When the C99 extensions setting is on, the compiler recognizes extra keywords and the language features they represent. Extra C99 Keywords lists these keywords.
| This keyword or combination of keywords... | represents this language feature |
|---|---|
| _Bool | boolean data type |
| long long | integer data type |
| restrict | type qualifier |
| inline | function qualifier |
| _Complex | complex number data type |
| _Imaginary | imaginary number data type |