compat.nanosvg

// compat.nanosvg — parse a real SVG document and rasterize it.
//
// This asserts three separate things the package must get right:
//   1. `<nanosvg.h>` / `<nanosvgrast.h>` resolve (include_dirs points at src/),
//   2. the parser's output is real geometry, not an empty image, and
//   3. the generated implementation TU is actually linked -- BOTH halves of it.
//      nsvgParse comes from nanosvg.h's implementation and nsvgRasterize from
//      nanosvgrast.h's, so if the package only instantiated one of the two this
//      test fails at link time rather than silently passing.
#include <nanosvg.h>
#include <nanosvgrast.h>
import std;

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

// …