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cmd/compile: use Structure() to get single underlying type of typeparam.

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Use types2.Structure() to get single underlying type of typeparams, to
handle some unusual cases where a type param is constrained to a single
underlying struct or map type.

Fixes #48538

Change-Id: I289fb7b31d489f7586f2b04aeb1df74e15a9f965
Reviewed-on: https://go-review.googlesource.com/c/go/+/359335
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Dan Scales 2021-10-27 19:16:27 -07:00
parent 8dfb447231
commit 5d6d9f5610
3 changed files with 62 additions and 1 deletions
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2
src/cmd/compile/internal/noder/expr.go
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@ -344,7 +344,7 @@ func (g *irgen) compLit(typ types2.Type, lit *syntax.CompositeLit) ir.Node {
return typed(g.typ(typ), n)
}
_, isStruct := typ.Underlying().(*types2.Struct)
_, isStruct := types2.Structure(typ).(*types2.Struct)
exprs := make([]ir.Node, len(lit.ElemList))
for i, elem := range lit.ElemList {