static NODE * print(void){
NODE * t = new_stmt(N_PRINT);
match(PRINT);
if (t != NULL)
t->child[0] = exp();
return t;
}
static NODE * read(void){
NODE * t = new_stmt(N_READ);
match(READ);
if ((t != NULL) &&(token.type == VAR)){
t->attribute.name = toHeap(token.attribute.name);
}
match(VAR);
return t;
}
static NODE * assign_stmt(void){
NODE * t = new_stmt(N_ASSIGN);
if ((t != NULL) && (token.type == VAR)){
t->attribute.name = toHeap(token.attribute.name);
}
match(VAR);
match(ASSIGN);
if (t != NULL){
t->child[0] = exp();
}
return t;
}
static NODE * while_stmt(void){
NODE * t = new_stmt(N_WHILE);
match(WHILE);
if(t != NULL){
t->child[0] = exp();
}
match(DO);
if(t != NULL) {
t->child[1] = stmt_list();
}
return t;
}
static NODE * if_stmt(void){
NODE * t = new_stmt(N_IF);
match(IF);
if (t != NULL){
t->child[0] = exp();
}
match(THEN);
if (t != NULL){
t->child[1] = stmt_list();
}
if (token.type == ELSE){
match(ELSE);
if (t!= NULL){
t->child[2] = stmt_list();
}
}
return t;
}
StatementPtr ClassRequireStatement::clone() {
ClassRequireStatementPtr new_stmt(new ClassRequireStatement(*this));
return new_stmt;
}
StatementPtr TraitRequireStatement::clone() {
TraitRequireStatementPtr new_stmt(new TraitRequireStatement(*this));
return new_stmt;
}
