mcpplibs.grpcgen

// Asserts the generated stubs exist, compile and carry the SERVICE — a
// protobuf-only run would produce echo.pb.* and no Echo::Service, so a
// half-configured codegen cannot pass this.
//
// HAVE_GRPC comes from this project's own cfg-gated cxxflags: the package is
// linux/macOS-only, so elsewhere this file is an empty main().
#ifdef HAVE_GRPC

#include <cstdio>
#include <string>

#include "echo.pb.h"
#include "echo.grpc.pb.h"

int main() {
    // The message half: a real generated type, round-tripped.
    echotest::EchoRequest req;
    req.set_text("mcpp");
    std::string wire;
    if (!req.SerializeToString(&wire)) return 1;
    echotest::EchoRequest back;
    if (!back.ParseFromString(wire)) return 1;
// …