diff options
Diffstat (limited to 'Doc/ref')
| -rw-r--r-- | Doc/ref/ref2.tex | 33 |
1 files changed, 17 insertions, 16 deletions
diff --git a/Doc/ref/ref2.tex b/Doc/ref/ref2.tex index 54706f3..3319949 100644 --- a/Doc/ref/ref2.tex +++ b/Doc/ref/ref2.tex @@ -387,14 +387,14 @@ are generally referred to as \emph{triple-quoted strings}). The backslash (\code{\e}) character is used to escape characters that otherwise have a special meaning, such as newline, backslash itself, or the quote character. String literals may optionally be prefixed -with a letter `r' or `R'; such strings are called \dfn{raw -strings}\index{raw string} and use different rules for interpreting -backslash escape sequences. A prefix of 'u' or 'U' makes the string -a Unicode string. Unicode strings use the Unicode character set as -defined by the Unicode Consortium and ISO~10646. Some additional +with a letter \character{r} or \character{R}; such strings are called +\dfn{raw strings}\index{raw string} and use different rules for interpreting +backslash escape sequences. A prefix of \character{u} or \character{U} +makes the string a Unicode string. Unicode strings use the Unicode character +set as defined by the Unicode Consortium and ISO~10646. Some additional escape sequences, described below, are available in Unicode strings. -The two prefix characters may be combined; in this case, `u' must -appear before `r'. +The two prefix characters may be combined; in this case, \character{u} must +appear before \character{r}. In triple-quoted strings, unescaped newlines and quotes are allowed (and are retained), except @@ -402,8 +402,8 @@ that three unescaped quotes in a row terminate the string. (A ``quote'' is the character used to open the string, i.e. either \code{'} or \code{"}.) -Unless an `r' or `R' prefix is present, escape sequences in strings -are interpreted according to rules similar +Unless an \character{r} or \character{R} prefix is present, escape +sequences in strings are interpreted according to rules similar to those used by Standard C. The recognized escape sequences are: \index{physical line} \index{escape sequence} @@ -443,12 +443,12 @@ important to note that the escape sequences marked as ``(Unicode only)'' in the table above fall into the category of unrecognized escapes for non-Unicode string literals. -When an `r' or `R' prefix is present, a character following a -backslash is included in the string without change, and \emph{all +When an \character{r} or \character{R} prefix is present, a character +following a backslash is included in the string without change, and \emph{all backslashes are left in the string}. For example, the string literal \code{r"\e n"} consists of two characters: a backslash and a lowercase -`n'. String quotes can be escaped with a backslash, but the backslash -remains in the string; for example, \code{r"\e""} is a valid string +\character{n}. String quotes can be escaped with a backslash, but the +backslash remains in the string; for example, \code{r"\e""} is a valid string literal consisting of two characters: a backslash and a double quote; \code{r"\e"} is not a valid string literal (even a raw string cannot end in an odd number of backslashes). Specifically, \emph{a raw @@ -537,9 +537,10 @@ lexical definitions: {\token{digit} | "a"..."f" | "A"..."F"} \end{productionlist} -Although both lower case `l' and upper case `L' are allowed as suffix -for long integers, it is strongly recommended to always use `L', since -the letter `l' looks too much like the digit `1'. +Although both lower case \character{l} and upper case \character{L} are +allowed as suffix for long integers, it is strongly recommended to always +use \character{L}, since the letter \character{l} looks too much like the +digit \character{1}. Plain integer decimal literals must be at most 2147483647 (i.e., the largest positive integer, using 32-bit arithmetic). Plain octal and |