C-Free - A Professional Excellent C/C++ IDE

You can use regular expression in "Find" Dialog, "Replace" Dialog and "Find in Files" Dialog.

Regular expressions allow more complex search and replace functions to be performed in a single operation. C-Free support Perl style regular expressions. The Perl regular expression syntax is based on that used by the programming language Perl.

Regular Expressions (C-Free support):

Symbol	Function
.	Matches any single character except a newline character. Does not match repeated newlines.
[xyz]	A character set. Matches any characters between brackets.
[^xyz]	A negative character set. Matches any characters NOT between brackets including newline characters.
[a-z]	Specifies a range of characters.
[^a-z]	Negates the character class, causing it to match a single character not listed in the character class.
\	Indicates the next character has a special meaning. "n" on it¡¯s own matches the character "n". "\n" matches a linefeed or newline character. See examples below (\d, \f, \n etc).
^	Matches/anchors the beginning of line.
$	Matches/anchors the end of line.
x| y	Causes the regex engine to match either the part on the left side, or the part on the right side.
*	Matches the preceding character zero or more times.
+	Matches the preceding character one or more times. Does not match repeated newlines.
?	Matches any single character except newline.
{n}	Repeats the previous item exactly n times.
{m,n}	Repeats the previous item between m and n times.
{m,}	Repeats the previous item at least m times.

 Regular Expressions (C-Free syntax):

Symbol	Function
\P	Matches whitespaces.
\I	Matches C/C++ identifier.
\C	Matches C/C++ character.
\S	Matches C/C++ string.
\N	Matches numbers.
\D	Matches decimal number.
\H	Matches hexadecimal number.
\O	Matches octal number.
\F	Matches float number.