diff options
| author | Karen Arutyunov <karen@codesynthesis.com> | 2017-08-31 03:43:11 +0300 |
|---|---|---|
| committer | Karen Arutyunov <karen@codesynthesis.com> | 2017-08-31 03:43:11 +0300 |
| commit | b8a96d789253c91093476f898611d5903799e84e (patch) | |
| tree | 510bad1358bc443a0b47a1fd8c9d55057c4fa411 /libbutl/regex.txx | |
| parent | 0cf84e1f006988c114bdca36715d3a2c0601a7d5 (diff) | |
Fix regex_replace_ex() to ignore unmatched sub-expression references
Diffstat (limited to 'libbutl/regex.txx')
| -rw-r--r-- | libbutl/regex.txx | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/libbutl/regex.txx b/libbutl/regex.txx index 536cabf..dd1a539 100644 --- a/libbutl/regex.txx +++ b/libbutl/regex.txx @@ -169,9 +169,10 @@ namespace butl if (si > 0) { - // m[0] refers to the matched substring. + // m[0] refers to the matched substring. Note that we + // ignore unmatched sub-expression references. // - if (static_cast<size_t> (si) < m.size ()) + if (static_cast<size_t> (si) < m.size () && m[si].matched) append_str (m[si].first, m[si].second); } else @@ -212,9 +213,10 @@ namespace butl int si (digit (c)); if (si > 0) { - // m[0] refers to the matched substring. + // m[0] refers to the matched substring. Note that we + // ignore unmatched sub-expression references. // - if (static_cast<size_t> (si) < m.size ()) + if (static_cast<size_t> (si) < m.size () && m[si].matched) append_str (m[si].first, m[si].second); } else |