Improve candidate ranking when completing the variadic parameter of
function calls.
Using the example:
func foo(strs ...string) {}
- When completing foo(<>), we prefer candidates of type []string or
string (previously we only preferred []string).
- When completing foo("hi", <>), we prefer candidates of type
string (previously we preferred []string).
- When completing foo(<>), we use a snippet to add on the "..."
automatically to candidates of type []string.
I also fixed completion tests to work properly when you have multiple
notes referring to the same position. For example:
foo() //@rank(")", a, b),rank(")", a, c)
Previously the second "rank" was silently overwriting the first
because they both refer to the same ")".
Fixesgolang/go#34334.
Change-Id: I4f64be44a4ccbb533fb7682738c759cbca3a93cd
Reviewed-on: https://go-review.googlesource.com/c/tools/+/205117
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Packages that aren't imported in the current file will often have been
used elsewhere, which means that gopls will have their type information
available. Expose loaded packages in the Snapshot, and try to use that
information when possible for unimported packages.
Change-Id: Icb672618a9f9ec31b9796f0c5da56ed3d2b38aa7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/204824
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
When a user completes rand.<>, propose rand.Seed (from math/rand) and
rand.Prime (from crypto/rand), etc.
Because we don't necessarily have type checking information for
unimported packages, I had to add shortcut cases to a number of
functions around the completion code. Better suggestions welcome.
Change-Id: I7822dc75c86b24156963e7bdd959443f4f2748b1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/204819
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Muir Manders <muir@mnd.rs>
When our expected type is a named type from another package, we now always
search that other package for completion candidates, even if it is not currently
imported.
Consider the example:
-- foo.go --
import "context"
func doSomething(ctx context.Context) {}
-- bar.go--
doSomething(<>)
"bar.go" doesn't import "context" yet, so normally you need to first import
"context" through whatever means before you get completion items from "context".
Now we notice that the expected type's package hasn't been imported yet and give
deep completions from "context".
Another use case is with literal completions. Consider:
-- foo.go --
import "bytes"
func doSomething(buf *bytes.Buffer) {}
-- bar.go--
doSomething(<>)
Now you will get a literal completion for "&bytes.Buffer{}" in "bar.go" even
though it hasn't imported "bytes" yet.
I had to pipe the import info around a bunch of places so the import is added
automatically for deep completions and literal completions.
Change-Id: Ie86af2aa64ee235038957c1eecf042f7ec2b329b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/201207
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
In cases like:
type myInt int
const (
a = 1
b myInt = 2
)
var foo myInt = <>
We now prefer "b" over "a" since b's type matches the expected type
exactly.
Change-Id: I675934761cc17f6b303b63b4715b31dd1af7cea1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/202737
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
We now expect a type name when in the key or value of a *ast.MapType.
I also added an extra filter to expect a comparable type for the key.
Change-Id: I647cf4d791b2c0960ad3b12702b91b9bc168599b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/197439
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
*ast.ArrayTypes are type expressions like "[]foo" or "[2]int". They
show up as standalone types (e.g. "var foo []int") and as part of
composite literals (e.g. "[]int{}"). I made the following
improvements:
- Always expect a type name for array types.
- Add a "type modifier" for array types so completions can be smart
when we know the expected type. For example:
var foo []int
foo = []i<>
we know we want a type name, but we also know the expected type is
"[]int". When evaluating type names such as "int" we turn the type
into a slice type "[]int" to match against the expected type.
- Tweak the AST fixing to add a phantom selector "_" after a naked
"[]" so you can complete directly after the right bracket.
I split out the type name related type inference bits into a separate
typeNameInference struct. It had become confusing and complicated,
especially now that you can have an expected type and expect a type
name at the same time.
Change-Id: I00878532187ee5366ab8d681346532e36fa58e5f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/197438
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
For *ast.Ident completion requests, this checks the parent node to
see if the token begins a statement and then based on the path adds
possible keyword completion candidates. The test lists some cases where
this approach cannot provide completion candidates.
The biggest thing missing is keywords for file level declarations
Updates golang/go#34009
Change-Id: I9d9c0c1eb88e362613feca66d0eea6b88705b9b0
Reviewed-on: https://go-review.googlesource.com/c/tools/+/196664
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Currently array and slice literals don't work very well for
completion. When go/parser is not expecting a type, it often turns
array types (e.g. "[]int") into *ast.BadExpr, which messes up
completion because we can't figure out the prefix from *ast.BadExpr,
and *ast.BadExprs don't get type checked.
This change addresses the first problem of not being able to figure
out the prefix. If we see an *ast.BadExpr, we now blindly try to
reparse it as a composite literal by adding on "{}". If we end up with
an *ast.CompositeLit with an *ast.ArrayType "Type", we swap
the *ast.BadExpr for the *ast.ArrayType. This approach is dumb but
simple, and fixes lexical completions in array types.
Change-Id: Ifa42e646bcbf2a30170d73e6dd11982384d40b43
Reviewed-on: https://go-review.googlesource.com/c/tools/+/197437
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
There was a regression where gopls would not type-check any package with
a bad import. This change fixes the regression and adds a test to make
sure it doesn't happen again.
Change-Id: I3acf0917d46e9444c20135559f057f0ecd20e15b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/201539
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
We now continue deep completion search across function calls. The
function must take no arguments and return a single argument. For
example, when completing "fo<>" you might get candidates such as
"foo.bar().baz()".
Previously we would stop searching for deep completions when we hit a
function call. For example, we would stop at "foo.bar()", never
finding "foo.bar().baz()". At the time I was worried about the search
scope growing too large, but now that we dynamically limit the search
scope there isn't much left to worry about.
Change-Id: I48772c154400662876682503c1f58ef6e3dca688
Reviewed-on: https://go-review.googlesource.com/c/tools/+/201222
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Previously we unconditionally qualified literal candidate types with
their package. For example:
var buf *bytes.Buffer
buf = &bytes.Bu<>
would complete to:
buf = &bytes.bytes.Buffer{}
Now we don't qualify the type if the cursor position is in the
selector of an *ast.SelectorExpr. We only generate literal candidates
for type names, so if we are in a selector then we can assume it is a
package qualified type (as opposed to an object field).
We also handle the insertion of "&" for literal pointers better. If you are in
the selector of an *ast.SelectorExpr, we prepend the "&" to the beginning of the
expression rather than the selector. For example, you will end up with
"&bytes.Buffer{}" instead of "bytes.&Buffer{}".
Updates golang/go#34872.
Change-Id: I812aa809cd4e649a429853386789f80033412814
Reviewed-on: https://go-review.googlesource.com/c/tools/+/201200
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Now we offer completion candidates for labels when completing "break",
"continue", and "goto" statements. We are reasonably smart about
filtering unusable labels, except we don't filter "goto" candidates
that jump across variable definitions.
Fixesgolang/go#33987.
Change-Id: If296a7579845aba5d86c7050ab195c35d4b147ed
Reviewed-on: https://go-review.googlesource.com/c/tools/+/197417
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
This makes it much easier to keep them up to date.
It is also less fragile against accidental changes.
Change-Id: If119f8527c0896d210650859960e77f3e0fa5a99
Reviewed-on: https://go-review.googlesource.com/c/tools/+/197505
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
