static void declarePredefines(void)
{
TreeNode *input;
TreeNode *output;
TreeNode *temp;
/* define "int input(void)" */
input = newDecNode(FuncDecK);
input->name = copyString("input");
input->functionReturnType = Integer;
input->expressionType = Function;
/* define "void output(int)" */
temp = newDecNode(ScalarDecK);
temp->name = copyString("arg");
temp->variableDataType = Integer;
temp->expressionType = Integer;
output = newDecNode(FuncDecK);
output->name = copyString("output");
output->functionReturnType = Void;
output->expressionType = Function;
output->child[0] = temp;
/* get input() and output() added to global scope */
insertSymbol("input", input, 0);
insertSymbol("output", output, 0);
}
static dec_node *declaration(void){
dec_node *decn = newDecNode();
if((decn->typeKey = match(TOKEN_TYPEKEY, CONSUME)) != NULL){
if((decn->id = match(TOKEN_IDENTIFIER, CONSUME)) != NULL);
if((decn->scol = match(TOKEN_SCOL, CONSUME)) != NULL)
return decn;
}
else if((decn->scol = match(TOKEN_SCOL, CONSUME)) != NULL)
return decn;
freeDec(decn);
return NULL;
}
