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Unlike the assert macro, static_assert runs at compile-time rather than at runtime. [8] The original implementation used template hacks. [ citation needed ] The static_assert macro takes in a constant expression that can be converted into a Boolean and a string literal; if the expression fails, the string literal is returned, otherwise, the ...
The new utility introduces a new way to test assertions at compile-time, using the new keyword static_assert. The declaration assumes this form: static_assert (constant-expression, error-message); Here are some examples of how static_assert can be used:
Unevaluated strings; Adding @, $, and ` to the basic character set; constexpr cast from void*; User-generated static_assert messages; Placeholder variables with no name; Pack indexing
In computer programming, specifically when using the imperative programming paradigm, an assertion is a predicate (a Boolean-valued function over the state space, usually expressed as a logical proposition using the variables of a program) connected to a point in the program, that always should evaluate to true at that point in code execution.
The variadic template feature of C++ was designed by Douglas Gregor and Jaakko Järvi [1] [2] and was later standardized in C++11. Prior to C++11, templates (classes and functions) could only take a fixed number of arguments, which had to be specified when a template was first declared.
The C++ Standard Library provides several generic containers, functions to use and manipulate these containers, function objects, generic strings and streams (including interactive and file I/O), support for some language features, and functions for common tasks such as finding the square root of a number.
Cppcheck is a static code analysis tool for the C and C++ programming languages. It is a versatile tool that can check non-standard code. [2] The creator and lead developer is Daniel Marjamäki. Cppcheck is free software under the GNU General Public License.
In C++11, this technique is known as generalized constant expressions (constexpr). [2] C++14 relaxes the constraints on constexpr – allowing local declarations and use of conditionals and loops (the general restriction that all data required for the execution be available at compile-time remains).