93 lines
1.8 KiB
Go
93 lines
1.8 KiB
Go
package typeutils
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// CTORS BEGIN
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func Ok[T any](value T) Result[T] {
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return Result[T]{value: value, err: nil}
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}
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func Err[T any](err error) Result[T] {
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return Result[T]{err: err}
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}
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func Err_t[T any](err error, x T) Result[T] {
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return Result[T]{err: err}
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}
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// CTORS END
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func (res Result[T]) Is_ok() bool { return res.err == nil }
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func (res Result[T]) Is_err() bool { return res.err != nil }
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func (res Result[T]) Has_value() bool { return res.Is_ok() }
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// UNWRAPPABLE INTERFACE
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func (res Result[T]) Expect(msg string) T {
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if res.err == nil {
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return res.value
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}
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panic(msg)
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}
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func (res Result[T]) Unwrap() T {
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if res.err == nil {
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return res.value
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}
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panic("Tried unwrapping a Result that had an error a value!")
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}
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func (res Result[T]) Unwrap_or(val T) T {
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if res.err == nil {
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return res.value
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}
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return val
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}
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func (res Result[T]) Unwrap_or_default() T {
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if res.err == nil {
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return res.value
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}
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var ret T
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return ret
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}
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func (res Result[T]) Unwrap_or_else(f func() T) T {
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if res.err == nil {
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return res.value
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}
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return f()
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}
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// UNWRAPPABLE INTERFACE
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// This function panic on Ok instead of Err
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func (res Result[T]) Expect_err(msg string) error {
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if res.err != nil {
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return res.err
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}
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panic(msg)
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}
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// This function panic on Ok instead of Err
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func (res Result[T]) Unwrap_err() error {
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if res.err != nil {
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return res.err
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}
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panic("Expect_err was called with an Ok value")
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}
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// transforms Result into Option, mapping Ok(v) to Some(v) and Err(e) to None
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func (res Result[T]) Ok() Optional[T] {
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if res.err == nil {
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return Optional[T]{value: res.value, present: true}
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}
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return Optional[T]{present: false}
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}
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// transforms Result into Option, mapping Err(e) to Some(e) and Ok(v) to None
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func (res Result[T]) Err() Optional[error] {
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if res.err != nil {
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return Optional[error]{value: res.err, present: true}
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}
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return Optional[error]{present: false}
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}
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