| 119 |
4. For the same reason, conditional expressions that use a backreference as the |
4. For the same reason, conditional expressions that use a backreference as the |
| 120 |
condition or test for a specific group recursion are not supported. |
condition or test for a specific group recursion are not supported. |
| 121 |
.P |
.P |
| 122 |
5. Callouts are supported, but the value of the \fIcapture_top\fP field is |
5. Because many paths through the tree may be active, the \eK escape sequence, |
| 123 |
|
which resets the start of the match when encountered (but may be on some paths |
| 124 |
|
and not on others), is not supported. It causes an error if encountered. |
| 125 |
|
.P |
| 126 |
|
6. Callouts are supported, but the value of the \fIcapture_top\fP field is |
| 127 |
always 1, and the value of the \fIcapture_last\fP field is always -1. |
always 1, and the value of the \fIcapture_last\fP field is always -1. |
| 128 |
.P |
.P |
| 129 |
6. |
7. |
| 130 |
The \eC escape sequence, which (in the standard algorithm) matches a single |
The \eC escape sequence, which (in the standard algorithm) matches a single |
| 131 |
byte, even in UTF-8 mode, is not supported because the alternative algorithm |
byte, even in UTF-8 mode, is not supported because the alternative algorithm |
| 132 |
moves through the subject string one character at a time, for all active paths |
moves through the subject string one character at a time, for all active paths |
| 181 |
.rs |
.rs |
| 182 |
.sp |
.sp |
| 183 |
.nf |
.nf |
| 184 |
Last updated: 06 March 2007 |
Last updated: 29 May 2007 |
| 185 |
Copyright (c) 1997-2007 University of Cambridge. |
Copyright (c) 1997-2007 University of Cambridge. |
| 186 |
.fi |
.fi |
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