dimgigov
e87985e879
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Desugar `is` to tag/value equality in bootstrap and selfhost so LIR no longer drops hIs as false. Resolve monomorphized Result/Option type names for `?` (_Tag/_Data). Call bux_exit(1) after Unwrap panic messages. Add is_operator example and document follow-up fixes.
60 lines
1.3 KiB
Plaintext
60 lines
1.3 KiB
Plaintext
module Std::Option {
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import Std::Io::{PrintLine};
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extern func bux_exit(code: int);
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enum Option<T> {
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Some(T),
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None,
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}
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func Option_NewSome<T>(value: T) -> Option<T> {
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let o: Option<T> = Option { tag: Option_Some };
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o.data.Some_0 = value;
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return o;
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}
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func Option_NewNone<T>() -> Option<T> {
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return Option { tag: Option_None };
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}
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func Option_IsSome<T>(o: Option<T>) -> bool {
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return o.tag == Option_Some;
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}
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func Option_IsNone<T>(o: Option<T>) -> bool {
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return o.tag == Option_None;
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}
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func Option_Unwrap<T>(o: Option<T>) -> T {
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if o.tag != Option_Some {
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PrintLine("panic: unwrap on None");
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bux_exit(1);
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}
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return o.data.Some_0;
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}
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func Option_UnwrapOr<T>(o: Option<T>, fallback: T) -> T {
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if o.tag == Option_Some {
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return o.data.Some_0;
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}
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return fallback;
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}
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func Option_Expect<T>(o: Option<T>, msg: String) -> T {
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if o.tag != Option_Some {
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PrintLine(msg);
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bux_exit(1);
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}
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return o.data.Some_0;
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}
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func Option_Or<T>(o: Option<T>, other: Option<T>) -> Option<T> {
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if o.tag == Option_Some {
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return o;
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}
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return other;
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}
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}
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