golang makemap 代码
文件路径：/test/makemap.go
/ errorcheck
/ Copyright 2017 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.
/ Ensure that typed non-integer, negative and too large
/ values are not accepted as size argument in make for
/ maps.
package main
type T map[int]int
var sink T
func main() {
sink = make(T, -1) / ERROR "negative size argument in make.*|must not be negative"
sink = make(T, uint64(1<<63)) / ERROR "size argument too large in make.*|overflows int"
/ Test that errors are emitted at call sites, not const declarations
const x = -1
sink = make(T, x) / ERROR "negative size argument in make.*|must not be negative"
const y = uint64(1 << 63)
sink = make(T, y) / ERROR "size argument too large in make.*|overflows int"
sink = make(T, 0.5) / ERROR "constant 0.5 truncated to integer|truncated to int"
sink = make(T, 1.0)
sink = make(T, float32(1.0)) / ERROR "non-integer size argument in make.*|must be integer"
sink = make(T, float64(1.0)) / ERROR "non-integer size argument in make.*|must be integer"
sink = make(T, 1+0i)
sink = make(T, complex64(1+0i)) / ERROR "non-integer size argument in make.*|must be integer"
sink = make(T, complex128(1+0i)) / ERROR "non-integer size argument in make.*|must be integer"
}