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It allows you to check type information at compile time. It will cause a compilation failure and produce an error message that in most IDE's be caught and displayed in the IDE's error window. static_assert (sizeof (int) == 4,"int should be 4 bytes"); Note the C1X standard, defines static_assert as an alias for the _Static_assert keyword in assert.h, but that is less portable to use currently. UPDATE 9 Nov 2012: Stephen Pitts mentioned that extra braces are required to support putting the STATIC_ASSERT () right after a case statement. In C++, static asserts are either part of the standard (C++0x) or templates that need to be evaluated at compile-time, so they can guarantee the assertion.

Static assert

It allows you to check type information at compile time. It will cause a compilation failure and produce an error message that in most IDE's be caught and displayed in the IDE's error window. static_assert (sizeof (int) == 4,"int should be 4 bytes"); A static assertion is one that is checked at compile time, not run time. The condition must be a constant expression, and if false will result in a compiler error.

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Parameters. booleanExpression.

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If static_assert is going to be in the next C++, and possibly in the next C, naming one's macro the same virtually guarantees incompatibility with these upcoming standards. Better to name it something different, like STATIC_ASSERT. static_assert (constant-expression, string-literal); static_assert (constant-expression); // Visual Studio 2017 and later 앞의 constant-expression 부분은 bool값으로 return 되어야 한다. 이 부분이 false 일 때, 컴파일러가 string-literal를 표시하게 된다. static_assert关键字，用来做编译期间的断言，因此叫做静态断言。语法: static_assert(常量表达式，提示字符串)。参数描述: 如果第一个参数常量表达式的值为false，会产生一条编译错误，错误位置就是该static_assert语句所在行，第二个参数就是错误提示字符串。 2021-04-07 · The static keyword is used to create variables that are visible to only one function. However unlike local variables that get created and destroyed every time a function is called, static variables persist beyond the function call, preserving their data between function calls.

Unlike previous example, now the the function “fun” do not have “constexpr” keyword. Therefore, compiler shall not be … A static_assert is a statement in C++ which tests for a condition like constant expression at the compile time of the program. If the condition results as 1 or true, the static_assert declaration has no effect. http://stackoverflow.com/questions/14621968/how-to-do-static-assert-with-macros.
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#include void Static application security testing is a methodology that analyzes source code to find security vulnerabilities, also known as white box testing.
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Static assert is used to make assertions at compile time. When the static assertion fails, the program simply doesn't compile. This is useful in different situations, like, for example, if you implement some functionality by code that critically depends on unsigned int object having exactly 32 bits. 2021-01-30 · However, static_assert is evaluated by the compiler when it's compiling the program. This means static_assert can be placed anywhere in the program, even outside of functions, since it doesn't have to be within the path of execution.