33 lines
772 B
Go
33 lines
772 B
Go
package grammar
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import "fmt"
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// Location indicates a position in a stream of runes 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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// Located wraps a value so that it has a Location attached to it.
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type Located[T any] struct {
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Location
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Value T
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}
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// Locate returns a Located instance combining the given values.
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func Locate[T any](l Location, v T) Located[T] {
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return Located[T]{l, v}
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}
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// LocatedError is an error related to a specific point within a stream of
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// runes.
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type LocatedError Located[error]
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func (e LocatedError) Error() string {
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return fmt.Sprintf("%d:%d: %v", e.Row, e.Col, e.Value)
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}
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