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Check that Slice has correct position after matching

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This commit is contained in:
Brandon Dyck
2024-09-09 15:00:17 -06:00
parent f75904ca93
commit 8943da5aee
2 changed files with 26 additions and 20 deletions
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23
gigaparsec.go
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@ -31,30 +31,27 @@ func (pe ParseError) Error() string {
return fmt.Sprintf("parse error: %d: %s", pe.Pos, pe.Got)
}
type State[T any] struct {
cursor cursor.Cursor[T]
func MakeState[In any](c cursor.Cursor[In]) State[In] {
return State[In]{cursor: c}
}
func (s State[T]) Cursor() cursor.Cursor[T] {
type State[In any] struct {
cursor cursor.Cursor[In]
}
func (s State[In]) Cursor() cursor.Cursor[In] {
return s.cursor
}
func (s State[T]) Read(dst []T) (n uint64, next State[T], err error) {
func (s State[In]) Read(dst []In) (n uint64, next State[In], err error) {
n, c, err := s.cursor.Read(dst)
return n, State[T]{cursor: c}, err
return n, State[In]{cursor: c}, err
}
func (s State[T]) Pos() uint64 {
func (s State[In]) Pos() uint64 {
return s.cursor.Pos()
}
func Parse[In, Out any](p Parser[In, Out], c cursor.Cursor[In]) (result Out, err error) {
st := State[In]{cursor: c}
var reply Result[In, Out]
_, reply, err = p(st)
return reply.Value, err
}
type Parser[In, Out any] func(State[In]) (consumed bool, reply Result[In, Out], err error)
func Return[In, Out any](value Out) Parser[In, Out] {