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provide roc_panic from javascript

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This commit is contained in:
Folkert 2021-09-20 23:11:24 +02:00
parent 8bab0f4637
commit a25d6c82b5
2 changed files with 3 additions and 12 deletions
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7
examples/hello-web/platform/host.js
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@ -11,12 +11,9 @@ async function roc_web_platform_run(wasm_filename, callback) {
const importObj = { const importObj = {
wasi_snapshot_preview1: { wasi_snapshot_preview1: {
proc_exit: (code) => { roc_panic: (_pointer, _tag_id) => {
if (code !== 0) { throw 'Roc panicked!';
console.error(`Exited with code ${code}`);
} }
exit_code = code;
},
}, },
env: { env: {
js_display_roc_string, js_display_roc_string,

8
examples/hello-web/platform/host.zig
View file

@ -43,13 +43,7 @@ export fn roc_dealloc(c_ptr: *c_void, alignment: u32) callconv(.C) void {
free(@alignCast(@alignOf(Align), @ptrCast([*]u8, c_ptr))); free(@alignCast(@alignOf(Align), @ptrCast([*]u8, c_ptr)));
} }
export fn roc_panic(c_ptr: *c_void, tag_id: u32) callconv(.C) void { // NOTE roc_panic is provided in the JS file, so it can throw an exception
_ = tag_id;
const stderr = std.io.getStdErr().writer();
const msg = @ptrCast([*:0]const u8, c_ptr);
stderr.print("Application crashed with message\n\n {s}\n\nShutting down\n", .{msg}) catch unreachable;
std.process.exit(0);
}
const mem = std.mem; const mem = std.mem;
const Allocator = mem.Allocator; const Allocator = mem.Allocator;