The Search Result
Whenever we verify if a piece of text satisfies our regular expression, we have to store the results somewhere. std::match_results allows us to do just that.
We'll cover the following
The object of type std::match_results
is the result of an std::regex_match
or std::regex_search
. std::match_results
is a sequential container having at least one capture group of an std::sub_match
object. The std::sub_match
objects are sequences of characters.
ℹ️ What is a capture group?
Capture groups allow us to further analyse the search results of a regular expression. They are defined by a pair of parentheses()
. The regular expression((a+)(b+)(c+))
has four capture groups:((a+)(b+)(c+)), (a+), (b+)
, and(c+)
. The total result is the 0th capture group.
C++ has four types of synonyms of type std::match_results
:
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