50 lines
902 B
Go
50 lines
902 B
Go
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package gg
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import "fmt"
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// Location indicates a position in a stream of bytes identified by column
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// within newline-separated rows.
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type Location struct {
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Row, Col int
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}
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func (l Location) errf(str string, args ...any) LocatedError {
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return LocatedError{l, fmt.Errorf(str, args...)}
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}
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func (l Location) locate() Location { return l }
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// LocatedError is an error related to a specific point within a decode gg
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// stream.
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type LocatedError struct {
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Location
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Err error
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}
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func (e LocatedError) Error() string {
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return fmt.Sprintf("%d:%d: %v", e.Row, e.Col, e.Err)
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}
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type locatable interface {
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locate() Location
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}
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type locatableRune struct {
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Location
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r rune
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}
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type locatableString struct {
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Location
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str string
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}
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type locatableSlice[T locatable] []T
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func (s locatableSlice[T]) locate() Location {
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if len(s) == 0 {
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panic("can't locate empty locatableSlice")
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}
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return s[0].locate()
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}
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