diff options
| -rw-r--r-- | txr.1 | 27 |
1 files changed, 20 insertions, 7 deletions
@@ -1583,7 +1583,7 @@ which are not allowed in a .metn sident : .cblk - ! $ % & * + - < = > ? \e _ ~ + ! $ % & * + - < = > ? \e ~ .cble The rule still holds that a name cannot look like a number so @@ -10552,18 +10552,31 @@ all the same characters, as well as the .metn bident . Thus a .meta lident -may consist of these characters, in addition to letters and numbers: +may consist of these characters, in addition to letters, numbers and +underscores: .cblk - ! $ % & * + - < = > ? \e _ ~ / + ! $ % & * + - < = > ? \e ~ / .cble -and of course, may not look like a number. A lone +and of course, may not look like a number. + +The character allowed in a +.meta lident +but not in a +.meta bident +is .code / -is a symbol in \*(TL. The token +(forward slash). + +A lone +.code / +is a valid +.meta lident +and consequently a symbol token in \*(TL. The token .code /abc/ -is also a symbol, and not a regular expression, like it is in the braced -variable syntax. Within \*(TL, regular expressions are written with +is also a symbol, and, unlike in a braced expression, is not a regular +expression. In \*(TL expressions, regular expressions are written with a leading .codn # . |