golang compilersupport 代码
文件路径：/src/cmd/compile/internal/types2/compilersupport.go
/ 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.
/ Helper functions exported for the compiler.
/ Do not use internally.
package types2
/ If t is a pointer, AsPointer returns that type, otherwise it returns nil.
func AsPointer(t Type) *Pointer {
u, _ := t.Underlying().(*Pointer)
return u
}
/ If t is a signature, AsSignature returns that type, otherwise it returns nil.
func AsSignature(t Type) *Signature {
u, _ := t.Underlying().(*Signature)
return u
}
/ If typ is a type parameter, CoreType returns the single underlying
/ type of all types in the corresponding type constraint if it exists, or
/ nil otherwise. If the type set contains only unrestricted and restricted
/ channel types (with identical element types), the single underlying type
/ is the restricted channel type if the restrictions are always the same.
/ If typ is not a type parameter, CoreType returns the underlying type.
func CoreType(t Type) Type {
return coreType(t)
}