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Compiler Reference Guide

Conventions and Feedback 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 Hexadecimal 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 Specialization of nonmember function templates 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 Nonstatic local variables Structure, union, enum, and bitfield extensions Compiler-specific Features C and C++ Implementation Details Semihosting ARMv6 SIMD Instruction Intrinsics Via File Syntax Standard C Implementation Definition Standard C++ Implementation Definition C and C++ Compiler Implementation Limits

Compiler Reference Guide

Incomplete enums

Incomplete enums

Forward declarations of enums are supported.

Show/hideExample

enum Incomplete_Enums_0;
int Incomplete_Enums_2 (enum Incomplete_Enums_0 * passon)
{
    return 0;
}
int Incomplete_Enums_1 (enum Incomplete_Enums_0 * passon)
{
    return Incomplete_Enums_2(passon);
}
enum Incomplete_Enums_0 { ALPHA, BETA, GAMMA };
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