[cfe-dev] implicit int rule for c89

[Rong, Hongbo]

Thanks! Are you aware of any rule (or code correction in clang) that can automatically add a type (or correct a type) to a variable? Any example and command line?
From: James Dennett [mailto:james.dennett at gmail.com]
Sent: Sunday, December 14, 2014 10:32 PM
To: Rong, Hongbo
Cc: cfe-dev at cs.uiuc.edu
Subject: Re: [cfe-dev] implicit int rule for c89

On Sun, Dec 14, 2014 at 10:21 PM, Rong, Hongbo <hongbo.rong at intel.com<mailto:hongbo.rong at intel.com>> wrote:
b.c:
int main() {
  a = 1;
  return a;
}

clang.exe -std=c89 b.c
b.c:2:3: error: use of undeclared identifier 'a'
  a = 1;
  ^
b.c:3:10: error: use of undeclared identifier 'a'
  return a;
         ^
2 errors generated.

For c89, why variable a is not made as an implicit int?


Because that's not what C89 says.  "implicit int" was for functions, not variables.

-- James



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