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12/01/2022 06:13:56 PM
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api.go
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api_test.go
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array.go
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assignments.go
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basic.go
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builtins.go
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builtins_test.go
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call.go
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chan.go
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check.go
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check_test.go
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context.go
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context_test.go
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conversions.go
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decl.go
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errorcodes.go
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errorcodes_test.go
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errors.go
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errors_test.go
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eval.go
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eval_test.go
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example_test.go
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expr.go
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exprstring.go
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exprstring_test.go
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gccgosizes.go
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gotype.go
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hilbert_test.go
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index.go
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infer.go
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initorder.go
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instantiate.go
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instantiate_test.go
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interface.go
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issues_test.go
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labels.go
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lookup.go
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main_test.go
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map.go
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methodset.go
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methodset_test.go
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mono.go
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mono_test.go
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named.go
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named_test.go
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object.go
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object_test.go
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objset.go
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operand.go
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package.go
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pointer.go
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predicates.go
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resolver.go
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resolver_test.go
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return.go
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scope.go
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selection.go
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self_test.go
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signature.go
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sizeof_test.go
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sizes.go
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sizes_test.go
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slice.go
576 bytes
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stdlib_test.go
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stmt.go
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struct.go
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subst.go
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termlist.go
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termlist_test.go
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testdata
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token_test.go
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tuple.go
928 bytes
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type.go
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typelists.go
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typeparam.go
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typeset.go
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typeset_test.go
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typestring.go
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typestring_test.go
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typeterm.go
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typeterm_test.go
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typexpr.go
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unify.go
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union.go
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universe.go
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validtype.go
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version.go
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Editing: named_test.go
Close
// Copyright 2022 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 types_test import ( "go/ast" "go/parser" "go/token" "testing" . "go/types" ) func BenchmarkNamed(b *testing.B) { const src = ` package p type T struct { P int } func (T) M(int) {} func (T) N() (i int) { return } type G[P any] struct { F P } func (G[P]) M(P) {} func (G[P]) N() (p P) { return } type Inst = G[int] ` pkg, err := pkgForMode("p", src, nil, 0) if err != nil { b.Fatal(err) } var ( T = pkg.Scope().Lookup("T").Type() G = pkg.Scope().Lookup("G").Type() SrcInst = pkg.Scope().Lookup("Inst").Type() UserInst = mustInstantiate(b, G, Typ[Int]) ) tests := []struct { name string typ Type }{ {"nongeneric", T}, {"generic", G}, {"src instance", SrcInst}, {"user instance", UserInst}, } b.Run("Underlying", func(b *testing.B) { for _, test := range tests { b.Run(test.name, func(b *testing.B) { // Access underlying once, to trigger any lazy calculation. _ = test.typ.Underlying() b.ResetTimer() for i := 0; i < b.N; i++ { _ = test.typ.Underlying() } }) } }) b.Run("NewMethodSet", func(b *testing.B) { for _, test := range tests { b.Run(test.name, func(b *testing.B) { // Access underlying once, to trigger any lazy calculation. _ = NewMethodSet(test.typ) b.ResetTimer() for i := 0; i < b.N; i++ { _ = NewMethodSet(test.typ) } }) } }) } func mustInstantiate(tb testing.TB, orig Type, targs ...Type) Type { inst, err := Instantiate(nil, orig, targs, true) if err != nil { tb.Fatal(err) } return inst } // Test that types do not expand infinitely, as in golang/go#52715. func TestFiniteTypeExpansion(t *testing.T) { const src = ` package p type Tree[T any] struct { *Node[T] } func (*Tree[R]) N(r R) R { return r } type Node[T any] struct { *Tree[T] } func (Node[Q]) M(Q) {} type Inst = *Tree[int] ` fset := token.NewFileSet() f, err := parser.ParseFile(fset, "foo.go", src, 0) if err != nil { t.Fatal(err) } pkg := NewPackage("p", f.Name.Name) if err := NewChecker(nil, fset, pkg, nil).Files([]*ast.File{f}); err != nil { t.Fatal(err) } firstFieldType := func(n *Named) *Named { return n.Underlying().(*Struct).Field(0).Type().(*Pointer).Elem().(*Named) } Inst := pkg.Scope().Lookup("Inst").Type().(*Pointer).Elem().(*Named) Node := firstFieldType(Inst) Tree := firstFieldType(Node) if !Identical(Inst, Tree) { t.Fatalf("Not a cycle: got %v, want %v", Tree, Inst) } if Inst != Tree { t.Errorf("Duplicate instances in cycle: %s (%p) -> %s (%p) -> %s (%p)", Inst, Inst, Node, Node, Tree, Tree) } }