Deprecate implicit `int` to `bool` conversion for integer literals

[Walter Bright]

On 11/14/2017 3:09 PM, H. S. Teoh wrote:
> I've been bitten before by things like this:
> 
> 	void myfunc(char ch) { ... }
> 	void myfunc(int i) { ... }
> 
> 	char c;
> 	int i;
> 
> 	myfunc(c);	// calls first overload
> 	myfunc('a');	// calls second overload (WAT)
> 	myfunc(i);	// calls second overload
> 	myfunc(1);	// calls second overload

I just tried:

   import core.stdc.stdio;
   void foo(char c) { printf("char\n"); }
   void foo(int c) { printf("int\n"); }
   void main() {
     enum int e = 1;
     foo(e);
     foo(1);
     foo('c');
   }

and it prints:

   int
   int
   char

I cannot reproduce your or Nick's error.