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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

Label definitions

ARM Compiler toolchain v5.02 for µVision Compiler Reference
Home > Language Extensions > Label definitions

Label definitions

In Standard C and Standard C++, a statement must follow a label definition. In C and C++, a label definition can be followed immediately by a right brace.

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The compiler generates a warning if a label definition is followed immediately by a right brace.

Show/hideExample

void foo(char *p)
{
    if (p)
    {
        /* ... */
label:
    }
}
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