47 lines
846 B
V
47 lines
846 B
V
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module builtin
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struct Option {
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data [255]byte
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error string
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ecode int
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ok bool
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is_none bool
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}
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// `fn foo() ?Foo { return foo }` => `fn foo() ?Foo { return opt_ok(foo); }`
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fn opt_ok(data voidptr, size int) Option {
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if size >= 255 {
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panic('option size too big: $size (max is 255), this is a temporary limit')
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}
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res := Option {
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ok: true
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}
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C.memcpy(res.data, data, size)
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return res
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}
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// used internally when returning `none`
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fn opt_none() Option {
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return Option{ is_none: true }
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}
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pub fn error(s string) Option {
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return Option {
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error: s
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}
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}
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pub fn error_with_code(s string, code int) Option {
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return Option {
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error: s
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ecode: code
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}
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}
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