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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
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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
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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: context_test.go
Close
// Copyright 2021 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 import ( "go/token" "testing" ) func TestContextHashCollisions(t *testing.T) { if debug { t.Skip("hash collisions are expected, and would fail debug assertions") } // Unit test the de-duplication fall-back logic in Context. // // We can't test this via Instantiate because this is only a fall-back in // case our hash is imperfect. // // These lookups and updates use reasonable looking types in an attempt to // make them robust to internal type assertions, but could equally well use // arbitrary types. // Create some distinct origin types. nullaryP and nullaryQ have no // parameters and are identical (but have different type parameter names). // unaryP has a parameter. var nullaryP, nullaryQ, unaryP Type { // type nullaryP = func[P any]() tparam := NewTypeParam(NewTypeName(token.NoPos, nil, "P", nil), &emptyInterface) nullaryP = NewSignatureType(nil, nil, []*TypeParam{tparam}, nil, nil, false) } { // type nullaryQ = func[Q any]() tparam := NewTypeParam(NewTypeName(token.NoPos, nil, "Q", nil), &emptyInterface) nullaryQ = NewSignatureType(nil, nil, []*TypeParam{tparam}, nil, nil, false) } { // type unaryP = func[P any](_ P) tparam := NewTypeParam(NewTypeName(token.NoPos, nil, "P", nil), &emptyInterface) params := NewTuple(NewVar(token.NoPos, nil, "_", tparam)) unaryP = NewSignatureType(nil, nil, []*TypeParam{tparam}, params, nil, false) } ctxt := NewContext() // Update the context with an instantiation of nullaryP. inst := NewSignatureType(nil, nil, nil, nil, nil, false) if got := ctxt.update("", nullaryP, []Type{Typ[Int]}, inst); got != inst { t.Error("bad") } // unaryP is not identical to nullaryP, so we should not get inst when // instantiated with identical type arguments. if got := ctxt.lookup("", unaryP, []Type{Typ[Int]}); got != nil { t.Error("bad") } // nullaryQ is identical to nullaryP, so we *should* get inst when // instantiated with identical type arguments. if got := ctxt.lookup("", nullaryQ, []Type{Typ[Int]}); got != inst { t.Error("bad") } // ...but verify we don't get inst with different type arguments. if got := ctxt.lookup("", nullaryQ, []Type{Typ[String]}); got != nil { t.Error("bad") } }