Combine Cursor with State

test/readerat.go

@@ -7,7 +7,6 @@ import (
 	"io"
 
 	"git.codemonkeysoftware.net/b/gigaparsec"
-	"git.codemonkeysoftware.net/b/gigaparsec/cursor"
 	"github.com/shoenig/test"
 )
 
@@ -24,29 +23,6 @@ func ErrReaderAt(err error) io.ReaderAt {
 	return errReaderAt{err: err}
 }
 
-type errCursor[T any] struct {
-	err error
-	pos uint64
-}
-
-func (c errCursor[T]) Read([]T) (uint64, cursor.Cursor[T], error) {
-	return 0, c, c.err
-}
-
-func (c errCursor[T]) At(pos uint64) cursor.Cursor[T] {
-	c.pos = pos
-	return c
-}
-
-func (c errCursor[T]) Pos() uint64 {
-	return c.pos
-}
-
-// ErrCursor return a [cursor.Cursor] with a Read method that always returns err.
-func ErrCursor[T any](err error) cursor.Cursor[T] {
-	return errCursor[T]{err: err}
-}
-
 func StateIsAt[Input any](t test.T, s gigaparsec.State[Input], pos uint64) {
 	test.EqOp(t, pos, s.Pos(), test.Sprintf("expected parser state to be at position %d, got %d", pos, s.Pos()))
 }