/*** Parse from zero-level ***/
void Parser::parse()
{
if(hasTokens() && peekToken().getType() == T_EOL)
parseSeparation();
while(hasTokens())
{
// if(peekToken().getType() == T_PROC)
// parseProcedureDefinition();
// else if(peekToken().getType() == T_FUN)
// parseFunctionDefinition();
// else
if(peekToken().getType() == T_PROC)
{
parseProcedure();
parseSeparation();
}
else if(peekToken().getType() == T_FUN)
{
parseFunction();
parseSeparation();
}
else
{
list->pushNode(parseStatement());
parseSeparation();
}
}
// VariableManager manager;
}
//lead into the program
void Parser::parseBlock()
{
++it;
switch (it->tag)
{
case CONSTANT:
parseConstant();
parseBlock();
break;
case VAR:
parseVariables();
parseBlock();
break;
case TYPE:
parseType();
parseBlock();
break;
case FUNCTION:
parseFunction();
parseBlock();
break;
case PROCEDURE:
parseProcedure();
parseBlock();
break;
case BEGIN:
{
shared_ptr<Statement> block =
parseStmtList(currNode == root ? FINISH : END);
//root的block与函数的block
if (currNode != root)
{
(static_pointer_cast<FunctionStmt>(currNode))->body=block;
}
else
{
block->value.value = "__Main__";
currNode->addNode(block);
}
bool tmp=it->tag == FINISH || it->tag == END;
if (it->tag == END)
{
it++;
match(SEMI);
}
}
break;
}
}
