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News about PCRE releases |
News about PCRE releases |
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Release 6.5 01-Feb-06 |
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Important changes in this release: |
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1. A number of new features have been added to pcregrep. |
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2. The Unicode property tables have been updated to Unicode 4.1.0, and the |
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supported properties have been extended with script names such as "Arabic", |
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and the derived properties "Any" and "L&". This has necessitated a change to |
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the interal format of compiled patterns. Any saved compiled patterns that |
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use \p or \P must be recompiled. |
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3. The specification of recursion in patterns has been changed so that all |
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recursive subpatterns are automatically treated as atomic groups. Thus, for |
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example, (?R) is treated as if it were (?>(?R)). This is necessary because |
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otherwise there are situations where recursion does not work. |
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See the ChangeLog for a complete list of changes, which include a number of bug |
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fixes and tidies. |
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Release 6.0 07-Jun-05 |
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The release number has been increased to 6.0 because of the addition of several |
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major new pieces of functionality. |
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A new function, pcre_dfa_exec(), which implements pattern matching using a DFA |
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algorithm, has been added. This has a number of advantages for certain cases, |
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though it does run more slowly, and lacks the ability to capture substrings. On |
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the other hand, it does find all matches, not just the first, and it works |
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better for partial matching. The pcrematching man page discusses the |
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differences. |
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The pcretest program has been enhanced so that it can make use of the new |
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pcre_dfa_exec() matching function and the extra features it provides. |
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The distribution now includes a C++ wrapper library. This is built |
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automatically if a C++ compiler is found. The pcrecpp man page discusses this |
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interface. |
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The code itself has been re-organized into many more files, one for each |
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function, so it no longer requires everything to be linked in when static |
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linkage is used. As a consequence, some internal functions have had to have |
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their names exposed. These functions all have names starting with _pcre_. They |
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are undocumented, and are not intended for use by outside callers. |
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The pcregrep program has been enhanced with new functionality such as |
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multiline-matching and options for output more matching context. See the |
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ChangeLog for a complete list of changes to the library and the utility |
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programs. |
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Release 5.0 13-Sep-04 |
Release 5.0 13-Sep-04 |
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