This is a header-only assertions library for C++. The intention is provide more general assertions that offer multiple improvements over the standard asserts. These include improved debug information where applicable, greater customization options, greater readability, and a collection of functions to utilize with assertions.

Usage

Including the header file via #include "fluassert.h" should be sufficient in order to make use of fluasserts. For example:

#include "fluassert.h"

int main() {
	int x = 1;
	fluassert(x, should.be, 0);
}

Outputs: FLUASSERT| example.cpp's main (line 5): x should be 0 - but is 1 before exiting the program early.

Optional Defines

There are several defines that can be used to change the behaviour of fluassert.

• NDEBUG can be defined in order to disable fluasserts
• FLUASSERT_NOABORT can be defined in order to continue program execution after a fluassert fails
• FLUASSERT_HANDLER(x) can be defined to determine how fluasserts are printed. By default this is std::cerr << (x) << '\n';
• FLUASSERT_PRESERVE_ASSERT can be defined in order to allow usage of assert.h alongside fluassert. Only matters when assert.h is included before fluassert.h, to avoid redefining the assert(x) macro.

Conditionals

There are several different conditionals that can be used in fluasserts. The format is fluassert(x, conditional, y, z, etc.).

• x should.be y -- checks if x == y
• x should.be_greater_than y -- checks if x > y
• x should.be_lesser_than y -- checks if x < y
• x should.be_greater_or_equal_to y -- checks if x >= y
• x should.be_lesser_or_equal_to y -- checks if x <= y
• x should.be_between y, z -- checks if y <= x <= z or z <= x <= y
• x should.be_positive -- checks if x > 0
• x should.be_negative -- checks if x < 0
• x should.contain y -- checks that x, as a container (std::set, std::unordered_set, std::map, std::unordered_map, std::vector, std::string) contains y as a value
• x should.contain_key y -- for std::map and std::unordered_map, does the same as should.contain
• x should.contain_value y -- for std::map and std::unordered_map, checks if the value exists within the map
• x should.begin_with y -- for std::string, checks if x begins with the character or string y
• x should.end_with y -- for std::string, checks if x ends with the character or string y
• x should.match_regex y -- for std::string, checks if x fully matches the regular expression y
• x should.contain_regex y -- for std::string, checks if x has a substring (potentially the full string) that matches the regular expression y
• x should.throw_error -- for a zero-argument function or lambda x, check if an exception gets thrown
• x should.be_size y -- for a container with .size(), check if its size is equal to y