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opt / golang / 1.19.4 / src / cmd / compile / internal / types2 / testdata / check /

📁 ..
📄 blank.go(203 B)
📄 builtins0.go(23.81 KB)
📄 builtins1.go(5.46 KB)
📄 chans.go(1.66 KB)
📄 compliterals.go(442 B)
📄 const0.go(9.18 KB)
📄 const1.go(8.56 KB)
📄 constdecl.go(3.67 KB)
📄 conversions0.go(1.71 KB)
📄 conversions1.go(5.07 KB)
📄 cycles0.go(2.85 KB)
📄 cycles1.go(781 B)
📄 cycles2.go(1.12 KB)
📄 cycles3.go(675 B)
📄 cycles4.go(2.03 KB)
📄 cycles5.go(2.98 KB)
📄 decls0.go(3.97 KB)
📄 decls1.go(3.6 KB)
📁 decls2
📄 decls3.go(4.24 KB)
📄 decls4.go(3.1 KB)
📄 decls5.go(363 B)
📄 errors.go(2.16 KB)
📄 expr0.go(3.7 KB)
📄 expr1.go(2.61 KB)
📄 expr2.go(4.92 KB)
📄 expr3.go(15.42 KB)
📄 funcinference.go(2.07 KB)
📄 go1_12.go(1.07 KB)
📄 go1_13.go(402 B)
📄 go1_16.go(343 B)
📄 go1_8.go(333 B)
📄 gotos.go(5.77 KB)
📄 importC.go(1.23 KB)
📁 importdecl0
📁 importdecl1
📄 init0.go(1.91 KB)
📄 init1.go(1.46 KB)
📄 init2.go(3.51 KB)
📁 issue25008
📄 issues0.go(11.44 KB)
📄 issues1.go(6.02 KB)
📄 labels.go(3.25 KB)
📄 linalg.go(2.24 KB)
📄 literals.go(2.35 KB)
📄 main0.go(361 B)
📄 main1.go(250 B)
📄 map0.go(2.82 KB)
📄 map1.go(3.4 KB)
📄 methodsets.go(3.44 KB)
📄 shifts.go(12.62 KB)
📄 slices.go(1.51 KB)
📄 stmt0.go(18.68 KB)
📄 stmt1.go(3.31 KB)
📄 typeinference.go(1.38 KB)
📄 typeinst0.go(1.62 KB)
📄 typeinst1.go(5.65 KB)
📄 typeinstcycles.go(384 B)
📄 typeparams.go(15.06 KB)
📄 unions.go(2.15 KB)
📄 vardecl.go(5.47 KB)

Editing: typeinst0.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 p

type myInt int

// Parameterized type declarations

// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
type T1[P any] P // ERROR cannot use a type parameter as RHS in type declaration

type T2[P any] struct {
        f P
        g int // int should still be in scope chain
}

type List[P any] []P

// Alias type declarations cannot have type parameters.
// Issue #46477 proposses to change that.
type A1[P any] = /* ERROR cannot be alias */ struct{}

// Pending clarification of #46477 we disallow aliases
// of generic types.
type A2 = List // ERROR cannot use generic type
var _ A2[int]
var _ A2

type A3 = List[int]
var _ A3

// Parameterized type instantiations

var x int
type _ x /* ERROR not a type */ [int]

type _ int /* ERROR not a generic type */ [] // ERROR expecting type
type _ myInt /* ERROR not a generic type */ [] // ERROR expecting type

// TODO(gri) better error messages
type _ T1[] // ERROR expecting type
type _ T1[x /* ERROR not a type */ ]
type _ T1 /* ERROR got 2 arguments but 1 type parameters */ [int, float32]

var _ T2[int] = T2[int]{}

var _ List[int] = []int{1, 2, 3}
var _ List[[]int] = [][]int{{1, 2, 3}}
var _ List[List[List[int]]]

// Parameterized types containing parameterized types

type T3[P any] List[P]

var _ T3[int] = T3[int](List[int]{1, 2, 3})

// Self-recursive generic types are not permitted

type self1[P any] self1 /* ERROR illegal cycle */ [P]
type self2[P any] *self2[P] // this is ok

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Editing: typeinst0.go

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