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87eab74628
This change makes a first connection between the compiler and types2. When the -G flag is provided, the compiler accepts code using type parameters; with this change generic code is also type-checked (but then compilation ends). Change-Id: I0fa6f6213267a458a6b33afe8ff26869fd838a63 Reviewed-on: https://go-review.googlesource.com/c/go/+/264303 Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
43 lines
1 KiB
Go
43 lines
1 KiB
Go
// errorcheck -G
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// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Basic type parameter list type-checking (not syntax) errors.
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package tparam1
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// The predeclared identifier "any" is only visible as a constraint
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// in a type parameter list.
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var _ any // ERROR "undeclared"
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func _(_ any) // ERROR "undeclared"
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type _[_ any /* ok here */ ] struct{}
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const N = 10
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type (
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_[] struct{} // slice
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_[N] struct{} // array
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_[T any] struct{}
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_[T, T any] struct{} // ERROR "T redeclared"
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_[T1, T2 any, T3 any] struct{}
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)
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func _[T any]()
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func _[T, T any]() // ERROR "T redeclared"
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func _[T1, T2 any](x T1) T2
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// Type parameters are visible from opening [ to end of function.
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type C interface{}
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func _[T interface{}]()
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func _[T C]()
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func _[T struct{}]() // ERROR "not an interface"
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func _[T interface{ m() T }]()
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func _[T1 interface{ m() T2 }, T2 interface{ m() T1 }]() {
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var _ T1
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}
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// TODO(gri) expand this
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