golang.org/x/tools/gopls@v0.15.3/internal/server/implementation.go (about)

     1  // Copyright 2019 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package server
     6  
     7  import (
     8  	"context"
     9  
    10  	"golang.org/x/tools/gopls/internal/file"
    11  	"golang.org/x/tools/gopls/internal/golang"
    12  	"golang.org/x/tools/gopls/internal/protocol"
    13  	"golang.org/x/tools/gopls/internal/telemetry"
    14  	"golang.org/x/tools/internal/event"
    15  	"golang.org/x/tools/internal/event/tag"
    16  )
    17  
    18  func (s *server) Implementation(ctx context.Context, params *protocol.ImplementationParams) (_ []protocol.Location, rerr error) {
    19  	recordLatency := telemetry.StartLatencyTimer("implementation")
    20  	defer func() {
    21  		recordLatency(ctx, rerr)
    22  	}()
    23  
    24  	ctx, done := event.Start(ctx, "lsp.Server.implementation", tag.URI.Of(params.TextDocument.URI))
    25  	defer done()
    26  
    27  	fh, snapshot, release, err := s.fileOf(ctx, params.TextDocument.URI)
    28  	if err != nil {
    29  		return nil, err
    30  	}
    31  	defer release()
    32  	if snapshot.FileKind(fh) != file.Go {
    33  		return nil, nil // empty result
    34  	}
    35  	return golang.Implementation(ctx, snapshot, fh, params.Position)
    36  }