t.Errorf("split(%q): got %q expected %q", inLine, got, expected)
	}

	const val = "someNewValue"
	os.Setenv("_Z", val)

	// try again with the properly-escaped variable.

	inLine = "//go:generate -command CMD2 \"ab${DOLLAR}{_Z}cd\""
	expected = []string{"-command", "CMD2", "ab${_Z}cd"}
	got = g.split(inLine + "\n")

	if !reflect.DeepEqual(got, expected) {

//  BOOST_VERSION / 100000 is the major version

#define BOOST_VERSION 105500

//
//  BOOST_LIB_VERSION must be defined to be the same as BOOST_VERSION
//  but as a *string* in the form "x_y[_z]" where x is the major version
//  number, y is the minor version number, and z is the patch level if not 0.
//  This is used by <config/auto_link.hpp> to select which library version to link to.

#define BOOST_LIB_VERSION "1_55"

00000010  59 17 86 df 90 2f 73 e0  a0 5c 6e 28 09 78 69 d6  |Y..../s..\n(.xi.|
00000020  30 06 b7 7b 17 a9 79 30  2a d8 57 20 c5 5c ed 86  |0..{..y0*.W .\..|
00000030  15 f4 3b c8 d2 5f 7a 80  2a 6a cd 40 c2 da 6f a8  |..;.._z.*j.@..o.|
00000040  cd d7 e7 bf 48 bd fb a1  e9 4b 9b a9 00 04 00 2f  |....H....K...../|
00000050  00 ff 01 00 00 b9 00 23  00 79 00 00 00 00 00 00  |.......#.y......|

00000020  5d 9d 44 36 17 03 03 00  35 1b 51 a9 b1 ce 11 ed  |].D6....5.Q.....|
00000030  95 47 34 b9 3d 2f 6e 27  b2 e5 31 54 7f e3 8a 11  |.G4.=/n'..1T....|
00000040  fd 54 75 2c b6 8a 56 25  00 29 a7 5f 7a 1e 16 be  |.Tu,..V%.)._z...|
00000050  16 e3 86 3a 72 84 0e bc  40 ef fd ad 18 33        |...:r...@....3|
>>> Flow 4 (server to client)
00000000  17 03 03 00 8b 69 2e 81  c4 4d 43 a6 1f 96 b7 8e  |.....i...MC.....|

000003e0  f2 8d bb ab b3 23 09 a1  d1 9c 40 3e e4 84 d3 1c  |.....#....@>....|
000003f0  60 64 5c ff 01 c7 78 69  c2 4a fb e1 c3 d6 f0 57  |`d\...xi.J.....W|
00000400  fa 3a 5f 7a 8b 70                                 |.:_z.p|
>>> Flow 5 (client to server)
00000000  17 03 03 00 35 24 4a 53  55 49 92 7a 21 a2 db 69  |....5$JSUI.z!..i|
00000010  e5 2b 00 29 83 cb 91 32  17 48 73 96 89 d1 b2 11  |.+.)...2.Hs.....|

// error will be ErrNotMangledName.
// This function does not currently support Rust symbol names.
func ToAST(name string, options ...Option) (AST, error) {
	if strings.HasPrefix(name, "_Z") {
		a, err := doDemangle(name[2:], options...)
		return a, adjustErr(err, 2)
	}

	if strings.HasPrefix(name, "___Z") {
		// clang extensions
		block := strings.LastIndex(name, "_block_invoke")

	Sm     = _Sm // Sm is the set of Unicode characters in category Sm (Symbol, math).
	So     = _So // So is the set of Unicode characters in category So (Symbol, other).
	Space  = _Z  // Space/Z is the set of Unicode space characters, category Z.
	Z      = _Z
	Symbol = _S // Symbol/S is the set of Unicode symbol characters, category S.
	S      = _S
	Title  = _Lt // Title is the set of Unicode title case letters.

X�5���)�/�a /CW���'������0O%G����w��ǝE��8��{�1Y,'`�n���:X��e��ÿ~�}kPv�)��9�TV-�����y�L �%�Y����]��u��ܖֵ�C 3�]G1u�� �&0�Yf1K VTD([�mY
���թ�z��i)�T��h����{�)B�H +�E[�- ��Թ8j�u�l�VKб���@#�ݰ= ��mB���g��'�w�tNO���Efd�(������( �D�1��_z^T"��A�Ȧӽ_���Z�Cl���ũ�~�iA�zU��L�ʮ_��h�4I4I��욮��=�γ1t����ߖz'h8K-Z �������o���Pڇ_��j;5�ЭϣJ��n����U�q��R|��e|/-�^�O}B�-�uع��vA���ο���h�w�Ͷ��diC}��ʵW���d���p��x�9OҾy��mߜ_����6�S]_|�닯u}�/����/u}�+�_�½������s��![�*/����o��"Jr: YR�Q�@�$mM"�3...

!�� !���H��
�$H��a$H6��C��Z�mkm�Hv�[&�[[m������ɢ�ɢ�ۤ� @$�I�
$H��
bH`� $�Iuo`�S�:C��Y)��y6E��ɼyM�}d����U6�"���l���Ȫ�l���ȯ@��9�9��5mʛ�6 孨ܗ���z�T��Y,
a===MB1�����(-Uc� ��ܨ,��ӻ��N��;�� H�"
� H������C�u��gt��/t��.�_z�(Ez�}�� ��(�A �=ӹ�y��®�U�Wy�� K!Q!��=ӹ�x���Wl��y盽��t�
$H� @$�I�,I !�� !������{;s�1AY&SY�Q��g߀{p�0`4z�T��A�TjŒ����Ac��CE�
�|Hل�ivp����ډ�O�Ѓ��(.u{|!�ӆ���!$�u�6�{�tY&��ϛm��������E����n��UUU7 ...

252_\254\014\353?0\033\275\262!(\323?X\207\031\303\300g\356?\275\242\261\rJ\260\346?\343\025\222=\304\312\343?\234\260\231\215\362w\317?\200\207\'\026\222\300\203?@\277\377/\220\200\252?\306R\207\237k\036\327?\205\332VN\005\337\353? )\017?M\243\233?_Z&\265\r\371\340?\364-]j\316\307\337?L?\204\010[\304\330?RF\254\346;\366\324?a\000Pb.k\350?.\374\341*Q\r\355?\357\236\306\305\344\333\347?Na\231\363\037\372\345?\236R\345\214\314\257\322?\241mU3\005\037\346?\275.\360\n\"\317\353?\254J\371\037P\311\33...