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Diffstat (limited to 'doc/pcre2test.txt')
| -rw-r--r-- | doc/pcre2test.txt | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/doc/pcre2test.txt b/doc/pcre2test.txt index ca3b7e3..cbe3528 100644 --- a/doc/pcre2test.txt +++ b/doc/pcre2test.txt @@ -1303,8 +1303,10 @@ SUBJECT MODIFIERS Testing substitute callouts If the substitute_callout modifier is set, a substitution callout func- - tion is set up. When it is called (after each substitution), details of - the the input and output strings are output. For example: + tion is set up. The null_context modifier must not be set, because the + address of the callout function is passed in a match context. When the + callout function is called (after each substitution), details of the + the input and output strings are output. For example: /abc/g,replace=<$0>,substitute_callout abcdefabcpqr @@ -1457,11 +1459,11 @@ SUBJECT MODIFIERS Passing a NULL context Normally, pcre2test passes a context block to pcre2_match(), - pcre2_dfa_match() or pcre2_jit_match(). If the null_context modifier is - set, however, NULL is passed. This is for testing that the matching - functions behave correctly in this case (they use default values). This - modifier cannot be used with the find_limits modifier or when testing - the substitution function. + pcre2_dfa_match(), pcre2_jit_match() or pcre2_substitute(). If the + null_context modifier is set, however, NULL is passed. This is for + testing that the matching and substitution functions behave correctly + in this case (they use default values). This modifier cannot be used + with the find_limits or substitute_callout modifiers. THE ALTERNATIVE MATCHING FUNCTION @@ -1888,5 +1890,5 @@ AUTHOR REVISION - Last updated: 11 February 2019 + Last updated: 11 March 2019 Copyright (c) 1997-2019 University of Cambridge. |