The reg Namespace Reference

Namespace for the regular expression functions. More...

Definition

namespace reg { ... }

Classes Index

class	Ex
	Class representing a regular expression. More...
class	Iterator
	Class to iterate through matches. More...
class	Match
	Object representing the matching results. More...
class	PToken
	Class representing a token in the compiled regular expression token stream. More...
class	SubMatch
	Object representing the match results of a capture range. More...

Functions Index

static bool	isspace (char c)
static bool	isalpha (char c)
static bool	isdigit (char c)
static bool	isalnum (char c)
static std::string	wildcard2regex (std::string_view pattern)
bool	search (std::string_view str, Match &match, const Ex &re, size_t pos=0)
	Search in a given string str starting at position pos for a match against regular expression re. More...
bool	search (std::string_view str, const Ex &re, size_t pos=0)
	Search in a given string str starting at position pos for a match against regular expression re. More...
bool	match (std::string_view str, Match &match, const Ex &re)
	Matches a given string str for a match against regular expression re. More...
bool	match (std::string_view str, const Ex &re)
	Matches a given string str for a match against regular expression re. More...
std::string	replace (std::string_view str, const Ex &re, std::string_view replacement)
	Searching in a given input string for parts that match regular expression re and replaces those parts by string replacement. More...

Description

Namespace for the regular expression functions.

Functions

isalnum()

bool reg::isalnum (char c)

inline static

Definition at line 48 of file regex.cpp.

48static inline bool isalnum(char c)

49{

50 return isalpha(c) || isdigit(c);

51}

References isalpha and isdigit.

Referenced by reg::Ex::Private::matchAt.

isalpha()

bool reg::isalpha (char c)

inline static

Definition at line 38 of file regex.cpp.

38static inline bool isalpha(char c)

39{

40 return static_cast<unsigned char>(c)>=128 || (c>='a' && c<='z') || (c>='A' && c<='Z');

41}

Referenced by isalnum and reg::Ex::Private::matchAt.

isdigit()

bool reg::isdigit (char c)

inline static

Definition at line 43 of file regex.cpp.

43static inline bool isdigit(char c)

44{

45 return c>='0' && c<='9';

46}

Referenced by isalnum and reg::Ex::Private::matchAt.

isspace()

bool reg::isspace (char c)

inline static

Definition at line 33 of file regex.cpp.

33static inline bool isspace(char c)

34{

35 return c==' ' || c=='\t' || c=='\n' || c=='\r';

36}

Referenced by reg::Ex::Private::matchAt.

match()

bool reg::match (std::string_view str, Match & match, const Ex & re)

Matches a given string str for a match against regular expression re.

Returns true iff a match was found for the whole string. Any capture groups are returned via the match object.

Definition at line 759 of file regex.cpp.

759bool match(std::string_view str,Match &match,const Ex &re)

760{

761 return re.match(str,match,0) && match.position()==0 && match.length()==str.length();

762}

References reg::Ex::match and match.

Referenced by dateTimeFromString, endBrief, genericPatternMatch, getFilterFromList, DocParser::handleStyleArgument, VhdlDocGen::isNumber, match, match, replace, search, search, setOutput and LayoutParser::startLayout.

match()

bool reg::match (std::string_view str, const Ex & re)

Matches a given string str for a match against regular expression re.

Returns true iff a match was found for the whole string.

Definition at line 764 of file regex.cpp.

764bool match(std::string_view str,const Ex &re)

765{

766 Match match;

767 return re.match(str,match,0) && match.position()==0 && match.length()==str.length();

768}

References reg::Ex::match and match.

replace()

std::string reg::replace (std::string_view str, const Ex & re, std::string_view replacement)

Searching in a given input string for parts that match regular expression re and replaces those parts by string replacement.

Definition at line 770 of file regex.cpp.

770std::string replace(std::string_view str,const Ex &re,std::string_view replacement)

771{

772 std::string result;

773 Match match;

774 size_t p=0;

775 while (re.match(str,match,p))

776 {

777 size_t i=match.position();

778 size_t l=match.length();

779 if (i>p) result+=str.substr(p,i-p);

780 result+=replacement;

781 p=i+l;

782 }

783 if (p<str.length()) result+=str.substr(p);

784 return result;

785}

References reg::Ex::match and match.

Referenced by VhdlDocGen::addBaseClass, VHDLOutlineParser::checkInlineCode, FlowChart::printNode and replaceAnonymousScopes.

search()

bool reg::search (std::string_view str, Match & match, const Ex & re, size_t pos=0)

Search in a given string str starting at position pos for a match against regular expression re.

Returns true iff a match was found. Details of what part of the string has matched is returned via the match object.

An example to show how to match all identifiers in a string.

 static reg::Ex re(R"(\a\w*)");

 std::string = u8"void(Func是<B_C::Códe42>(42));";

 while (reg::search(str,match,re,pos))

 {

  std::cout << match.str() << std::endl;

  pos=match.position()+match.length();

 }

produces:

 void

 Func是

 B_C

 Códe42

See Also

Ex::Ex() for details on the regular expression patterns.

Definition at line 748 of file regex.cpp.

748bool search(std::string_view str,Match &match,const Ex &re,size_t pos)

749{

750 return re.match(str,match,pos);

751}

References reg::Ex::match and match.

Referenced by HtmlHelpIndex::addItem, addValidAliasToMap, addVariable, addVariableToFile, VHDLOutlineParser::checkInlineCode, containsEnvVar, MemberDefImpl::displayDefinition, expandAliasRec, Markdown::Private::extractTitleId, findFunctionPtr, findIndex, MemberDefImpl::getClassDefOfAnonymousType, FormulaManager::initFromRepository, insertDimension, isVarWithConstructor, loadExtensions, loadStylesheet, matchExcludedSymbols, MarkdownOutlineParser::parseInput, runQHelpGenerator, StyleData::setStyle, simplifyTypeForTable, splitKnRArg, StyleData::StyleData, DotAttributes::updateValue, MemberDefImpl::writeDeclaration and MemberDefImpl::writeDocumentation.

search()

bool reg::search (std::string_view str, const Ex & re, size_t pos=0)

Search in a given string str starting at position pos for a match against regular expression re.

Returns true iff a match was found.

Definition at line 753 of file regex.cpp.

753bool search(std::string_view str,const Ex &re,size_t pos)

754{

755 Match match;

756 return re.match(str,match,pos);

757}

References reg::Ex::match and match.

wildcard2regex()

std::string reg::wildcard2regex (std::string_view pattern)

static

Definition at line 649 of file regex.cpp.

649static std::string wildcard2regex(std::string_view pattern)

650{

651 std::string result="^"; // match start of input

652 result.reserve(pattern.length());

653 for (size_t i=0;i<pattern.length();i++)

654 {

655 char c=pattern[i];

656 switch(c)

657 {

658 case '*':

659 result+=".*";

660 break; // '*' => '.*'

661 case '?':

662 result+='.';

663 break; // '?' => '.'

664 case '.':

665 case '+':

666 case '\\':

667 case '$':

668 case '^':

669 case '(':

670 case ')':

671 result+='\\'; result+=c; // escape

672 break;

673 case '[':

674 if (i<pattern.length()-1 && pattern[i+1]=='^') // don't escape ^ after [

675 {

676 result+="[^";

677 i++;

678 }

679 else

680 {

681 result+=c;

682 }

683 break;

684 default: // just copy

685 result+=c;

686 break;

687 }

688 }

689 result+='$'; // match end of input

690 return result;

691}

Referenced by reg::Ex::Ex.

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The documentation for this namespace was generated from the following file:

• regex.cpp

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