{"//line foo.go:10:4\n", "foo.go:10:4:"},   // column means print a column
	{"//line foo.go:10:4\n\n", "foo.go:11:1:"}, // relative columns start at 1 after newline

	{"/*line :10*/", ":10:"},
	{"/*line :10:4*/", "filename:10:4"},
	{"/*line foo.go:10*/", "foo.go:10:"},
	{"/*line foo.go:10:4*/", "foo.go:10:4:"},
	{"/*line foo.go:10:4*/\n", "foo.go:11:1:"},
}

func main() {

    @Nonnull
    default MessageBuilder a(Object value) {
        return append(String.valueOf(value));
    }

    /**
     * Append newline to the message buffer.
     *
     * @return the current builder
     */
    @Nonnull
    default MessageBuilder newline() {
        return append(System.lineSeparator());
    }

    /**
     * Append formatted content to the buffer.

    private static final Action<AnsiContext> NEW_LINE_ACTION = new Action<AnsiContext>() {
        @Override
        public void execute(AnsiContext ansi) {
            ansi.newLine();
        }
    };
    private static final int CHARS_PER_TAB_STOP = 8;
    private final Cursor writePos = new Cursor();
    private final AnsiExecutor ansiExecutor;

	<-<-chan int // ERROR "unexpected <-, expected chan|expecting {" (new parser: same error as for type decl)

	type _ <-chan<-int // ERROR "unexpected int, expected chan|expected .*chan.*|expected chan|expected .*;.* or .*}.* or newline"
	<-chan<-int // ERROR "unexpected int, expected chan|expecting {" (new parser: same error as for type decl)

	if b.Col() == 0 {
		// base column is unknown => relative column is unknown
		// (the current specification for line directives requires
		// this to apply until the next PosBase/line directive,
		// not just until the new newline)
		return 0
	}
	if pos.Line() == b.Pos().Line() {
		// pos on same line as pos base => column is relative to pos base
		return b.Col() + (pos.Col() - b.Pos().Col())
	}
	return pos.Col()
}

	}
	r.recordsRead = len(r.current)
	if r.err == nil {
		r.err = io.EOF
	}
	return r.readCloser.Close()
}

// nextSplit will attempt to skip a number of bytes and
// return the buffer until the next newline occurs.
// The last block will be sent along with an io.EOF.
func (r *PReader) nextSplit(skip int, dst []byte) ([]byte, error) {
	if cap(dst) < skip {
		dst = make([]byte, 0, skip+1024)
	}
	dst = dst[:skip]

	}{
		{
			name: "no_newline",
			in:   "foo: a b",
			want: &nssConf{
				sources: map[string][]nssSource{
					"foo": {{source: "a"}, {source: "b"}},
				},
			},
		},
		{
			name: "newline",
			in:   "foo: a b\n",
			want: &nssConf{
				sources: map[string][]nssSource{
					"foo": {{source: "a"}, {source: "b"}},
				},
			},
		},
		{
			name: "whitespace",
			in:   "   foo:a    b    \n",

		if panicIdx == -1 {
			log.Fatalf("expected a panic in output for %s, got: %s", tc.Type, out)
		}
		eolIdx := bytes.IndexByte(out[panicIdx:], '\n') + panicIdx
		if panicIdx == -1 {
			log.Fatalf("expected a newline in output for %s after the panic, got: %s", tc.Type, out)
		}
		out = out[0:eolIdx]
		if string(out) != tc.Expect {
			log.Fatalf("expected '%s' for panic(%s(%s)), got %s", tc.Expect, tc.Type, tc.Input, out)
		}
	}

	}{
		{name: "empty", args: nil, want: ""},
		{name: "one", args: []string{"a"}, want: "a"},
		{name: "two", args: []string{"a", "b"}, want: "a b"},
		{name: "space", args: []string{"a ", "b"}, want: "'a ' b"},
		{name: "newline", args: []string{"a\n", "b"}, want: "'a\n' b"},
		{name: "quote", args: []string{`'a `, "b"}, want: `"'a " b`},
		{name: "unquoteable", args: []string{`'"`}, wantErr: "contains both single and double quotes and cannot be quoted"},

	if err != nil {
		t.Fatalf("pattern %q did not compile: %s", pattern, err)
	}
	if !matched {
		t.Error("message did not match pattern")
	}

	// Ensure that a newline is added only if the buffer lacks a newline suffix.
	b.Reset()
	l.SetFlags(0)
	l.SetPrefix("\n")
	l.Output(0, "")
	if got := b.String(); got != "\n" {
		t.Errorf("message mismatch:\ngot  %q\nwant %q", got, "\n")
	}
}