)

func f() int {
	d++
	return d
}
</pre>

<p>
the initialization order is <code>d</code>, <code>b</code>, <code>c</code>, <code>a</code>.
Note that the order of subexpressions in initialization expressions is irrelevant:
<code>a = c + b</code> and <code>a = b + c</code> result in the same initialization
order in this example.
</p>

<p>

)

func f() int {
	d++
	return d
}
</pre>

<p>
the initialization order is <code>d</code>, <code>b</code>, <code>c</code>, <code>a</code>.
Note that the order of subexpressions in initialization expressions is irrelevant:
<code>a = c + b</code> and <code>a = b + c</code> result in the same initialization
order in this example.
</p>

<p>

	{"(?P<x>hi)|(?P<x>bye)", "hello $$x", "hi", "hello $x"},
	{"a+", "${oops", "aaa", "${oops"},
	{"a+", "$$", "aaa", "$"},
	{"a+", "$", "aaa", "$"},

	// Substitution when subexpression isn't found
	{"(x)?", "$1", "123", "123"},
	{"abc", "$1", "123", "123"},

	// Substitutions involving a (x){0}
	{"(a)(b){0}(c)", ".$1|$3.", "xacxacx", "x.a|c.x.a|c.x"},

		if m == nil {
			if srv.pathPrefix != "" {
				return nil, importErrorf(importPath, "invalid %s import path %q", srv.pathPrefix, importPath)
			}
			continue
		}

		// Build map of named subexpression matches for expand.
		match := map[string]string{
			"prefix": srv.pathPrefix + "/",
			"import": importPath,
		}
		for i, name := range srv.regexp.SubexpNames() {
			if name != "" && match[name] == "" {