mcpplibs.cmdline

// Consuming `mcpplibs.cmdline` through the published index.
//
// `parse_from` rather than `run(argc, argv)`: a test whose only assertion is
// "it linked" passes for a package that parses nothing. Parsing a string and
// checking what came out is the difference between testing the dependency
// edge and testing the dependency.
//
// The chains end in `.end()`, which is what commits the pending item and
// hands back the App — a builder is not an App, and the compiler says so.
import std;
import mcpplibs.cmdline;

using namespace mcpplibs;

int main() {
    int failures = 0;
    auto check = [&](bool ok, std::string_view what) {
        if (!ok) { std::println("FAIL: {}", what); ++failures; }
    };

    auto app = cmdline::App("tool")
        .version("1.0")
// …