Syntax Summary
Table 11-1 summarizes the syntax of regular expressions available in all versions of Tcl:
| . | Matches any character. |
| * | Matches zero or more instances of the previous pattern item. |
| + | Matches one or more instances of the previous pattern item. |
| ? | Matches zero or one instances of the previous pattern item. |
| ( ) | Groups a subpattern. The repetition and alternation operators apply to the preceding subpattern. |
| | | Alternation. |
| [ ] | Delimit a set of characters. Ranges are specified as [x-y]. If the first character in the set is ^, then there is a match if the remaining characters in the set are not present. |
| ^ | Anchor the pattern to the beginning of the string. Only when first. |
| $ | Anchor the pattern to the end of the string. ... |
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