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Diffstat (limited to 'doc/manual/14_Appendix.md')
| -rw-r--r-- | doc/manual/14_Appendix.md | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/doc/manual/14_Appendix.md b/doc/manual/14_Appendix.md index 71dacb1f..d19257d1 100644 --- a/doc/manual/14_Appendix.md +++ b/doc/manual/14_Appendix.md @@ -191,7 +191,7 @@ Ctrl+Shift+U, xxxx, Enter|None|Input Unicode character U-xxxx. ## Lua Patterns The following is taken from the -[Lua 5.1 Reference Manual](http://www.lua.org/manual/5.1/manual.html#5.4.1). +[Lua 5.2 Reference Manual](http://www.lua.org/manual/5.2/manual.html#6.4.1). _Character Class:_ @@ -204,13 +204,13 @@ combinations are allowed in describing a character class: * **`%a`:** represents all letters. * **`%c`:** represents all control characters. * **`%d`:** represents all digits. +* **`%g`:** represents all printable characters except space. * **`%l`:** represents all lowercase letters. * **`%p`:** represents all punctuation characters. * **`%s`:** represents all space characters. * **`%u`:** represents all uppercase letters. * **`%w`:** represents all alphanumeric characters. * **`%x`:** represents all hexadecimal digits. -* **`%z`:** represents the character with representation 0. * **`%`_`x`_:** (where _x_ is any non-alphanumeric character) represents the character _x_. This is the standard way to escape the magic characters. Any punctuation character (even the non magic) can be preceded by a '`%`' when @@ -259,6 +259,11 @@ A _pattern item_ can be counting +_1_ for an _x_ and -_1_ for a _y_, the ending _y_ is the first _y_ where the count reaches 0. For instance, the item `%b()` matches expressions with balanced parentheses. +* `%f[set]`, a _frontier pattern_; such item matches an empty string at any + position such that the next character belongs to _set_ and the previous + character does not belong to _set_. The set _set_ is interpreted as previously + described. The beginning and the end of the subject are handled as if they + were the character `'\0'`. _Pattern:_ @@ -280,5 +285,3 @@ is captured with number 2, and the part matching "`%s*`" has number 3. As a special case, the empty capture `()` captures the current string position (a number). For instance, if we apply the pattern `"()aa()"` on the string `"flaaap"`, there will be two captures: 3 and 5. - -A pattern cannot contain embedded zeros. Use `%z` instead. |