go generate -run . -skip th..sand './generate/flag.go'
stdout 'yes' # flag.go should select yes
! stdout 'no' # flag.go should not select no

# Test go generate provides the right "$GOPACKAGE" name in an x_test
go generate './generate/env_test.go'
stdout 'main_test'

# Test go generate provides the right "$PWD"
go generate './generate/env_pwd.go'
stdout $WORK'[/\\]gopath[/\\]src[/\\]generate'

-- echo.go --
package main

import (

	Direct bool // imported directly
}

// NewPkg returns a new Pkg for the given package path and name.
// Unless name is the empty string, if the package exists already,
// the existing package name and the provided name must match.
func NewPkg(path, name string) *Pkg {
	if p := pkgMap[path]; p != nil {
		if name != "" && p.Name != name {
			panic(fmt.Sprintf("conflicting package names %s and %s for path %q", p.Name, name, path))
		}

// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

/*
Package slog provides structured logging,
in which log records include a message,
a severity level, and various other attributes
expressed as key-value pairs.

It defines a type, [Logger],
which provides several methods (such as [Logger.Info] and [Logger.Error])
for reporting events of interest.

// license that can be found in the LICENSE file.

//go:build lldb

// Used by gcc_signal_darwin_arm64.c when doing the test build during cgo.
// We hope that for real binaries the definition provided by Go will take precedence
// and the linker will drop this .o file altogether, which is why this definition
// is all by itself in its own file.

### New unique package

The new [unique] package provides facilities for
canonicalizing values (like "interning" or "hash-consing").

Any value of comparable type may be canonicalized with the new
`Make[T]` function, which produces a reference to a canonical copy of
the value in the form of a `Handle[T]`.
Two `Handle[T]` are equal if and only if the values used to produce the
handles are equal, allowing programs to deduplicate values and reduce

// Copyright 2009 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 provides the Accept function used on all systems
// other than arm. See syscall_linux_accept.go for why.

//go:build linux && !arm

package syscall

func Accept(fd int) (nfd int, sa Sockaddr, err error) {
	var rsa RawSockaddrAny
	var len _Socklen = SizeofSockaddrAny

a <code>SetFinalizer</code> function that adds a finalizer to be called when
a particular object is no longer reachable by the program.
A call to <code>SetFinalizer(x, f)</code> is synchronized before the finalization call <code>f(x)</code>.
</p>

<h3 id="more">Additional Mechanisms</h3>

<p>
The <code>sync</code> package provides additional synchronization abstractions,

	// WriteHeader sends an HTTP response header with the provided
	// status code.
	//
	// If WriteHeader is not called explicitly, the first call to Write
	// will trigger an implicit WriteHeader(http.StatusOK).
	// Thus explicit calls to WriteHeader are mainly used to
	// send error codes or 1xx informational responses.
	//
	// The provided code must be a valid HTTP 1xx-5xx status code.

// 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.

// Package str provides string manipulation utilities.
package str

import (
	"fmt"
	"strings"
	"unicode"
	"unicode/utf8"
)

// StringList flattens its arguments into a single []string.
// Each argument in args must have type string or []string.