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Richard Feldman 2025-11-09 21:05:14 -05:00
parent 1c78bc039d
commit ff503008ea
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2 changed files with 14 additions and 10 deletions
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12
test/fx/platform/host.zig
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@ -190,10 +190,12 @@ fn platform_main() !void {
};
// Call the app's main! entrypoint
var unit_result: [0]u8 = undefined; // Result is {} which is zero-sized
// For a function with signature () => {}, the argument is an empty tuple (zero parameters)
// An empty tuple is zero-sized, so we pass a zero-sized value
// Note: Can't pass null here - Roc-generated code dereferences the pointer even for zero-sized types
var ret: [0]u8 = undefined; // Result is {} which is zero-sized
var args: [0]u8 = undefined;
roc__main_for_host(&roc_ops, @as(*anyopaque, @ptrCast(&unit_result)), @as(*anyopaque, @ptrCast(&args)));
// Note: although this is a function with no args and a zero-sized return value,
// we can't currently pass null pointers for either of these because Roc will
// currently dereference both of these eagerly even though it won't use either,
// causing a segfault if you pass null. This should be changed! Dereferencing
// garbage memory is obviously pointless, and there's no reason we should do it.
roc__main_for_host(&roc_ops, @as(*anyopaque, @ptrCast(&ret)), @as(*anyopaque, @ptrCast(&args)));
}