97 lines
1.6 KiB
V
97 lines
1.6 KiB
V
// Copyright (c) 2019-2021 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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fn (a any) toString()
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pub fn println(s any) {
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// Quickfix to properly print basic types
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// TODO: Add proper detection code for this
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JS.console.log(s.toString())
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}
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pub fn print(s any) {
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// TODO
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// $if js.node {
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JS.process.stdout.write(s.toString())
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// } $else {
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// panic('Cannot `print` in a browser, use `println` instead')
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// }
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}
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pub fn eprintln(s any) {
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JS.console.error(s.toString())
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}
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pub fn eprint(s any) {
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// TODO
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// $if js.node {
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JS.process.stderr.write(s.toString())
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// } $else {
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// panic('Cannot `eprint` in a browser, use `eprintln` instead')
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// }
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}
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// Exits the process in node, and halts execution in the browser
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// because `process.exit` is undefined. Workaround for not having
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// a 'real' way to exit in the browser.
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pub fn exit(c int) {
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JS.process.exit(c)
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js_throw('exit($c)')
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}
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pub fn unwrap(opt any) any {
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o := &Option(opt)
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if o.state != 0 {
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js_throw(o.err)
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}
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return opt
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}
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pub fn panic(s string) {
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eprintln('V panic: $s')
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exit(1)
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}
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struct Option {
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state byte
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err Error
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}
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pub struct Error {
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pub:
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msg string
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code int
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}
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pub fn (o Option) str() string {
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if o.state == 0 {
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return 'Option{ ok }'
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}
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if o.state == 1 {
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return 'Option{ none }'
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}
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return 'Option{ error: "$o.err" }'
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}
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pub fn error(s string) Option {
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return Option{
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state: 2
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err: {
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msg: s
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}
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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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state: 2
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err: {
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msg: s
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code: code
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}
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}
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}
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