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The C++ standard recommends limits for various language constructs. The following is a list of cases where the Microsoft C++ compiler does not implement the recommended limits. The first number is the limit that is established in the ISO C++11 standard (INCITS/ISO/IEC 14882-2011[2012], Annex B) and the second number is the limit implemented by the Microsoft C++ compiler:
Nesting levels of compound statements, iteration control structures, and selection control structures - C++ standard: 256, Microsoft C++ compiler: depends on the combination of statements that are nested, but generally between 100 and 110.
Parameters in one macro definition - C++ standard: 256, Microsoft C++ compiler using
/Zc:preprocessor-:127 or using/Zc:preprocessor:32767.Arguments in one macro invocation - C++ standard: 256, Microsoft C++ compiler using
/Zc:preprocessor-:127 or using/Zc:preprocessor:32767.Characters in a character string literal or wide string literal (after concatenation) - C++ standard: 65536, Microsoft C++ compiler: 65535 single-byte characters, including the NULL terminator, and 32767 double-byte characters, including the NULL terminator.
Levels of nested class, structure, or union definitions in a single
struct-declaration-list- C++ standard: 256, Microsoft C++ compiler: 16.Member initializers in a constructor definition - C++ standard: 6144, Microsoft C++ compiler: at least 6144.
Scope qualifications of one identifier - C++ standard: 256, Microsoft C++ compiler: 127.
Nested
externspecifications - C++ standard: 1024, Microsoft C++ compiler: 9 (not counting the implicitexternspecification in global scope, or 10, if you count the implicitexternspecification in global scope.Template arguments in a template declaration - C++ standard: 1024, Microsoft C++ compiler: 2046.