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authordkf <donal.k.fellows@manchester.ac.uk>2013-12-15 17:49:53 (GMT)
committerdkf <donal.k.fellows@manchester.ac.uk>2013-12-15 17:49:53 (GMT)
commit12a14105a15ca9bae71b2020fdc9d1c1b1b95dff (patch)
tree277c5486829521257e14440f75be75066df4f55a /doc
parent2b1bafdd8a2fca08d2d7b57f68cc803f83dba72e (diff)
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Improve descriptions of character escapes and ranges in Tcl.n.
Improve output format handlers to cope with added escape for en-dashes.
Diffstat (limited to 'doc')
-rw-r--r--doc/Tcl.n39
1 files changed, 22 insertions, 17 deletions
diff --git a/doc/Tcl.n b/doc/Tcl.n
index 8b17f93..c7fa9f6 100644
--- a/doc/Tcl.n
+++ b/doc/Tcl.n
@@ -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.