expr_t parse_op_expr(tokenizer_t t)
{
// struct token tok = cur_tok(t);
expr_t expr;
if(cur_tok(t).kind == TOK_BANG){
eat_it(t, TOK_BANG);
expr = parse_unary_expr(t);
return mk_expr_un_op(t->filename, t->line, op_kind_logneg, expr);
}else if(cur_tok(t).kind == TOK_PLUS){
eat_it(t, TOK_PLUS);
expr = parse_unary_expr(t);
return mk_expr_un_op(t->filename, t->line, op_kind_un_plus, expr);
}else if(cur_tok(t).kind == TOK_MINUS){
eat_it(t, TOK_MINUS);
expr = parse_unary_expr(t);
return mk_expr_un_op(t->filename, t->line, op_kind_un_minus, expr);
}else{
syntax_error(t, "error: parse_op_expr (expected TOK_BANG, TOK_PLUS, TOK_MINUS)");
return NULL;
// exit
}
// }
}
expr_t parse_unary_expr(tokenizer_t t) {
char * filename = cur_tok(t).filename;
int line = cur_tok(t).line_num;
char * f =(char *)safe_malloc(sizeof(char) * 50) ;
if(cur_tok(t).kind == TOK_INT_LITERAL) {
strcpy(f, cur_tok(t).num);
f = (char *)realloc(f, sizeof(char) * strlen(f) + 1);
eat_it(t, TOK_INT_LITERAL);
return mk_expr_int_literal(filename, line, f);
}
else if(cur_tok(t).kind == TOK_ID) {
strcpy(f, parse_identifier(t));
f = (char *)realloc(f, sizeof(char) * strlen(f) + 1);
if(cur_tok(t).kind == TOK_LPAREN) {
eat_it(t, TOK_LPAREN);
expr_list_t args = parse_arg_expr_list(t);
eat_it(t, TOK_RPAREN);
return mk_expr_call(filename, line, f, args);
}
else {
return mk_expr_id(filename, line, f);
}
}
else if(cur_tok(t).kind == TOK_LPAREN) {
eat_it(t, TOK_LPAREN);
expr_t e = parse_expr(t);
eat_it(t, TOK_RPAREN);
return mk_expr_paren(filename, line, e);
}
else if((cur_tok(t).kind == TOK_PLUS)|(cur_tok(t).kind == TOK_MINUS)|(cur_tok(t).kind == TOK_BANG)) {
op_kind_t op = parse_unary_oper(t);
expr_t exp = parse_unary_expr(t);
return mk_expr_un_op(filename, line, op, exp);
}
else {
printf("exit_5\n");
exit(1);
}
}
