ortham / pseudosem

Permissive semantic version comparison in C++11.

Pseudosem

Pseudosem is a header-only version string comparison library, written in C++11, that conforms to the Semantic Versioning specification, and also supports extended version syntaxes:

• Leading zeroes (eg. 0.05.1)
• Arbitrary number of release version parts (eg. 1.2.3.4.5)
• Non-numeric release version parts (eg. 1.0a, 1.0z.5)
• Space, colon, hyphen and underscore prerelease separators (eg. 1.0.0 alpha:1-2_3)
• Case insensitivity

See Pseudosem's test suite for a full set of examples.

Usage

Example:

#include <pseudosem.h>
#include <iostream>

int main() {
    std::string v1("1.0.0");
    std::string v2("2.4.0");

    int result = pseudosem::compare(v1, v2);

    if (result < 0)
        std::cout << "v1 is an earlier version than v2";
    else if (result == 0)
        std::cout << "v1 is an equivalent version to v2";
    else
        std::cout << "v1 is a later version than v2";

    return 0;
}

Tests

Pseudosem has a test suite built on Google Test, and uses CMake to support cross-platform building. From the Pseudosem directory root:

mkdir build
cd build
cmake ..
./tests

pseudosem's Issues

Add a test for comparing empty and non-empty strings

This case came up here, and I'm not sure what Pseudosem's current behaviour is.

1.0.4b should be greater than 1.0.2

It isn't though, as pseudosem treats 4b as a pre-release version. Appending letters is a fairly common versioning method, so it should be supported. Reported via loot/loot#599.