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generator: contract-first C++ cdylib modules from --lidl

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--lidl x.lidl --backend cdylib with --impl-class/--impl-header now emits
the FULL set (C-ABI export wrapper + events + uniform glue) around the
named hand-written Qt-free impl class — the C++ mirror of declaring the
contract in .lidl and implementing the Rust trait. Without --impl-class
the glue-only mode is unchanged.
This commit is contained in:
Dario Gabriel Lipicar
2026-06-12 10:29:34 -03:00
parent da98412614
commit 9198abbc42
1 changed files with 29 additions and 10 deletions
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cpp-generator/main.cpp
+29 -10
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@@ -286,12 +286,15 @@ int main(int argc, char* argv[])
const int implClassIdx = args.indexOf("--impl-class");
const int implHeaderIdx = args.indexOf("--impl-header");
// Cdylib glue-only mode: with no --impl-class, emit just the
// uniform Qt-plugin glue over the common module-impl C ABI. The
// C exports come from the module's own language backend (e.g.
// the Rust SDK's lidl-gen --provider) — the glue is identical
// either way, it only knows the C symbols.
if (backend == "cdylib" && implClassIdx == -1) {
// Cdylib-from-LIDL (contract-first):
// - with no --impl-class: GLUE-ONLY — the C exports come from
// the module's own language backend (e.g. the Rust SDK's
// lidl-gen --provider); the glue only knows the C symbols.
// - with --impl-class/--impl-header: the FULL set — the C-ABI
// export wrapper around the named (hand-written, Qt-free)
// C++ impl class, plus the same uniform glue. The contract
// stays the .lidl; the author just implements the class.
if (backend == "cdylib") {
QFile f(lidlPath);
if (!f.open(QIODevice::ReadOnly | QIODevice::Text)) {
err << "Error: cannot read " << lidlPath << "\n";
@@ -314,10 +317,26 @@ int main(int argc, char* argv[])
: outputDir;
QDir().mkpath(genDirPath);
struct Out { QString file; QString content; };
const QList<Out> outs = {
{mod.name + "_cdylib_glue.h", lidlMakeCdylibGlueHeader(mod)},
{mod.name + "_cdylib_glue.cpp", lidlMakeCdylibGlueSource(mod)},
};
QList<Out> outs;
if (implClassIdx != -1) {
if (implClassIdx + 1 >= args.size()) {
err << "Error: --impl-class requires a class name\n";
return 1;
}
const QString implClass = args.at(implClassIdx + 1);
QString implHeader;
if (implHeaderIdx != -1 && implHeaderIdx + 1 < args.size())
implHeader = args.at(implHeaderIdx + 1);
else
implHeader = mod.name + "_impl.h";
outs.append({mod.name + "_module_impl.cpp",
lidlMakeModuleImplExports(mod, implClass, implHeader)});
if (!mod.events.isEmpty())
outs.append({mod.name + "_events_cdylib.cpp",
lidlMakeEventsSourceCdylib(mod, implClass, implHeader)});
}
outs.append({mod.name + "_cdylib_glue.h", lidlMakeCdylibGlueHeader(mod)});
outs.append({mod.name + "_cdylib_glue.cpp", lidlMakeCdylibGlueSource(mod)});
for (const Out& o : outs) {
const QString abs = QDir(genDirPath).filePath(o.file);
QFile of(abs);