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.
70 lines
1.6 KiB
Plaintext
70 lines
1.6 KiB
Plaintext
module Std::Result {
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import Std::Io::{PrintLine};
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extern func bux_exit(code: int);
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enum Result<T, E> {
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Ok(T),
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Err(E),
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}
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func Result_NewOk<T, E>(value: T) -> Result<T, E> {
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let r: Result<T, E> = Result { tag: Result_Ok };
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r.data.Ok_0 = value;
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return r;
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}
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func Result_NewErr<T, E>(msg: E) -> Result<T, E> {
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let r: Result<T, E> = Result { tag: Result_Err };
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r.data.Err_0 = msg;
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return r;
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}
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func Result_IsOk<T, E>(r: Result<T, E>) -> bool {
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return r.tag == Result_Ok;
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}
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func Result_IsErr<T, E>(r: Result<T, E>) -> bool {
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return r.tag == Result_Err;
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}
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func Result_Unwrap<T, E>(r: Result<T, E>) -> T {
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if r.tag != Result_Ok {
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PrintLine("panic: unwrap on Err");
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bux_exit(1);
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}
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return r.data.Ok_0;
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}
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func Result_UnwrapOr<T, E>(r: Result<T, E>, fallback: T) -> T {
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if r.tag == Result_Ok {
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return r.data.Ok_0;
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}
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return fallback;
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}
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func Result_Expect<T, E>(r: Result<T, E>, msg: String) -> T {
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if r.tag != Result_Ok {
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PrintLine(msg);
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bux_exit(1);
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}
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return r.data.Ok_0;
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}
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func Result_UnwrapErr<T, E>(r: Result<T, E>) -> E {
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if r.tag != Result_Err {
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PrintLine("panic: unwrap_err on Ok");
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bux_exit(1);
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}
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return r.data.Err_0;
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}
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func Result_Or<T, E>(r: Result<T, E>, other: Result<T, E>) -> Result<T, E> {
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if r.tag == Result_Ok {
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return r;
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}
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return other;
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}
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}
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