45 expression is not an integer constant expression
extern定义的常量在Switch中报错“expression is not an integer ... Jul 9, 2017 · If you set the value of the constant in the .m, it is not visible by other translation units that only include the .h file. The value of the constant must be known at compile time to be able to be used in a case within a switch. Constant expressions - cppreference.com Feb 19, 2023 · Expressions General Value categories(lvalue, rvalue, xvalue) Order of evaluation(sequence points) Constant expressions Potentially-evaluated expressions Primary expressions Lambda expressions(C++11) Literals Integer literals Floating-point literals Boolean literals Character literalsincluding escape sequences
"static assertion expression is not an integral constant ... Sep 11, 2022 · The first argument to _Static_assert is just one context where constant integer expressions are required. That said, since Clang treats the same expression as an integer constant is most other contexts (see the test case below), I think the fact that it rejects it in _Static_assert should be considered a bug. With that let me reopen this report ...
Expression is not an integer constant expression
Expression is not an integer constant expression in iOS ... Jun 29, 2015 · The error expression is not an integer constant expression means just what it says: in a case, the value must be constant, as in, not a variable. You could change the declarations above the switch to be constants: const int match1=0; const int match2=1; Or you could use an enumeration. Or a #define. C compiler: missing diagnostics "expression is not an integer ... Jan 11, 2022 · expressions whose results are integer constants, _Alignof expressions, and floating constants that are the immediate operands of casts. Cast operators in an integer constant expression shall only convert arithmetic types to integer types, except as part of an operand to the sizeof or _Alignof operator. [Solved] Expression is not an integer constant expression ... Jun 7, 2022 · Solution 1. The error expression is not an integer constant expression means just what it says: in a case, the value must be constant, as in, not a variable. You could change the declarations above the switch to be constants: const int match1 =0; const int match2 =1; Or you could use an enumeration. Or a #define.
Expression is not an integer constant expression. What is an Integer constant expression in C programming? Aug 7, 2021 · An integer constant expression is an expression that consists only of * operators other than assignment, increment, decrement, function-call, or comma, except that cast operators can only cast arithmetic types to integer types integer constants enumeration constants character constants [Solved] Expression is not an integer constant expression ... Jun 7, 2022 · Solution 1. The error expression is not an integer constant expression means just what it says: in a case, the value must be constant, as in, not a variable. You could change the declarations above the switch to be constants: const int match1 =0; const int match2 =1; Or you could use an enumeration. Or a #define. C compiler: missing diagnostics "expression is not an integer ... Jan 11, 2022 · expressions whose results are integer constants, _Alignof expressions, and floating constants that are the immediate operands of casts. Cast operators in an integer constant expression shall only convert arithmetic types to integer types, except as part of an operand to the sizeof or _Alignof operator. Expression is not an integer constant expression in iOS ... Jun 29, 2015 · The error expression is not an integer constant expression means just what it says: in a case, the value must be constant, as in, not a variable. You could change the declarations above the switch to be constants: const int match1=0; const int match2=1; Or you could use an enumeration. Or a #define.
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