Unless otherwise noted, the Go source files are distributed under the
BSD-style license found in the LICENSE file.

### Download and Install

#### Binary Distributions

Official binary distributions are available at https://go.dev/dl/.

After downloading a binary release, visit https://go.dev/doc/install
for installation instructions.

#### Install From Source

If a binary distribution is not available for your combination of

# Contributing to Go

Go is an open source project.

It is the work of hundreds of contributors. We appreciate your help!

## Before filing an issue

If you are unsure whether you have found a bug, please consider asking in the [golang-nuts mailing
list](https://groups.google.com/forum/#!forum/golang-nuts) or [other forums](https://golang.org/help/) first. If

/* Copyright 2011 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.  */

/* An example of writing a C++ virtual function in Go.  */

%module(directors="1") callback

%{
#include <string>
#include "main.h"
%}

%include "std_string.i"

%feature("director");

/* Copyright 2011 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.  */

/* A trivial example of wrapping a C library using SWIG.  */

%{
#include <stdio.h>
#include <stdlib.h>
%}

%typemap(gotype) const char * "string"
%typemap(in) const char * %{
	$1 = malloc($input.n + 1);
	memcpy($1, $input.p, $input.n);
	$1[$input.n] = '\0';
%}

Because this method of setting GODEBUG defaults was introduced only in Go 1.21,
programs listing versions of Go earlier than Go 1.20 are configured to match Go 1.20,
not the older version.

To override these defaults, a main package's source files
can include one or more `//go:debug` directives at the top of the file
(preceding the `package` statement).
Continuing the `panicnil` example, if the module or workspace is updated

pkg syscall (freebsd-arm64), const IP_ADD_SOURCE_MEMBERSHIP = 70
pkg syscall (freebsd-arm64), const IP_ADD_SOURCE_MEMBERSHIP ideal-int
pkg syscall (freebsd-arm64), const IP_BINDANY = 24
pkg syscall (freebsd-arm64), const IP_BINDANY ideal-int
pkg syscall (freebsd-arm64), const IP_BLOCK_SOURCE = 72
pkg syscall (freebsd-arm64), const IP_BLOCK_SOURCE ideal-int
pkg syscall (freebsd-arm64), const IP_DEFAULT_MULTICAST_LOOP = 1

pkg syscall (darwin-arm64), const IP_ADD_MEMBERSHIP = 12
pkg syscall (darwin-arm64), const IP_ADD_SOURCE_MEMBERSHIP = 70
pkg syscall (darwin-arm64), const IP_ADD_SOURCE_MEMBERSHIP ideal-int
pkg syscall (darwin-arm64), const IP_BLOCK_SOURCE = 72
pkg syscall (darwin-arm64), const IP_BLOCK_SOURCE ideal-int
pkg syscall (darwin-arm64), const IP_BOUND_IF = 25
pkg syscall (darwin-arm64), const IP_BOUND_IF ideal-int

pkg math/rand/v2, type ChaCha8 struct #61716
pkg math/rand/v2, type PCG struct #61716
pkg math/rand/v2, type Rand struct #61716
pkg math/rand/v2, type Source interface { Uint64 } #61716
pkg math/rand/v2, type Source interface, Uint64() uint64 #61716
pkg math/rand/v2, type Zipf struct #61716
pkg net, method (*TCPConn) WriteTo(io.Writer) (int64, error) #58808
pkg net/http, func FileServerFS(fs.FS) Handler #51971

On Windows, [EvalSymlinks] no longer evaluates mount points,
which was a source of many inconsistencies and bugs.
This behavior is controlled by the `winsymlink` setting.
For Go 1.23, it defaults to `winsymlink=1`.
Previous versions default to `winsymlink=0`.

On Windows, [EvalSymlinks] no longer tries to normalize
volumes to drive letters, which was not always even possible.
This behavior is controlled by the `winreadlinkvolume` setting.

pkg syscall (freebsd-riscv64), const IP_ADD_SOURCE_MEMBERSHIP = 70 #53466
pkg syscall (freebsd-riscv64), const IP_ADD_SOURCE_MEMBERSHIP ideal-int #53466
pkg syscall (freebsd-riscv64), const IP_BINDANY = 24 #53466
pkg syscall (freebsd-riscv64), const IP_BINDANY ideal-int #53466
pkg syscall (freebsd-riscv64), const IP_BLOCK_SOURCE = 72 #53466
pkg syscall (freebsd-riscv64), const IP_BLOCK_SOURCE ideal-int #53466