[boost] Regex Question: Explicit Constructor

From: Stephan T. Lavavej (stl_at_[hidden])
Date: 2004-01-14 06:56:05

Why is regex's constructor explicit?  Certainly for something like vector,
you don't want the size constructor to turn into a conversion from int.  But
it seems to me that allowing

regex_merge("  foo  ", "\\A\\s*(.*?)\\s*\\z", "$1")

instead of the current

regex_merge("  foo  ", regex("\\A\\s*(.*?)\\s*\\z"), "$1")

wouldn't introduce any safety issues.  Sure, you could get the order of the
arguments wrong, but you can do that anyways when you're using a temporary
regex.

Stephan T. Lavavej
http://nuwen.net