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go/internal/lsp/testdata/deepcomplete/deep_complete.go
Muir Manders 6afc7fcab5 internal/lsp: enable deep completion and fuzzy matching by default
Invert "useDeepCompletions" config flag to "disableDeepCompletion" and
separate out "disableFuzzyMatching" which reverts to the previous
prefix matching behavior.

I separated fuzzy matching tests out to a separate file so they aren't
entangled with deep completion tests. In coming up with representative
test cases I found a couple issues which I fixed:

- We were treating a fuzzy matcher score of 0 as no match, but the
  matcher returns 0 for candidates that match but have no bonuses. I
  changed the matcher interface so that a score of 0 counts as a
  match. For example, this was preventing a pattern of "o" from
  matching "foo".
- When we lower a candidate's score based on its depth, we were
  subtracting a static multiplier which could result in the score
  going negative. A negative score messes up future score weighting
  because multiplying it by a value in the range [0, 1) makes it
  bigger instead of smaller. Fix by scaling a candidate's score based
  on its depth rather than subtracting a constant factor.

Updates golang/go#32754

Change-Id: Ie6f9111f1696b0d067d08f7eed7b0a338ad9cd67
Reviewed-on: https://go-review.googlesource.com/c/tools/+/192137
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2019-08-30 16:47:54 +00:00

91 lines
2.6 KiB
Go

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package deepcomplete
import "context" //@item(ctxPackage, "context", "\"context\"", "package")
type deepA struct {
b deepB //@item(deepBField, "b", "deepB", "field")
}
type deepB struct {
}
func wantsDeepB(deepB) {}
func _() {
var a deepA //@item(deepAVar, "a", "deepA", "var")
a.b //@item(deepABField, "a.b", "deepB", "field")
wantsDeepB(a) //@complete(")", deepABField, deepAVar)
deepA{a} //@snippet("}", deepABField, "a.b", "a.b")
}
func wantsContext(context.Context) {}
func _() {
context.Background() //@item(ctxBackground, "context.Background", "func() context.Context", "func", "Background returns a non-nil, empty Context.")
context.TODO() //@item(ctxTODO, "context.TODO", "func() context.Context", "func", "TODO returns a non-nil, empty Context.")
context.WithValue(nil, nil, nil) //@item(ctxWithValue, "context.WithValue", "func(parent context.Context, key interface{}, val interface{}) context.Context", "func", "WithValue returns a copy of parent in which the value associated with key is val.")
wantsContext(c) //@complete(")", ctxBackground, ctxTODO, ctxWithValue, ctxPackage)
}
func _() {
type deepCircle struct { //@item(deepCircleStruct, "deepCircle", "struct{...}", "struct")
*deepCircle
}
var circle deepCircle //@item(deepCircle, "circle", "deepCircle", "var")
circle.deepCircle //@item(deepCircleField, "circle.deepCircle", "*deepCircle", "field")
var _ deepCircle = circ //@complete(" //", deepCircle, deepCircleField)
}
func _() {
type deepEmbedC struct {
}
type deepEmbedB struct {
deepEmbedC
}
type deepEmbedA struct {
deepEmbedB
}
wantsC := func(deepEmbedC) {}
var a deepEmbedA //@item(deepEmbedA, "a", "deepEmbedA", "var")
a.deepEmbedB //@item(deepEmbedB, "a.deepEmbedB", "deepEmbedB", "field")
a.deepEmbedC //@item(deepEmbedC, "a.deepEmbedC", "deepEmbedC", "field")
wantsC(a) //@complete(")", deepEmbedC, deepEmbedA, deepEmbedB)
}
func _() {
type nested struct {
a int
n *nested //@item(deepNestedField, "n", "*nested", "field")
}
nested{
a: 123, //@complete(" //", deepNestedField)
}
}
func _() {
var a struct {
b struct {
c int
}
d int
}
a.d //@item(deepAD, "a.d", "int", "field")
a.b.c //@item(deepABC, "a.b.c", "int", "field")
a.b //@item(deepAB, "a.b", "struct{...}", "field")
a //@item(deepA, "a", "struct{...}", "var")
// "a.d" should be ranked above the deeper "a.b.c"
var i int
i = a //@complete(" //", deepAD, deepABC, deepA, deepAB)
}