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RealView Compiler Reference Guide
Preface Introduction Compiler Command-line Options Language Extensions Preprocessor extensions
#assert #include_next #unassert #warning C99 language features available in C90 // comments Subscripting struct Flexible array members C99 language features available in C++ and C90 Variadic macros long long restrict Hex floats Standard C language extensions Constant expressions Array and pointer extensions Block scope function declarations Dollar signs in identifiers Top‑level declarations Benign redeclarations External entities Function prototypes Standard C++ language extensions ? operator Declaration of a class member friend Read/write constants Scalar type constants Type conversions Standard C and standard C++ language extensions Address of a register variable Arguments to functions Anonymous classes, structures and unions Assembler labels Empty declaration Hexadecimal floating‑point constants Incomplete enums Integral type extensions Label definitions Long float Non static local variables Structure, union, enum, and bitfield extensions GNU language extensions Alternate keywords asm keyword Case ranges Cast of a union Character escape sequences Compound literals Designated inits Conditionals Initializers Inline Extended lvalues Pointer arithmetic Statement expressions Unnamed fields Compiler-specific Features C and C++ Implementation Details Via File Syntax Standard C Implementation Definition Standard C++ Implementation Definition C and C++ Compiler Implementation Limits// comments
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| Home > Language Extensions > C99 language features available in C90 > // comments | |||
The character sequence // starts a one line comment, just as in C99 or C++.
// comments in C90 have the same semantics as // comments in C99.
New features of C99 in the Compiler User Guide.
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