| 33 | }; |
| 34 | |
| 35 | void tutorial() { |
| 36 | TextPrinter tout; |
| 37 | ModuleGroup dummyLibGroup; |
| 38 | auto fAccess = make_smart<FsFileAccess>(); |
| 39 | |
| 40 | auto program = compileDaScript(getDasRoot() + SCRIPT_NAME, |
| 41 | fAccess, tout, dummyLibGroup); |
| 42 | if (program->failed()) { |
| 43 | tout << "Compilation failed:\n"; |
| 44 | for (auto & err : program->errors) { |
| 45 | tout << reportError(err.at, err.what, err.extra, |
| 46 | err.fixme, err.cerr); |
| 47 | } |
| 48 | return; |
| 49 | } |
| 50 | |
| 51 | Context ctx(program->getContextStackSize()); |
| 52 | if (!program->simulate(ctx, tout)) { |
| 53 | tout << "Simulation failed:\n"; |
| 54 | for (auto & err : program->errors) { |
| 55 | tout << reportError(err.at, err.what, err.extra, |
| 56 | err.fixme, err.cerr); |
| 57 | } |
| 58 | return; |
| 59 | } |
| 60 | |
| 61 | // =================================================================== |
| 62 | // PART A — Low-level: cast<T> + evalWithCatch |
| 63 | // |
| 64 | // This is the manual approach. You pack arguments into a vec4f |
| 65 | // array using cast<T>::from, call evalWithCatch, and unpack the |
| 66 | // return value with cast<T>::to. |
| 67 | // =================================================================== |
| 68 | printf("=== Part A: Low-level (cast + evalWithCatch) ===\n"); |
| 69 | |
| 70 | // ------------------------------------------------------------------- |
| 71 | // A1. int arguments, int return value |
| 72 | // ------------------------------------------------------------------- |
| 73 | { |
| 74 | auto fnAdd = ctx.findFunction("add"); |
| 75 | if (!fnAdd) { tout << "'add' not found\n"; return; } |
| 76 | |
| 77 | // Optional: verify the signature at runtime. |
| 78 | // verifyCall<ReturnType, ArgType1, ArgType2, ...> checks that the |
| 79 | // function's debug info matches the expected C++ types. |
| 80 | // This is slow (walks debug info), so do it once — not in a loop. |
| 81 | if (!verifyCall<int32_t, int32_t, int32_t>(fnAdd->debugInfo, dummyLibGroup)) { |
| 82 | tout << "'add' has wrong signature\n"; |
| 83 | return; |
| 84 | } |
| 85 | |
| 86 | vec4f args[2]; |
| 87 | args[0] = cast<int32_t>::from(17); |
| 88 | args[1] = cast<int32_t>::from(25); |
| 89 | |
| 90 | vec4f ret = ctx.evalWithCatch(fnAdd, args); |
| 91 | if (auto ex = ctx.getException()) { |
| 92 | tout << "exception in add: " << ex << "\n"; |
no test coverage detected