go builtins 源码
golang builtins 代码
文件路径：/test/typeparam/builtins.go
// compile
// Copyright 2020 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.
// This file tests built-in calls on generic types.
// derived and expanded from cmd/compile/internal/types2/testdata/check/builtins.go2
package builtins
// close
type C0 interface{ int }
type C1 interface{ chan int }
type C2 interface{ chan int | <-chan int }
type C3 interface{ chan int | chan float32 }
type C4 interface{ chan int | chan<- int }
type C5[T any] interface{ ~chan T | chan<- T }
func f1[T C1](ch T) {
close(ch)
}
func f2[T C3](ch T) {
close(ch)
}
func f3[T C4](ch T) {
close(ch)
}
func f4[T C5[X], X any](ch T) {
close(ch)
}
// delete
type M0 interface{ int }
type M1 interface{ map[string]int }
type M2 interface {
map[string]int | map[string]float64
}
type M3 interface{ map[string]int | map[rune]int }
type M4[K comparable, V any] interface{ map[K]V | map[rune]V }
func g1[T M1](m T) {
delete(m, "foo")
}
func g2[T M2](m T) {
delete(m, "foo")
}
func g3[T M4[rune, V], V any](m T) {
delete(m, 'k')
}
// make
func m1[
S1 interface{ []int },
S2 interface{ []int | chan int },
M1 interface{ map[string]int },
M2 interface{ map[string]int | chan int },
C1 interface{ chan int },
C2 interface{ chan int | chan string },
]() {
_ = make([]int, 10)
_ = make(m1S0, 10)
_ = make(S1, 10)
_ = make(S1, 10, 20)
_ = make(map[string]int)
_ = make(m1M0)
_ = make(M1)
_ = make(M1, 10)
_ = make(chan int)
_ = make(m1C0)
_ = make(C1)
_ = make(C1, 10)
}
// TODO: put these type declarations back inside m1 when issue 47631 is fixed.
type m1S0 []int
type m1M0 map[string]int
type m1C0 chan int
// len/cap
type Slice[T any] interface {
[]T
}
func c1[T any, S Slice[T]]() {
x := make(S, 5, 10)
_ = len(x)
_ = cap(x)
}
// append
func a1[T any, S Slice[T]]() {
x := make(S, 5)
y := make(S, 2)
var z T
_ = append(x, y...)
_ = append(x, z)
}
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