go err2 源码
golang err2 代码
文件路径：/misc/cgo/errors/testdata/err2.go
// Copyright 2013 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 main
/*
#include <stdio.h>
typedef struct foo foo_t;
typedef struct bar bar_t;
foo_t *foop;
long double x = 0;
static int transform(int x) { return x; }
typedef void v;
void F(v** p) {}
void fvi(void *p, int x) {}
void fppi(int** p) {}
int i;
void fi(int i) {}
*/
import "C"
import (
"unsafe"
)
func main() {
s := ""
_ = s
C.malloc(s) // ERROR HERE
x := (*C.bar_t)(nil)
C.foop = x // ERROR HERE
// issue 13129: used to output error about C.unsignedshort with CC=clang
var x1 C.ushort
x1 = int(0) // ERROR HERE: C\.ushort
// issue 13423
_ = C.fopen() // ERROR HERE
// issue 13467
var x2 rune = '✈'
var _ rune = C.transform(x2) // ERROR HERE: C\.int
// issue 13635: used to output error about C.unsignedchar.
// This test tests all such types.
var (
_ C.uchar = "uc" // ERROR HERE: C\.uchar
_ C.schar = "sc" // ERROR HERE: C\.schar
_ C.ushort = "us" // ERROR HERE: C\.ushort
_ C.uint = "ui" // ERROR HERE: C\.uint
_ C.ulong = "ul" // ERROR HERE: C\.ulong
_ C.longlong = "ll" // ERROR HERE: C\.longlong
_ C.ulonglong = "ull" // ERROR HERE: C\.ulonglong
_ C.complexfloat = "cf" // ERROR HERE: C\.complexfloat
_ C.complexdouble = "cd" // ERROR HERE: C\.complexdouble
)
// issue 13830
// cgo converts C void* to Go unsafe.Pointer, so despite appearances C
// void** is Go *unsafe.Pointer. This test verifies that we detect the
// problem at build time.
{
type v [0]byte
f := func(p **v) {
C.F((**C.v)(unsafe.Pointer(p))) // ERROR HERE
}
var p *v
f(&p)
}
// issue 16116
_ = C.fvi(1) // ERROR HERE
// Issue 16591: Test that we detect an invalid call that was being
// hidden by a type conversion inserted by cgo checking.
{
type x *C.int
var p *x
C.fppi(p) // ERROR HERE
}
// issue 26745
_ = func(i int) int {
// typecheck reports at column 14 ('+'), but types2 reports at
// column 10 ('C').
// TODO(mdempsky): Investigate why, and see if types2 can be
// updated to match typecheck behavior.
return C.i + 1 // ERROR HERE: \b(10|14)\b
}
_ = func(i int) {
// typecheck reports at column 7 ('('), but types2 reports at
// column 8 ('i'). The types2 position is more correct, but
// updating typecheck here is fundamentally challenging because of
// IR limitations.
C.fi(i) // ERROR HERE: \b(7|8)\b
}
C.fi = C.fi // ERROR HERE
}
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