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Diffstat (limited to 'Doc/ref')
-rw-r--r-- | Doc/ref/ref5.tex | 48 |
1 files changed, 25 insertions, 23 deletions
diff --git a/Doc/ref/ref5.tex b/Doc/ref/ref5.tex index 8eb70c0..23dd41c 100644 --- a/Doc/ref/ref5.tex +++ b/Doc/ref/ref5.tex @@ -1,4 +1,4 @@ -\chapter{Expressions} +\chapter{Expressions\label{expressions}} \index{expression} This chapter explains the meaning of the elements of expressions in @@ -16,7 +16,7 @@ and no semantics are given, the semantics of this form of \code{name} are the same as for \code{othername}. \index{syntax} -\section{Arithmetic conversions} +\section{Arithmetic conversions\label{conversions}} \indexii{arithmetic}{conversion} When a description of an arithmetic operator below uses the phrase @@ -39,7 +39,9 @@ following coercions are applied: Some additional rules apply for certain operators (e.g., a string left argument to the `\%' operator). Extensions can define their own coercions. -\section{Atoms} + + +\section{Atoms\label{atoms}} \index{atom} Atoms are the most basic elements of expressions. The simplest atoms @@ -52,7 +54,7 @@ atom: identifier | literal | enclosure enclosure: parenth_form|list_display|dict_display|string_conversion \end{verbatim} -\subsection{Identifiers (Names)} +\subsection{Identifiers (Names)\label{atom-identifiers}} \index{name} \index{identifier} @@ -92,7 +94,7 @@ transformed name is extremely long (longer than 255 characters), implementation defined truncation may happen. If the class name consists only of underscores, no transformation is done. -\subsection{Literals} +\subsection{Literals\label{atom-literals}} \index{literal} Python supports string literals and various numeric literals: @@ -115,7 +117,7 @@ the same object or a different object with the same value. \indexiii{immutable}{data}{type} \indexii{immutable}{objects} -\subsection{Parenthesized forms} +\subsection{Parenthesized forms\label{parenthesized}} \index{parenthesized form} A parenthesized form is an optional expression list enclosed in @@ -143,7 +145,7 @@ pass uncaught. \index{comma} \indexii{tuple}{display} -\subsection{List displays} +\subsection{List displays\label{lists}} \indexii{list}{display} A list display is a possibly empty series of expressions enclosed in @@ -160,7 +162,7 @@ list object in that order. \obindex{list} \indexii{empty}{list} -\subsection{Dictionary displays} \label{dict} +\subsection{Dictionary displays\label{dict}} \indexii{dictionary}{display} A dictionary display is a possibly empty series of key/datum pairs @@ -189,7 +191,7 @@ are not detected; the last datum (textually rightmost in the display) stored for a given key value prevails. \indexii{immutable}{objects} -\subsection{String conversions} +\subsection{String conversions\label{string-conversions}} \indexii{string}{conversion} \indexii{reverse}{quotes} \indexii{backward}{quotes} @@ -228,7 +230,7 @@ similar but more user-friendly conversion. \bifuncindex{repr} \bifuncindex{str} -\section{Primaries} \label{primaries} +\section{Primaries\label{primaries}} \index{primary} Primaries represent the most tightly bound operations of the language. @@ -238,7 +240,7 @@ Their syntax is: primary: atom | attributeref | subscription | slicing | call \end{verbatim} -\subsection{Attribute references} +\subsection{Attribute references\label{attribute-references}} \indexii{attribute}{reference} An attribute reference is a primary followed by a period and a name: @@ -258,7 +260,7 @@ yield different objects. \obindex{module} \obindex{list} -\subsection{Subscriptions} +\subsection{Subscriptions\label{subscriptions}} \index{subscription} A subscription selects an item of a sequence (string, tuple or list) @@ -295,7 +297,7 @@ type but a string of exactly one character. \index{character} \indexii{string}{item} -\subsection{Slicings} +\subsection{Slicings\label{slicings}} \index{slicing} \index{slice} @@ -358,7 +360,7 @@ proper slice is a slice object (see section \ref{types}) whose the expressions given as lower bound, upper bound and stride, respectively, substituting \code{None} for missing expressions. -\subsection{Calls} \label{calls} +\subsection{Calls\label{calls}} \index{call} A call calls a callable object (e.g., a function) with a possibly empty @@ -478,7 +480,7 @@ method; the effect is then the same as if that method was called. \end{description} -\section{The power operator} +\section{The power operator\label{power}} The power operator binds more tightly than unary operators on its left; it binds less tightly than unary operators on its right. The @@ -502,7 +504,7 @@ power, or a negative floating point number to a broken power), a \exception{TypeError} exception is raised. -\section{Unary arithmetic operations} +\section{Unary arithmetic operations\label{unary}} \indexiii{unary}{arithmetic}{operation} \indexiii{unary}{bit-wise}{operation} @@ -531,7 +533,7 @@ In all three cases, if the argument does not have the proper type, a \exception{TypeError} exception is raised. \exindex{TypeError} -\section{Binary arithmetic operations} +\section{Binary arithmetic operations\label{binary}} \indexiii{binary}{arithmetic}{operation} The binary arithmetic operations have the conventional priority @@ -594,7 +596,7 @@ arguments. The numeric arguments are first converted to a common type. \index{subtraction} -\section{Shifting operations} +\section{Shifting operations\label{shifting}} \indexii{shifting}{operation} The shifting operations have lower priority than the arithmetic @@ -618,7 +620,7 @@ value. Negative shift counts raise a \exception{ValueError} exception. \exindex{ValueError} -\section{Binary bit-wise operations} +\section{Binary bit-wise operations\label{bitwise}} \indexiii{binary}{bit-wise}{operation} Each of the three bitwise operations has a different priority level: @@ -646,7 +648,7 @@ converted to a common type. \indexii{bit-wise}{or} \indexii{inclusive}{or} -\section{Comparisons} +\section{Comparisons\label{comparisons}} \index{comparison} Contrary to \C, all comparison operations in Python have the same @@ -749,7 +751,7 @@ truth value. \opindex{is not} \indexii{identity}{test} -\section{Boolean operations} \label{Booleans} +\section{Boolean operations\label{Booleans}} \indexii{Boolean}{operation} Boolean operations have the lowest priority of all Python operations: @@ -821,7 +823,7 @@ def make_incrementor(increment): return lambda x, n=increment: x+n \end{verbatim} -\section{Expression lists and expression lists} +\section{Expression lists\label{exprlists}} \indexii{expression}{list} \begin{verbatim} @@ -841,7 +843,7 @@ tuple, but rather yields the value of that expression (expression). \code{()}.) \indexii{trailing}{comma} -\section{Summary} +\section{Summary\label{summary}} The following table summarizes the operator precedences in Python, from lowest precedence (least binding) to highest precedence (most |