mirror of https://github.com/golang/go.git
32 lines
985 B
Go
32 lines
985 B
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package lsp
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import (
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"context"
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"golang.org/x/tools/internal/event"
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"golang.org/x/tools/internal/lsp/debug/tag"
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"golang.org/x/tools/internal/lsp/protocol"
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"golang.org/x/tools/internal/lsp/source"
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)
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func (s *Server) signatureHelp(ctx context.Context, params *protocol.SignatureHelpParams) (*protocol.SignatureHelp, error) {
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snapshot, fh, ok, release, err := s.beginFileRequest(ctx, params.TextDocument.URI, source.Go)
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defer release()
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if !ok {
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return nil, err
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}
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info, activeParameter, err := source.SignatureHelp(ctx, snapshot, fh, params.Position)
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if err != nil {
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event.Error(ctx, "no signature help", err, tag.Position.Of(params.Position))
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return nil, nil
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}
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return &protocol.SignatureHelp{
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Signatures: []protocol.SignatureInformation{*info},
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ActiveParameter: float64(activeParameter),
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}, nil
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}
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