diff options
Diffstat (limited to 'doc/Tcl.n')
| -rw-r--r-- | doc/Tcl.n | 41 |
1 files changed, 23 insertions, 18 deletions
@@ -28,7 +28,7 @@ First, the Tcl interpreter breaks the command into \fIwords\fR and performs substitutions as described below. These substitutions are performed in the same way for all commands. -The first word is used to locate a command procedure to +Secondly, the first word is used to locate a command procedure to carry out the command, then all of the words of the command are passed to the command procedure. The command procedure is free to interpret each of its words @@ -108,8 +108,8 @@ Variable substitution may take any of the following forms: \fIName\fR is the name of a scalar variable; the name is a sequence of one or more characters that are a letter, digit, underscore, or namespace separators (two or more colons). -Letters and digits are \fIonly\fR the standard ASCII ones (\fB0\fR\-\fB9\fR, -\fBA\fR\-\fBZ\fR and \fBa\fR\-\fBz\fR). +Letters and digits are \fIonly\fR the standard ASCII ones (\fB0\fR\(en\fB9\fR, +\fBA\fR\(en\fBZ\fR and \fBa\fR\(en\fBz\fR). .TP 15 \fB$\fIname\fB(\fIindex\fB)\fR . @@ -117,8 +117,8 @@ Letters and digits are \fIonly\fR the standard ASCII ones (\fB0\fR\-\fB9\fR, the name of an element within that array. \fIName\fR must contain only letters, digits, underscores, and namespace separators, and may be an empty string. -Letters and digits are \fIonly\fR the standard ASCII ones (\fB0\fR\-\fB9\fR, -\fBA\fR\-\fBZ\fR and \fBa\fR\-\fBz\fR). +Letters and digits are \fIonly\fR the standard ASCII ones (\fB0\fR\(en\fB9\fR, +\fBA\fR\(en\fBZ\fR and \fBa\fR\(en\fBz\fR). Command substitutions, variable substitutions, and backslash substitutions are performed on the characters of \fIindex\fR. .TP 15 @@ -158,25 +158,25 @@ handled specially, along with the value that replaces each sequence. .RS .TP 7 \e\fBa\fR -Audible alert (bell) (0x7). +Audible alert (bell) (Unicode U+000007). .TP 7 \e\fBb\fR -Backspace (0x8). +Backspace (Unicode U+000008). .TP 7 \e\fBf\fR -Form feed (0xc). +Form feed (Unicode U+00000C). .TP 7 \e\fBn\fR -Newline (0xa). +Newline (Unicode U+00000A). .TP 7 \e\fBr\fR -Carriage-return (0xd). +Carriage-return (Unicode U+00000D). .TP 7 \e\fBt\fR -Tab (0x9). +Tab (Unicode U+000009). .TP 7 \e\fBv\fR -Vertical tab (0xb). +Vertical tab (Unicode U+00000B). .TP 7 \e\fB<newline>\fIwhiteSpace\fR . @@ -194,8 +194,9 @@ Backslash \e\fIooo\fR . The digits \fIooo\fR (one, two, or three of them) give a eight-bit octal -value for the Unicode character that will be inserted, in the range \fI000\fR -- \fI377\fR. The parser will stop just before this range overflows, or when +value for the Unicode character that will be inserted, in the range +\fI000\fR\(en\fI377\fR (i.e., the range U+000000\(enU+0000FF). +The parser will stop just before this range overflows, or when the maximum of three digits is reached. The upper bits of the Unicode character will be 0. .TP 7 @@ -203,23 +204,27 @@ character will be 0. . The hexadecimal digits \fIhh\fR (one or two of them) give an eight-bit hexadecimal value for the Unicode character that will be inserted. The upper -bits of the Unicode character will be 0. +bits of the Unicode character will be 0 (i.e., the character will be in the +range U+000000\(enU+0000FF). .TP 7 \e\fBu\fIhhhh\fR . The hexadecimal digits \fIhhhh\fR (one, two, three, or four of them) give a sixteen-bit hexadecimal value for the Unicode character that will be -inserted. The upper bits of the Unicode character will be 0. +inserted. The upper bits of the Unicode character will be 0 (i.e., the +character will be in the range U+000000\(enU+00FFFF). .TP 7 \e\fBU\fIhhhhhhhh\fR . The hexadecimal digits \fIhhhhhhhh\fR (one up to eight of them) give a twenty-one-bit hexadecimal value for the Unicode character that will be -inserted, in the range U+0000..U+10FFFF. The parser will stop just +inserted, in the range U+000000\(enU+10FFFF. The parser will stop just before this range overflows, or when the maximum of eight digits is reached. The upper bits of the Unicode character will be 0. +.RS .PP -The range U+010000..U+10FFFD is reserved for the future. +The range U+010000\(enU+10FFFD is reserved for the future. +.RE .PP Backslash substitution is not performed on words enclosed in braces, except for backslash-newline as described above. |