--- /dev/null
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package lsp
+
+import (
+ "context"
+
+ "golang.org/x/tools/internal/lsp/protocol"
+ "golang.org/x/tools/internal/lsp/source"
+)
+
+func (s *Server) definition(ctx context.Context, params *protocol.DefinitionParams) ([]protocol.Location, error) {
+ snapshot, fh, ok, release, err := s.beginFileRequest(ctx, params.TextDocument.URI, source.Go)
+ defer release()
+ if !ok {
+ return nil, err
+ }
+ ident, err := source.Identifier(ctx, snapshot, fh, params.Position)
+ if err != nil {
+ return nil, err
+ }
+
+ var locations []protocol.Location
+ for _, ref := range ident.Declaration.MappedRange {
+ decRange, err := ref.Range()
+ if err != nil {
+ return nil, err
+ }
+
+ locations = append(locations, protocol.Location{
+ URI: protocol.URIFromSpanURI(ref.URI()),
+ Range: decRange,
+ })
+ }
+
+ return locations, nil
+}
+
+func (s *Server) typeDefinition(ctx context.Context, params *protocol.TypeDefinitionParams) ([]protocol.Location, error) {
+ snapshot, fh, ok, release, err := s.beginFileRequest(ctx, params.TextDocument.URI, source.Go)
+ defer release()
+ if !ok {
+ return nil, err
+ }
+ ident, err := source.Identifier(ctx, snapshot, fh, params.Position)
+ if err != nil {
+ return nil, err
+ }
+ identRange, err := ident.Type.Range()
+ if err != nil {
+ return nil, err
+ }
+ return []protocol.Location{
+ {
+ URI: protocol.URIFromSpanURI(ident.Type.URI()),
+ Range: identRange,
+ },
+ }, nil
+}