
if ((state = parseStmt(ep, state, flags)) != STATE_DEC_DONE &&
state != STATE_EOF) {
state = STATE_ERR;
}
break;
case STATE_EXPR:
if ((state = parseStmt(ep, state, flags)) != STATE_EXPR_DONE &&
state != STATE_EOF) {
state = STATE_ERR;
}
break;
/*
* Variable declaration list
*/
case STATE_DEC_LIST:
state = parseDeclaration(ep, state, flags);
break;
/*
* Function argument string
*/
case STATE_ARG_LIST:
state = parseArgs(ep, state, flags);
break;
/*
* Logical condition list (relational operations separated by &&, ||)
*/
case STATE_COND:
state = parseCond(ep, state, flags);
break;
/*
* Expression list
*/
case STATE_RELEXP:
state = parseExpr(ep, state, flags);
break;
}
if (state == STATE_ERR && ep->error == NULL) {
ejError(ep, T("Syntax error"));
}
return state;
}
