#include <regex.h>
Inheritance diagram for RegexMatcher:
Public Member Functions | |
RegexMatcher (const UnicodeString ®exp, uint32_t flags, UErrorCode &status) | |
Construct a RegexMatcher for a regular expression. | |
RegexMatcher (const UnicodeString ®exp, const UnicodeString &input, uint32_t flags, UErrorCode &status) | |
Construct a RegexMatcher for a regular expression. | |
virtual | ~RegexMatcher () |
Destructor. | |
virtual UBool | matches (UErrorCode &status) |
Attempts to match the entire input string against the pattern. | |
virtual UBool | matches (int32_t startIndex, UErrorCode &status) |
Attempts to match the input string, beginning at startIndex, against the pattern. | |
virtual UBool | lookingAt (UErrorCode &status) |
Attempts to match the input string, starting from the beginning, against the pattern. | |
virtual UBool | lookingAt (int32_t startIndex, UErrorCode &status) |
Attempts to match the input string, starting from the specified index, against the pattern. | |
virtual UBool | find () |
Find the next pattern match in the input string. | |
virtual UBool | find (int32_t start, UErrorCode &status) |
Resets this RegexMatcher and then attempts to find the next substring of the input string that matches the pattern, starting at the specified index. | |
virtual UnicodeString | group (UErrorCode &status) const |
Returns a string containing the text matched by the previous match. | |
virtual UnicodeString | group (int32_t groupNum, UErrorCode &status) const |
Returns a string containing the text captured by the given group during the previous match operation. | |
virtual int32_t | groupCount () const |
Returns the number of capturing groups in this matcher's pattern. | |
virtual int32_t | start (UErrorCode &status) const |
Returns the index in the input string of the start of the text matched during the previous match operation. | |
virtual int32_t | start (int32_t group, UErrorCode &status) const |
Returns the index in the input string of the start of the text matched by the specified capture group during the previous match operation. | |
virtual int32_t | end (UErrorCode &status) const |
Returns the index in the input string of the first character following the text matched during the previous match operation. | |
virtual int32_t | end (int32_t group, UErrorCode &status) const |
Returns the index in the input string of the character following the text matched by the specified capture group during the previous match operation. | |
virtual RegexMatcher & | reset () |
Resets this matcher. | |
virtual RegexMatcher & | reset (int32_t index, UErrorCode &status) |
Resets this matcher, and set the current input position. | |
virtual RegexMatcher & | reset (const UnicodeString &input) |
Resets this matcher with a new input string. | |
virtual const UnicodeString & | input () const |
Returns the input string being matched. | |
virtual const RegexPattern & | pattern () const |
Returns the pattern that is interpreted by this matcher. | |
virtual UnicodeString | replaceAll (const UnicodeString &replacement, UErrorCode &status) |
Replaces every substring of the input that matches the pattern with the given replacement string. | |
virtual UnicodeString | replaceFirst (const UnicodeString &replacement, UErrorCode &status) |
Replaces the first substring of the input that matches the pattern with the replacement string. | |
virtual RegexMatcher & | appendReplacement (UnicodeString &dest, const UnicodeString &replacement, UErrorCode &status) |
Implements a replace operation intended to be used as part of an incremental find-and-replace. | |
virtual UnicodeString & | appendTail (UnicodeString &dest) |
As the final step in a find-and-replace operation, append the remainder of the input string, starting at the position following the last appendReplacement(), to the destination string. | |
virtual int32_t | split (const UnicodeString &input, UnicodeString dest[], int32_t destCapacity, UErrorCode &status) |
Split a string into fields. | |
void | setTrace (UBool state) |
setTrace Debug function, enable/disable tracing of the matching engine. | |
virtual UClassID | getDynamicClassID () const |
ICU "poor man's RTTI", returns a UClassID for the actual class. | |
Static Public Member Functions | |
static UClassID | getStaticClassID () |
ICU "poor man's RTTI", returns a UClassID for this class. | |
Friends | |
class | RegexPattern |
class | RegexCImpl |
It includes methods for testing for matches, and for find and replace operations.
Class RegexMatcher is not intended to be subclassed.
Definition at line 451 of file regex.h.
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Construct a RegexMatcher for a regular expression. This is a convenience method that avoids the need to explicitly create a RegexPattern object. Note that if several RegexMatchers need to be created for the same expression, it will be more efficient to separately create and cache a RegexPattern object, and use its matcher() method to create the RegexMatcher objects.
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Construct a RegexMatcher for a regular expression. This is a convenience method that avoids the need to explicitly create a RegexPattern object. Note that if several RegexMatchers need to be created for the same expression, it will be more efficient to separately create and cache a RegexPattern object, and use its matcher() method to create the RegexMatcher objects. The matcher will retain a reference to the supplied input string, and all regexp pattern matching operations happen directly on the original string. It is critical that the string not be altered or deleted before use by the regular expression operations is complete.
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Destructor.
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Implements a replace operation intended to be used as part of an incremental find-and-replace. The input string, starting from the end of the previous replacement and ending at the start of the current match, is appended to the destination string. Then the replacement string is appended to the output string, including handling any substitutions of captured text. For simple, prepackaged, non-incremental find-and-replace operations, see replaceFirst() or replaceAll().
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As the final step in a find-and-replace operation, append the remainder of the input string, starting at the position following the last appendReplacement(), to the destination string.
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Returns the index in the input string of the character following the text matched by the specified capture group during the previous match operation.
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Returns the index in the input string of the first character following the text matched during the previous match operation.
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Resets this RegexMatcher and then attempts to find the next substring of the input string that matches the pattern, starting at the specified index.
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Find the next pattern match in the input string.
The find begins searching the input at the location following the end of the previous match, or at the start of the string if there is no previous match. If a match is found, Note that if the input string is changed by the application, use find(startPos, status) instead of find(), because the saved starting position may not be valid with the altered input string.
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ICU "poor man's RTTI", returns a UClassID for the actual class.
Implements UObject. |
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ICU "poor man's RTTI", returns a UClassID for this class.
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Returns a string containing the text captured by the given group during the previous match operation. Group(0) is the entire match.
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Returns a string containing the text matched by the previous match. If the pattern can match an empty string, an empty string may be returned.
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Returns the number of capturing groups in this matcher's pattern.
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Returns the input string being matched. The returned string is not a copy, but the live input string. It should not be altered or deleted.
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Attempts to match the input string, starting from the specified index, against the pattern. The match may be of any length, and is not required to extend to the end of the input string. Contrast with match().
If the match succeeds then more information can be obtained via the
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Attempts to match the input string, starting from the beginning, against the pattern. Like the matches() method, this function always starts at the beginning of the input string; unlike that function, it does not require that the entire input string be matched.
If the match succeeds then more information can be obtained via the
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Attempts to match the input string, beginning at startIndex, against the pattern. The match must extend to the end of the input string.
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Attempts to match the entire input string against the pattern.
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Returns the pattern that is interpreted by this matcher.
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Replaces every substring of the input that matches the pattern with the given replacement string. This is a convenience function that provides a complete find-and-replace-all operation. This method first resets this matcher. It then scans the input string looking for matches of the pattern. Input that is not part of any match is left unchanged; each match is replaced in the result by the replacement string. The replacement string may contain references to capture groups.
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Replaces the first substring of the input that matches the pattern with the replacement string. This is a convenience function that provides a complete find-and-replace operation. This function first resets this RegexMatcher. It then scans the input string looking for a match of the pattern. Input that is not part of the match is appended directly to the result string; the match is replaced in the result by the replacement string. The replacement string may contain references to captured groups. The state of the matcher (the position at which a subsequent find() would begin) after completing a replaceFirst() is not specified. The RegexMatcher should be reset before doing additional find() operations.
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Resets this matcher with a new input string. This allows instances of RegexMatcher to be reused, which is more efficient than creating a new RegexMatcher for each input string to be processed.
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Resets this matcher, and set the current input position. The effect is to remove any memory of previous matches, and to cause subsequent find() operations to begin at the specified position in the input string.
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Resets this matcher. The effect is to remove any memory of previous matches, and to cause subsequent find() operations to begin at the beginning of the input string.
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setTrace Debug function, enable/disable tracing of the matching engine. For internal ICU development use only. DO NO USE!!!!
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Split a string into fields. Somewhat like split() from Perl. The pattern matches identify delimiters that separate the input into fields. The input data between the matches becomes the fields themselves.
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Returns the index in the input string of the start of the text matched by the specified capture group during the previous match operation. Return -1 if the capture group exists in the pattern, but was not part of the last match.
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Returns the index in the input string of the start of the text matched during the previous match operation.
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