// Go tree. The default path is the value of the GOPATH environment
// variable, interpreted as a path list appropriate to the operating system
// (on Unix, the variable is a colon-separated string;
// on Windows, a semicolon-separated string;
// on Plan 9, a list).
//
// Each directory listed in the Go path must have a prescribed structure:
//

        .add("foo : bak") // Name trailing whitespace is trimmed.
        .add("\tkey\t:\tvalue\t") // '\t' also counts as whitespace
        .add("ping:  pong  ") // Value whitespace is trimmed.
        .add("kit:kat") // Space after colon is not required.
        .build()
    assertThat(headers.values("foo")).containsExactly("bar", "baz", "bak")
    assertThat(headers.values("key")).containsExactly("value")

	// IPv6 with invalid embedded IPv4.
	"::ffff:192.168.140.bad",
	// IPv6 with multiple ellipsis ::.
	"fe80::1::1",
	// IPv6 with invalid non hex/colon character.
	"fe80:1?:1",
	// IPv6 with truncated bytes after single colon.
	"fe80:",
	// AddrPort strings.
	"1.2.3.4:51820",
	"[fd7a:115c:a1e0:ab12:4843:cd96:626b:430b]:80",
	"[::ffff:c000:0280]:65535",
	"[::ffff:c000:0280%eth0]:1",

            // broken SPDY versions of the response cache).
            addLenient("", line.substring(1)) // Empty header name.
          }
          else -> {
            // No header name.
            addLenient("", line)
          }
        }
      }

    /** Add an header line containing a field name, a literal colon, and a value. */
    fun add(line: String) =

[[sec:project_path]]
== Multi-Project path

A project path has the following pattern: it starts with an optional colon, which denotes the root project.

The root project, `:`, is the only project in a path not specified by its name.

The rest of a project path is a colon-separated sequence of project names, where the next project is a subproject of the previous project:

[source]
----
:sub-project-1

	if g, w := len(certDirs), len(rootPEMs); g != w {
		t.Fatalf("Failed sanity check: len(certsDir)=%d is not equal to len(rootsPEMS)=%d", g, w)
	}

	// Now finally concatenate them with a colon.
	colonConcatCertDirs := strings.Join(certDirs, ":")
	os.Setenv(certDirEnv, colonConcatCertDirs)
	gotPool, err := loadSystemRoots()
	if err != nil {
		t.Fatalf("Failed to load system roots: %v", err)
	}

	// e.g. Forwarded: for=192.0.2.60;proto=https;by=203.0.113.43
	forwarded = http.CanonicalHeaderKey("Forwarded")
	// Allows for a sub-match of the first value after 'for=' to the next
	// comma, semi-colon or space. The match is case-insensitive.
	forRegex = regexp.MustCompile(`(?i)(?:for=)([^(;|,| )]+)(.*)`)
	// Allows for a sub-match for the first instance of scheme (http|https)
	// prefixed by 'proto='. The match is case-insensitive.

	colon := strings.Index(arg, ":")
	if colon < 0 {
		return "", arg
	}
	openparen := strings.Index(arg, "(")
	if openparen < 0 {
		log.Fatalf("splitNameExpr(%q): colon but no open parens", arg)
	}
	if colon > openparen {
		// colon is inside the parens, such as in "(Foo x:(Bar))".
		return "", arg
	}
	return arg[:colon], arg[colon+1:]
}

		{
			name:     "IPv6 missing brackets",
			input:    "2001:db8::20:9080",
			expected: "",
			errStr:   "address 2001:db8::20:9080: too many colons in address",
			lookup:   nil,
		},
		{
			name:     "Colon, but no port",
			input:    "localhost:",
			expected: "",
			errStr:   "",
			lookup:   nil,
		},
		{
			name:     "Missing port",
			input:    "localhost",
			expected: "",

fail), and then re-running the tests using the devel toolchain.


- Regexps comments syntax

Instructions to match are specified inside plain comments that start
with an architecture tag, followed by a colon and a quoted Go-style
regexp to be matched. For example, the following test:

  func Sqrt(x float64) float64 {
  	   // amd64:"SQRTSD"
  	   // arm64:"FSQRTD"
  	   return math.Sqrt(x)
  }