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gcc_extensions [2019/07/25 12:40] – [Nested functions] rpjdaygcc_extensions [2019/07/25 12:53] (current) – [Case ranges] rpjday
Line 49: Line 49:
 ==== Nonlocal gotos ==== ==== Nonlocal gotos ====
  
-Use ''__builtin_setjmp'' and ''__builtin_longjmp''.+Use ''%%__builtin_setjmp%%'' and ''%%__builtin_longjmp%%''. 
 + 
 +==== Constructing function calls ==== 
 + 
 +==== typeof ==== 
 + 
 +<code> 
 +#define max(a,b) \ 
 +  ({ typeof (a) _a = (a); \ 
 +      typeof (b) _b = (b); \ 
 +    _a > _b ? _a : _b; }) 
 +</code> 
 + 
 +==== Conditionals ==== 
 + 
 +Equivalent: 
 + 
 +<code> 
 +x ? x : y 
 +x ? : y 
 +</code> 
 + 
 +==== Non-constant initializers ==== 
 + 
 +==== Designated initializers ==== 
 + 
 +==== Case ranges ==== 
 + 
 +<code> 
 +case low ... high: 
 +</code> 
 + 
 +Don't forget spaces. 
 + 
 + 
  • gcc_extensions.1564058452.txt.gz
  • Last modified: 2019/07/25 12:40
  • by rpjday