check_precedence.c

   1 /*
   2  * sparse/check_precedence.c
   3  *
   4  * Copyright (C) 20XX Your Name.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #include "smatch.h"
  11
  12 static int my_id;
  13
  14 static void match_condition(struct expression *expr)
  15 {
  16         if (expr->type != EXPR_BINOP)
  17                 return;
  18         if (expr->left->type == EXPR_COMPARE ||
  19                 expr->right->type == EXPR_COMPARE)
  20                 sm_msg("warning: do you want parens here?");
  21 }
  22
  23 static void match_binop(struct expression *expr)
  24 {
  25         if (expr->op != '&')
  26                 return;
  27         if (expr->left->op == '!')
  28                 sm_msg("warning: you probably want parens here.");
  29 }
  30
  31
  32 void check_precedence(int id)
  33 {
  34         my_id = id;
  35
  36         add_hook(&match_condition, CONDITION_HOOK);
  37         add_hook(&match_binop, BINOP_HOOK);
  38 }