rewrite in go

vendor/github.com/pelletier/go-toml/v2/strict.go

@@ -0,0 +1,107 @@
+package toml
+
+import (
+	"github.com/pelletier/go-toml/v2/internal/danger"
+	"github.com/pelletier/go-toml/v2/internal/tracker"
+	"github.com/pelletier/go-toml/v2/unstable"
+)
+
+type strict struct {
+	Enabled bool
+
+	// Tracks the current key being processed.
+	key tracker.KeyTracker
+
+	missing []unstable.ParserError
+}
+
+func (s *strict) EnterTable(node *unstable.Node) {
+	if !s.Enabled {
+		return
+	}
+
+	s.key.UpdateTable(node)
+}
+
+func (s *strict) EnterArrayTable(node *unstable.Node) {
+	if !s.Enabled {
+		return
+	}
+
+	s.key.UpdateArrayTable(node)
+}
+
+func (s *strict) EnterKeyValue(node *unstable.Node) {
+	if !s.Enabled {
+		return
+	}
+
+	s.key.Push(node)
+}
+
+func (s *strict) ExitKeyValue(node *unstable.Node) {
+	if !s.Enabled {
+		return
+	}
+
+	s.key.Pop(node)
+}
+
+func (s *strict) MissingTable(node *unstable.Node) {
+	if !s.Enabled {
+		return
+	}
+
+	s.missing = append(s.missing, unstable.ParserError{
+		Highlight: keyLocation(node),
+		Message:   "missing table",
+		Key:       s.key.Key(),
+	})
+}
+
+func (s *strict) MissingField(node *unstable.Node) {
+	if !s.Enabled {
+		return
+	}
+
+	s.missing = append(s.missing, unstable.ParserError{
+		Highlight: keyLocation(node),
+		Message:   "missing field",
+		Key:       s.key.Key(),
+	})
+}
+
+func (s *strict) Error(doc []byte) error {
+	if !s.Enabled || len(s.missing) == 0 {
+		return nil
+	}
+
+	err := &StrictMissingError{
+		Errors: make([]DecodeError, 0, len(s.missing)),
+	}
+
+	for _, derr := range s.missing {
+		derr := derr
+		err.Errors = append(err.Errors, *wrapDecodeError(doc, &derr))
+	}
+
+	return err
+}
+
+func keyLocation(node *unstable.Node) []byte {
+	k := node.Key()
+
+	hasOne := k.Next()
+	if !hasOne {
+		panic("should not be called with empty key")
+	}
+
+	start := k.Node().Data
+	end := k.Node().Data
+
+	for k.Next() {
+		end = k.Node().Data
+	}
+
+	return danger.BytesRange(start, end)
+}