Commit Graph

497 Commits

Author SHA1 Message Date
Jamal Carvalho 641b30b3f4 internal/lsp: add inlay hints for inferred type params
This will show inferred type information for generic function
call expressions.

Example:
SumNumbers<[string, int64]>(ints)

For golang/go#52343

Change-Id: I05595f236626e8fb3666af5160611e074e8265a4
Reviewed-on: https://go-review.googlesource.com/c/tools/+/412994
Reviewed-by: Suzy Mueller <suzmue@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
Run-TryBot: Jamal Carvalho <jamal@golang.org>
2022-06-21 17:15:02 +00:00
Suzy Mueller 1e14d994d8 internal/lsp: add inlay hints for composite literal types
Add inlay hints for composite literal types. This will show type
information for composite literals with no explicit types.

Example:
<struct {in, want string}>{"hello", "goodbye"}

For golang/go#52343

Change-Id: Ia1f03b82669387c864353b8033940759fa1128e7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411905
gopls-CI: kokoro <noreply+kokoro@google.com>
Run-TryBot: Suzy Mueller <suzmue@golang.org>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-06-17 18:37:13 +00:00
Suzy Mueller ebc084af8b internal/lsp: add inlay hints count to test summary
Change-Id: Ia74f4a43a114715a6011405bf70f9dfa269c3318
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411901
TryBot-Result: Gopher Robot <gobot@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Run-TryBot: Suzy Mueller <suzmue@golang.org>
2022-06-14 14:54:03 +00:00
Suzy Mueller c15c04572c internal/lsp: enable inlay hint tests
The change to implement inlay hints has been merged, so we need to
enable the tests.

Change-Id: I47e7ab343d0ab10283caac0a3d6677dd69c7504a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411898
Run-TryBot: Suzy Mueller <suzmue@golang.org>
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2022-06-13 21:07:50 +00:00
Jamal Carvalho c41ddceaa4 internal/lsp: include padding in inlay hint marker tests
The marker tests are updated to include padding values
when mapping inlay hints to text edits.

Change-Id: Ieb421088238c65b07abdad12763816d3d1e757c8
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411654
Run-TryBot: Jamal Carvalho <jamal@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
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Reviewed-by: Suzy Mueller <suzmue@golang.org>
2022-06-10 19:32:04 +00:00
Jamal Carvalho 5e48d261e2 internal/lsp: add inlay hints for composite literal names
For golang/go#52343.
For golang/vscode-go#1631.

Change-Id: I8fba5ddf0bd25ba0fc20f3305ce13868f426087c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411102
Run-TryBot: Jamal Carvalho <jamal@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Suzy Mueller <suzmue@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
2022-06-10 19:31:56 +00:00
Jamal Carvalho 83b0675060 internal/lsp: add inlay hints for constant values
For golang/go#52343.
For golang/vscode-go#1631.

Change-Id: Iaef0beab2837502f6428767f457d1da21848fcb6
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411101
Run-TryBot: Jamal Carvalho <jamal@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Suzy Mueller <suzmue@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
2022-06-10 19:31:37 +00:00
Jamal Carvalho ecc1479278 internal/lsp: add inlay hints for variable types
For golang/go#52343.
For golang/vscode-go#1631.

Change-Id: I94a1b3c389d8bfaa48754e28a52ef76c29eb6ead
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411100
Run-TryBot: Jamal Carvalho <jamal@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
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Reviewed-by: Suzy Mueller <suzmue@golang.org>
2022-06-10 19:31:24 +00:00
Jamal Carvalho 65c0181b23 internal/lsp: support textDocument/inlayHint for parameter names
This change implements support for textDocument/inlayHint and
adds inlay hints for parameter names.

For golang/go#52343.
For golang/vscode-go#1631.

Change-Id: I3f989838b86cef4fd2b4076cb6340010fff7c24c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411094
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Suzy Mueller <suzmue@golang.org>
Run-TryBot: Jamal Carvalho <jamal@golang.org>
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2022-06-10 19:31:11 +00:00
Suzy Mueller ad756c73a0 internal/lsp: initial test set up for inlay hints
Set up the tests for inlay hints. We test inlay hints by converting them to text edits
and verifying the output is as we expected it.

This change does not yet deal with making sure the server
settings are correct.

Change-Id: I136f971a87bf9936fd44047d45fe0a3f03c9164e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/411095
Run-TryBot: Suzy Mueller <suzmue@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
2022-06-09 20:27:29 +00:00
Marwan Sulaiman 13bcb69cfa internal/lsp/analysis/stubmethods: recognize *ast.CallExpr
This change makes it so that the stub methods analysis can recognize
errors happening to method and function call expressions that are being
passed a concrete type to an interface parameter. This way, a method stub CodeAction will appear at the call site.

Updates golang/go#37537

Change-Id: I886d53f06a85b9e5160d882aa742bb2b7fcea139
Reviewed-on: https://go-review.googlesource.com/c/tools/+/404655
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Reviewed-by: Suzy Mueller <suzmue@golang.org>
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2022-05-17 17:04:34 +00:00
Suzy Mueller 30fbd19e84 internal/lsp: fix fillstruct for structs with unsafe.Pointer
Provide a default value for unsafe.Pointer in fillstruct.

Fixes golang/go#52640

Change-Id: I10a1878fbf53b082f83f44e0ba2788ead14439d6
Reviewed-on: https://go-review.googlesource.com/c/tools/+/403535
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Reviewed-by: David Chase <drchase@google.com>
2022-05-05 17:08:12 +00:00
Muir Manders b44fad8412 lsp/completion: fix func literals with type params
Give placeholders for type params in func literal completions. For
example:

    func foo[T any](func(T) T) {}
    foo(<>)

Will now give "func(<T>) <T> {}" where <> denotes a placeholder.

Change-Id: Iadde73ed6b88e1410c28dfa33a20ab6a51235c93
Reviewed-on: https://go-review.googlesource.com/c/tools/+/400616
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2022-04-26 14:19:52 +00:00
Muir Manders 5bb9a5ecb1 lsp/completion: fix literal completions with type params
In cases like:

    type foo[T any] struct{}
    func bar[T any](foo[T]) {}

    bar[int](<A>)
    bar(<B>)

At <A> we will now offer "foo[int]{}". At <B> we will now offer a
snippet "foo[<T>]{}" which lets the user fill in the type arg.

Note that we have no knowledge of type inference, so you can be left
with superfluous type args after completion.

Change-Id: Ia7d63284f3317d9367864fdae3e3f9ae68fdff1a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/400615
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2022-04-26 02:30:39 +00:00
Muir Manders 0941294088 lsp/completion: further improve generic func arg ranking
In cases like:

    func foo[T int | string](T) {}
    foo[int](<>)

Previously at <> we would favor int and string candidates. This is
because go/types doesn't instantiate foo in this case (for some
reason). Work around the issue by using types.CheckExpr to re-check
the *ast.CallExpr.Fun. CheckExpr seems to do a better than a full type
check in the face of errors.

Updates golang/go#52291
Updates golang/go#52503

Change-Id: Ide436428f3232db2e06ea3cc22ea250edbf28685
Reviewed-on: https://go-review.googlesource.com/c/tools/+/400614
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
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2022-04-26 02:29:50 +00:00
Muir Manders fa7afc95f2 lsp/completion: improve generic func arg ranking
In cases like:

    func foo[A int|string](a A) {}

    foo[_](<>)

We now prefer ints and strings at <> by matching against the type
constraint. Note that even if "_" is replaced with "int", we still
prefer strings since the type checker doesn't seem to want to
instantiate foo unless the params check out.

Change-Id: I0e7acfef0775752a96fcfe23e7e2e3d939820eee
Reviewed-on: https://go-review.googlesource.com/c/tools/+/394017
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Reviewed-by: Suzy Mueller <suzmue@golang.org>
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2022-04-22 20:11:24 +00:00
pjw 1f763dfd2e internal/lsp: add semantic tokens for arrows in declarations
Fixes: golang.org/#52024

Change-Id: Ib79a839f9bdeaef1250925add69dea3ae32e1cae
Reviewed-on: https://go-review.googlesource.com/c/tools/+/397479
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
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2022-04-07 14:52:22 +00:00
Robert Findley 707beb0c63 internal/lsp/source: descend into fields and field lists in qualifyExpr
We do a lot of gymnastics to format var types, working around the lack
of alias tracking in go/types. As part of this, we clone and qualify
expressions. In this case, we were not qualifying identifiers that were
contained within fields or field lists.

Fix this by updating our expression traversal to include *ast.Field and
*ast.FieldList.

Fixes golang/go#50539

Change-Id: I6531c6a51aa402bd784778b8bedaa3dccee75af0
Reviewed-on: https://go-review.googlesource.com/c/tools/+/395678
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2022-03-25 15:26:50 +00:00
cuishuang 78ff15e680 tools: fix some typos
Change-Id: Iaad847631b9d5ee40558fcf9d51f4dfa99600e6b
GitHub-Last-Rev: 6fcb64f8d9a093e7bd949e5d28bd1176c27005c0
GitHub-Pull-Request: golang/tools#372
Reviewed-on: https://go-review.googlesource.com/c/tools/+/389595
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2022-03-24 22:24:35 +00:00
Robert Findley 2536df952b internal/lsp/source: include builtin name in hovered signature
Make builtin hover consistent with signatureHelp by reusing the
BuiltinSignature function. To simplify this, just precompute the builtin
signature. In later CLs we can pre-compute all signatures and eliminate
the signatureSource indirection.

Fixes golang/go#51811

Change-Id: I1babe64ba41f636bf455074a23ad6dac5539fb89
Reviewed-on: https://go-review.googlesource.com/c/tools/+/395294
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2022-03-24 20:26:13 +00:00
Muir Manders 1428e83b47 lsp/completion: fix bogus generic func conversion
For example:

    func foo[A int | float64](a A) A { return a }

    var _ int = fo<>

Previously at <> we would complete to "int(foo[A int|float64](a A))".
We added the int() type conversion because the returned type param A
was convertible to the expected "int" (i.e. both "int" and "float64"
can be converted). This is a premature suggestion, though, so fix by
suppressing such type conversions for type parameters.

Fixes golang/go#51780.

Change-Id: I63e3bd401a4d9927b9261659812c521c02e33d94
Reviewed-on: https://go-review.googlesource.com/c/tools/+/394016
Run-TryBot: Muir Manders <muir@mnd.rs>
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2022-03-22 17:37:31 +00:00
Muir Manders cbdab0337f lsp/completion: fix bogus type param candidate
In this example:

   func foo[A []int | []float64]() {}

   foo[<>]

When completing at <> you were getting the creative candidate
"[]int | []float64". This came from some code that makes the expected
type available as a candidate if it wouldn't otherwise be found by a
lexical search. I tweaked the code in this case to instead look at
each structural type in the type constraint rather than the constraint
as a whole. In the above example you now get the candidates "[]int"
and "[]float64".

Change-Id: Ib8e422df3009cb4253ec66005b4a53851564c4e1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/394015
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2022-03-22 17:37:20 +00:00
Muir Manders 3a6cbd67dd lsp/completion: improve completion for func type params
Now when instantiating a generic function, we prefer type names that
are assignable to the corresponding constraint. For example:

    func foo[A int|string]() {}

    foo[<>]()

At <> we prefer the type names "int" and "string". Previously we had
no preference at all.

Updates golang/go#51782.

Change-Id: I7ed39ffa2bc4c63e9d320f47a58e139251712bb3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/394014
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2022-03-22 17:36:59 +00:00
Robert Findley 5ea13d0d89 internal/lsp/source: move doc links to the bottom of hover
Fixes golang/go#36992

Change-Id: Ie4b749ba6c094c4559a9b3a3e5b63c0b4cbc5dcf
Reviewed-on: https://go-review.googlesource.com/c/tools/+/393642
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2022-03-18 13:39:41 +00:00
Robert Findley 6799a7ae92 internal/lsp/source: canonicalize objects in reference/rename requests
With generics, instantiated object may have differing pointer
identities. Fix references/rename requests for instantiated
methods/fields by using a canonical object identity of (pos, pkg, name).

Fixes golang/go#51672

Change-Id: I0021ca562b8a74dadb616cf6864cb0bdd0165cc3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/392480
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2022-03-15 13:54:34 +00:00
Robert Findley 03d333aa5e internal/lsp: add snippet completion for function type parameters
Fixes golang/go#51544

Change-Id: I29cf2a0fe878eed263b406ff3ebf1eaeffe10e4b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/390854
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2022-03-09 15:55:38 +00:00
Marwan Sulaiman 3ce772872c internal/lsp/source: support stubbing concrete type params
This CL adds support for generating method stubs for named types
that have type parameters and want to implement an interface.
See internal/lsp/testdata/stub/stub_generic_receiver.go for an example.
Note, this CL does not yet support type params on interface declarations.

Updates golang/go#37537

Change-Id: I2a2a18d364b2b489e2fbd8a74dfed88ae32d83b5
Reviewed-on: https://go-review.googlesource.com/c/tools/+/389654
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2022-03-03 22:52:16 +00:00
Robert Findley adcfb65266 internal/lsp/source: use the object as the hover source for type params
Use the type name object as the signature source for type parametes, as
it it efficiently formatted as "type parameter <name> <constraint>".

Fixes golang/go#51116

Change-Id: I3042ff248402dae833e3197c6ac320c2bd103c07
Reviewed-on: https://go-review.googlesource.com/c/tools/+/385018
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2022-02-17 17:38:34 +00:00
Robert Findley 45aeaf7b04 internal/lsp/source: improve the heuristics for linkable identifiers
We should not offer links to variable or type declarations in function
scope. Improve our heuristics to check that the declaration object is
actually reachable from the package scope.

Also push down handling of private import paths, so that the
HoverJSON.importPath field can be removed.

Change-Id: I6edb3be3c37f479667c838beb49f97e7167b47a1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/385016
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2022-02-17 17:38:11 +00:00
Robert Findley a317113201 internal/lsp/source: fix hover on generic type declarations
Hover on type specs was using the RHS of the type declaration and then
later rebuilding the declaration syntax. It was thereby dropping type
parameter lists.

Fix this by capturing the entire *TypeSpec for the signature, and
simply dropping comments from the node before formatting, so that they
are not duplicated.

Change-Id: I58724e65bd1f2aada1a5c04e4c61a059bed8357a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/385015
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2022-02-17 17:37:50 +00:00
Marwan Sulaiman 70c3ea29e2 gopls,internal/lsp: Implement method stubbing via CodeAction
This CL adds a quickfix CodeAction that detects "missing method"
compiler errors and suggests adding method stubs to the concrete
type that would implement the interface. There are many ways that
a user might indicate a concrete type is meant to be used as an interface.
This PR detects two types of those errors: variable declaration and function returns.
For variable declarations, things like the following should be detected:
1. var _ SomeInterface = SomeType{}
2. var _ = SomeInterface(SomeType{})
3. var _ SomeInterface = (*SomeType)(nil)
For function returns, the following example is the primary detection:
func newIface() SomeInterface {
	return &SomeType{}
}
More detections can be added in the future of course.

Fixes golang/go#37537

Change-Id: Ibb7784622184c9885eff2ccc786767682876b4d3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/274372
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2022-02-16 19:42:34 +00:00
fzipp 9b156eeb91 internal/lsp/source: provide full documentation of builtin types
This change adds support for full documentation of builtin types in the
hover info, consisting of the type declaration, a link to pkg.go.dev,
and the text of the doc comments in the `builtin` pseudo-package.

Full documentation for builtin functions was already supported.
Removes the special case for the `error` interface, which is not needed
and didn't provide the full documentation anyway, only the type
declaration.

The code has to determine the parent ast.GenDecl (which holds the doc
comments) for the ast.TypeSpec of a builtin type.

Fixes golang/go#50196

Change-Id: I51a054cd7e864300ba2e51152311744b7bcf3e0c
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2022-02-08 17:01:10 +00:00
Shoshin Nikita 727dfdb191 internal/lsp/source/completion: add conventional acronyms for type names
This change adds a list of conventional acronyms that are used for function
completion. For example, "err" for "error" and "tx" for "sql.Tx" or "sqlx.Tx".

Fixes golang/go#48260

Change-Id: Iff951ee58c0c95389d474cc45dfd84b483ff71e3
GitHub-Last-Rev: 05ccd5a2fe95e2e0504d28230308c4888477a977
GitHub-Pull-Request: golang/tools#363
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2022-02-03 15:53:42 +00:00
Marwan Sulaiman 9f83dd3691 internal/lsp/source: use the real type parameter in snippet completions
This change makes source.FormatVarType return the instantiated type
parameter instead of the actual AST expression because that will just
refer to the abstract type parameter and not the insantiated one.
I am not sure if this covers all edge cases or if there's a better
solution but I'm happy to adjust to whatever is appropriate.

Fixes golang/go#50623

Change-Id: I6e0b2d93c47c9a0502f2995ca8d3668a9a31c056
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2022-01-21 14:07:19 +00:00
Rohan Verma 15409b55a9 internal/lsp: foldable multiline strings
This commit adds support for detecting multiline strings for folding
ranges.

Fixes golang/go#49554

Change-Id: Idf0afb16e1fc95240cf5cbfd405a72658d715618
GitHub-Last-Rev: 3894380fcda325a5758b951e06d8f7a362652c28
GitHub-Pull-Request: golang/tools#354
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2022-01-04 20:54:25 +00:00
Robert Findley 1a3081d393 all: prepare for formatting any as 'any' in type strings
Make a couple of small changes to support keeping track of the
predeclared any by pointer identity, and formatting it as 'any'. This
should allow x/tools trybots to pass on CL 363974.

Updates golang/go#49583

Change-Id: I79cffee6adbf000a7251dbea4091fdd7b8fdcf0a
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2021-11-16 14:26:19 +00:00
Suzy Mueller 6f2254e651 internal/lsp: adjust extract function range if block statement
If the selected region is a block statement, gopls
does not return a valid function extraction. This
change adjusts the range to be the statements inside
of the selected block statement.

Fixes golang/go#48963

Change-Id: I9b1fb5005f961f30c1fa0333cd1f2050ed5eedef
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2021-10-22 02:18:41 +00:00
Rebecca Stambler 7898fe60e6 internal/lsp/analysis: move implementmissing logic into undeclared
I missed the TODO in undeclaredname to add support for functions, so
really this belongs in that analyzer. This removes a fair bit of code.
However, the type error analyzers don't really work with the go/analysis
testing framework because the suggested fixes are split from the
diagnostics, so I moved the tests into the gopls tests.

Change-Id: I861a7ad531d2732fe698ee0ac46f23ad53b16812
Reviewed-on: https://go-review.googlesource.com/c/tools/+/351333
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2021-09-28 22:17:57 +00:00
Robert Findley 0cffec9e30 go/internal/gcimporter: update iimport.go to support type parameters
This CL pulls in the latest changes from go/internal/gcimporter, while
avoiding breaking the build on older go versions. To help maintain
compatibility with older Go versions while minimizing the diff with the
standard library importer, the internal/typeparams package was
significantly expanded.

I decided to use type aliases in the internal/typeparams package on Go
version >= go1.18, and placeholder types on Go version < go1.18. This
reduces the amount of copying needed in the APIs, though it might not be
the best decision if we ever decide to export this package.
Documentation was also updated to be more concise and specific to the Go
version being used.

In order to actually fix the x/tools Trybot for packages using generics
in the standard library, we need to switch from the 'typeparams' build
constraint to the 'go1.18' build constraint. This means if we make any
additional API changes in go/types we'll have to submit them with a
broken x/tools Trybot and then immediately fix the x/tools build.

Change-Id: Ifa0b1c37b89dc549ee295fa3a959f03deda86e56
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2021-09-15 00:13:36 +00:00
Robert Findley 5492d01d98 internal/lsp/testdata: update inferred.go to use hoverdef
Change-Id: I0245a594680c8aaf6e2664eafd97ed8ad5ce0ac3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/350029
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2021-09-14 23:55:15 +00:00
Jean-Hadrien Chabran cd7c003cd3 internal/lsp: add support for hovering runes
Enable to hover runes found in basic literals in various forms.
When a rune is found, the hover message provides a summary composed of a
printable version (if it exists) of the rune, its codepoint and its name.

Behaviour varies slightly depending on the basic literal: rune literals
always display the summary when hovered, string literals only display it
when an escaped rune sequence is found to avoid providing unnecessary
information, and finally number literals only when expressed as a
hexadecimal number whose size ranges from one to eight bytes.

Fixes golang/go#38239

Change-Id: I024fdd5c511a45c7c285e200ce1eda0669a45491
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2021-09-14 22:22:34 +00:00
Chitoku e7de6523a2 internal/lsp: produce "method" in place of "member" as per the spec
As per the current specification, the correct token name that represents methods is `method`. The current implementation does not produce the correct set of result and results in methods being incorrectly highlighted. Furthermore, the parameter names of interface methods are treated as `method` which is not true, so a fix has been applied to handle `ast.FuncType` being `parameter`.

Spec: https://microsoft.github.io/language-server-protocol/specifications/specification-3-16/#textDocument_semanticTokens

Change-Id: Id5d2fafe9f948a4a175ae19b4c94cca8f48a4b79
GitHub-Last-Rev: 9a3b65ca4dd3bb0542969c043a2042001c7fcb63
GitHub-Pull-Request: golang/tools#340
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2021-09-13 21:01:54 +00:00
pjw 70fb962d80 internal/lsp/semantic: semantic tokens for imports of versions
For
import "a/bar/foo"
the existing code just decides the last component is the package name.
But for
import "a/bar/v2" this is incorrect, as the packge name is 'bar'.
The new code uses the result of parsing to derive the package name
from the import string.

That is, the package name was determined syntactically, it is
now determined semantically.

Fixes https://golang.org/issue/47784

Change-Id: Iccdd25e7e3f591e6514b1e0258e9e1879af9ff2d
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2021-08-31 17:42:36 +00:00
Suzy Mueller f91c4a586e internal/lsp: use LookupParent for finding scope
The lexicalLookup function is used to determine if
a use of an object would be shadowed by a different
definition after a rename. Switch to using LookupParent
which is more careful about the positions of the
identifiers.

Fixes golang/go#47583

Change-Id: I3dbdf79e537ce637d1276ddbecb094db21f1c26d
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2021-08-11 21:39:32 +00:00
Rob Findley 0f3931c766 internal/lsp: precompute workspace symbols
Coupling workspace symbols to package checking means that they do not
function when the workspace is contracted, and also forces us to do
duplicate work traversing file declarations.

This CL changes the workspace symbol implementation to precompute
symbols based only on syntactic information, allowing them to function
in degraded workspace mode, improving their performance, and laying the
groundwork for more significant performance improvement later on.

There is some loss of precision where we can't determine the kind of a
symbol from syntactic information alone, but this is minor: we fall back
on 'Class' if we can't determine whether a type definition is a basic
type, struct, or interface.

Benchmark ("test" in x/tools): 56ms->40ms
Benchmark ("test" in kuberneted): 874ms->799ms

Change-Id: Ic48df29b387bf029dd374d7d09720746bc27ae5e
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2021-08-09 20:20:17 +00:00
Rob Findley 322816044c internal/typeparams: update x/tools for recent typeparams changes
Recent changes to the go/ast APIs for type parameters have broken the
internal/typeparams package when built with -tags=typeparams.

Fix this by adjusting the internal/typeparams API. Also update a few
tests accordingly.

Bump the build constraint used by the internal/typeparams package to
go1.18, as we are no longer compatible with the 1.17 typeparams API. It
is no long possible to opt in to type parameter specific functionality
1.17, which is fine as the dev.typeparams branch has moved to 1.18.

Even after these fixes, not all x/tools tests pass with go1.18. Some
completion tests are failing due to finding 'any' in types.Universe.

Change-Id: I5f92870aaf7853e531e3a154987f98520a52d70c
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2021-08-03 15:39:08 +00:00
Suzy Mueller a66849847a internal/lsp: find references for ident before selector
Previously, if the position was before the "." in a selector,
pathEnclosingObjNode would move the position to right after the
".". This created confusing behavior where editors would highlight
the identifier before the ".", but references and go to definition
would be applied on the identified after the selector. This change
removes the shifting of the position if found on a selector.

Fixes golang/go#47408

Change-Id: If2504e7d5af2fae24b97c5c1e88b9cbe67aaaaf3
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2021-08-02 19:06:04 +00:00
Karthik Nayak 4fe0d6c80e internal/lsp: skip signature help within a string literal
Currently the `SignatureHelp` function provides signature help even when the
requested range lies within a string literal. Let's suppress this behavior and
return an error when someone requests signature help from within a string
literal.

Fixes golang/go#43397

Signed-off-by: Karthik Nayak <karthik.188@gmail.com>

Change-Id: Ib03e87258622f4294bf9385bf5f0a8effe0050ee
GitHub-Last-Rev: 0c9549ae68b0263a3cac274da133e9ab4b4c7bf5
GitHub-Pull-Request: golang/tools#332
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2021-07-26 16:44:13 +00:00
Suzy Mueller 46d1522a5d internal/lsp: add extract to method code action
"Extract method" allows users to take a code fragment and move it
to a separate method. This is available if the enclosing function
is a method.

Change-Id: Ib824f6b79b13ca73532223283a050946c90a47e7
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2021-07-23 18:08:39 +00:00
pjw 0cf4e2708a internal/lsp/semantic: improve semantic token processing
There is insufficient type information to compute semantic tokens in
packages that don't compile. Particularly affected are test files
and files being actively edited in new packages.
Further, existing code could
panic on poorly formed imports; this has been fixed.
Computing semantic tokens for identifiers
having neither use or definition information has been improved.
(Each of the many cases in the new function unkIdent() occurs
in existing code or test files.)

Change-Id: Id1b5db0622b17076de1ed23a950a20cd03c3750a
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2021-07-14 22:42:09 +00:00