compat.harfbuzz

// compat.harfbuzz — assert the shaper actually runs, and that the FreeType
// backend is compiled in rather than merely declared.
//
// Shaping needs no font file: hb_font_get_empty() gives a font whose glyphs
// are all .notdef, which is enough to prove the buffer pipeline (itemize →
// shape → read back infos/positions) is wired and returns one glyph per input
// codepoint. That is a real assertion -- if hb-ot-shape.cc had not been
// compiled into the amalgamation, glyph_count would be 0.
#include <hb.h>
#include <hb-ft.h>
import std;

int main() {
    bool ok = true;

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

// …