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206ec5b82a
Change-Id: Idc662385ed08bd62593ccd1d54afd3fa8c1a7d29 Reviewed-on: https://go-review.googlesource.com/c/tools/+/222558 Run-TryBot: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
30 lines
945 B
Go
30 lines
945 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/lsp/protocol"
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"golang.org/x/tools/internal/lsp/source"
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"golang.org/x/tools/internal/telemetry/event"
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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, err := s.beginFileRequest(params.TextDocument.URI, source.Go)
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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.Print(ctx, "no signature help", event.TagOf("At", params.Position), event.TagOf("Failure", err))
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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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