The RegularExpression 'matches' function no longer returns the start and end
position of a match
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Key: XERCESC-1910
URL: https://issues.apache.org/jira/browse/XERCESC-1910
Project: Xerces-C++
Issue Type: Bug
Components: Utilities
Affects Versions: 3.0.1
Environment: Windows
Reporter: Steve Roberts
We have recently upgraded from version 2.2.0 to version 3.0.1. Between these
versions a change was made to the RegularExpression::matchUnion function, so
that it now uses a local version of the context structure. The result of this
is that the 'fMatch' member of the context can be changed from its original
instance. Therefore, back in the RegularExpression::matches function, just
before it returns, it sets the start and end position of the match:
context.fMatch->setStartPos(0, (int)matchStart);
context.fMatch->setEndPos(0, matchEnd);
However, the 'fMatch' object no longer matches the one that was passed through
to function (due to what happened in 'matchUnion') and therefore these values
don't get returned to the calling function.
Therefore, I think that in the 'matches' function is should actually be setting
the start and end position of the 'pMatch' property that is passed into the
function, rather than the 'context.fMatch'.
The code we are using to call the regular expression is this:
XERCES_CPP_NAMESPACE::RegularExpression re(expression.c_str());
if( re.matches( text, &match ) )
{ ...
where expression = "([\-\(]?\d{1,3}([,
]\d{3})+\.\d+[\)]?|[\-\(]?\d+\.\d+[\)]?).*"
and text = "13.13"
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