v/vlib/builtin/js/option.v

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2020-02-03 05:00:36 +01:00
// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
2019-09-14 22:48:30 +02:00
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module builtin
struct Option {
data [255]byte
error string
ok bool
}
// `fn foo() ?Foo { return foo }` => `fn foo() ?Foo { return opt_ok(foo); }`
fn opt_ok(data voidptr, size int) Option {
if size >= 255 {
panic('option size too big')
}
res := Option {
ok: true
}
C.memcpy(res.data, data, size)
return res
}
pub fn error(s string) Option {
return Option {
error: s
}
}