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https://git.lyx.org/repos/lyx.git
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Update Development.lyx
This commit is contained in:
Yuriy Skalko
parent
61a80ab6d3
commit
14bcdb2bc7
@ -121,20 +121,18 @@ by the \SpecialChar LyX
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status collapsed
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\begin_layout Plain Layout
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\noindent
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If you have comments or error corrections, please send them to the \SpecialChar LyX
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Documentatio
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n mailing list,
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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<lyx-docs@lists.lyx.org>
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\end_layout
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If you have comments on or error corrections to this documentation, please
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send them to the \SpecialChar LyX
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Documentation mailing list:
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\begin_inset CommandInset href
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LatexCommand href
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target "lyx-docs@lists.lyx.org"
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type "mailto:"
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literal "false"
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\end_inset
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.
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\end_layout
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\end_inset
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@ -5338,13 +5336,13 @@ These guidelines should save us a lot of work while cleaning up the code
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\end_layout
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\begin_layout Itemize
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the most important rule first: KISS (Keep It Simple Stupid), always use
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The most important rule first: KISS (Keep It Simple Stupid), always use
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a simple implementation in favor of a more complicated one.
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This eases maintenance a lot.
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\end_layout
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\begin_layout Itemize
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write good C++ code: Readable, well commented and taking advantage of the
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Write good C++ code: readable, well commented, and taking advantage of the
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OO model.
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Follow the formatting guidelines.
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See sec.
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@ -5365,20 +5363,20 @@ noprefix "false"
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\end_layout
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\begin_layout Itemize
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adapt the code to the structures already existing in \SpecialChar LyX
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Adapt the code to the structures already existing in \SpecialChar LyX
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, or in the case that
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you have better ideas, discuss them on the developer's list before writing
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the code.
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\end_layout
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\begin_layout Itemize
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take advantage of the C++ standard library.
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Take advantage of the C++ standard library.
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Especially don't use custom containers when a standard container is usable;
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learn to use the algorithms and functors in the standard library.
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\end_layout
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\begin_layout Itemize
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be aware of exceptions and write exception safe code.
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Be aware of exceptions and write exception safe code.
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See sec.
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\begin_inset space ~
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\end_inset
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@ -5397,7 +5395,7 @@ noprefix "false"
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\end_layout
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\begin_layout Itemize
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document all variables, methods, functions, classes etc.
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Document all variables, methods, functions, classes etc.
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We are using the source documentation program doxygen, a program that handles
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javadoc syntax, to document sources.
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You can download doxygen from:
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@ -5415,7 +5413,7 @@ http://www.stack.nl/~dimitri/doxygen/
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\end_layout
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\begin_layout Itemize
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we have certain code constructs that we try to follow.
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We have certain code constructs that we try to follow.
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See sec.
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\begin_inset space ~
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\end_inset
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@ -5447,11 +5445,19 @@ It is implicitly understood that all patches contributed to The \SpecialChar LyX
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.
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Always discuss your ideas with the developers on the developer's mailing
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list.
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When you create the patch, please use "
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When you create the patch, please use
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\begin_inset Quotes eld
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\end_inset
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\family typewriter
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diff -up
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\family default
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" since we find that a lot easier to read than the other diff formats.
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\begin_inset Quotes erd
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\end_inset
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since we find that a lot easier to read than the other diff formats.
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Also please do not send patches that implements or fixes several different
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things; several patches is a much better option.
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We also require you to provide a commit message entry with every patch,
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@ -5475,20 +5481,47 @@ We have several guidelines on code constructs, some of these exist to make
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the code faster, others to make the code clearer.
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Yet others exist to allow us to take advantage of the strong type checking
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in C++.
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\end_layout
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\begin_layout Itemize
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Declaration of variables should wait as long as possible.
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The rule is: "Don't declare it until you need it." In C++ there are a lot
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of user defined types, and these can very often be expensive to initialize.
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The rule is:
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\begin_inset Quotes eld
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\end_inset
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Don't declare it until you need it.
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\begin_inset Quotes erd
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\end_inset
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In C++ there are a lot of user defined types, and these can very often
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be expensive to initialize.
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This rule connects to the next rule too.
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\end_layout
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\begin_layout Itemize
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Declare the variable as const if you don't need to change it.
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This applies to POD types like int as well as classes.
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Declare the variable as
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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const
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\end_layout
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\end_inset
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if you don't need to change it.
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This applies to POD types like
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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int
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\end_layout
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\end_inset
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as well as classes.
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\end_layout
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@ -5498,7 +5531,17 @@ Make the scope of a variable as small as possible.
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\begin_layout Itemize
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Make good use of namespaces.
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Prefer anonymous namespaces to declaring "static" for file scope.
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Prefer anonymous namespaces to declaring
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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static
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\end_layout
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\end_inset
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for file scope.
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\end_layout
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\begin_layout Itemize
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@ -5522,7 +5565,7 @@ Use:
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\begin_deeper
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\footnotesize},language={C++}"
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -5547,6 +5590,7 @@ Do not use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -5583,6 +5627,7 @@ Use:
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\begin_deeper
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -5609,6 +5654,36 @@ for (Container::iterator it = large.begin(); it != end; ++it) {
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\end_inset
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\end_layout
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\begin_layout Standard
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Or better (C++11):
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\end_layout
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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\begin_layout Plain Layout
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for (auto const & it : large) {
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\end_layout
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\begin_layout Plain Layout
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...;
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\end_layout
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\begin_layout Plain Layout
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}
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\end_layout
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\end_inset
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\end_layout
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\begin_layout Standard
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@ -5617,6 +5692,7 @@ Do not use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -5652,7 +5728,27 @@ Plain Ol' Data type
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\end_inset
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T, return T const instead.
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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T
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\end_layout
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\end_inset
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, return
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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T const
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\end_layout
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\end_inset
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instead.
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This gives better type checking, and will give a compiler warning when
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temporaries are used wrongly.
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\begin_inset Separator latexpar
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@ -5668,12 +5764,13 @@ Use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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\begin_layout Plain Layout
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T const add(..);
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T const add(...);
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\end_layout
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\end_inset
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@ -5687,12 +5784,13 @@ Do not use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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\begin_layout Plain Layout
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T add(..);
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T add(...);
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\end_layout
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\end_inset
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@ -5709,6 +5807,7 @@ Avoid using the default cases in switch statements unless you have too.
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\begin_layout Itemize
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -5911,6 +6010,7 @@ Use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -5935,6 +6035,7 @@ Do not use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -5958,6 +6059,7 @@ Use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -5982,6 +6084,7 @@ Do not use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -5996,16 +6099,42 @@ string a = "Lars", b = "Gullik"; // not used in LyX
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\end_layout
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\begin_layout Standard
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[Note that 'string a = "Lars"' is formally calling a copy constructor on
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a temporary constructed from a string literal and therefore has the potential
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of being more expensive then direct construction by 'string a("Lars")'.
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[Note that
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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string a = "Lars"
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\end_layout
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\end_inset
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is formally calling a copy constructor on a temporary constructed from
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a string literal and therefore has the potential of being more expensive
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then direct construction by
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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string a("Lars")
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\end_layout
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\end_inset
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.
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However the compiler is allowed to elide the copy (even if it had side
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effects), and modern compilers typically do so.
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Given these equal costs, \SpecialChar LyX
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code favours the '=' idiom as it is in line with
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the traditional C-style initialization, _and_ cannot be mistaken as function
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declaration, _and_ reduces the level of nested parantheses in more initializati
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ons.]
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the traditional C-style initialization,
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\emph on
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and
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\emph default
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cannot be mistaken as function declaration,
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\emph on
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and
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\emph default
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reduces the level of nested parentheses in more initializations.]
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\end_layout
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\end_deeper
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@ -6024,6 +6153,7 @@ Use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6048,6 +6178,7 @@ Do not use:
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6074,6 +6205,7 @@ Some time ago we had a huge discussion on this subject and after convincing
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6093,6 +6225,7 @@ and not
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6118,6 +6251,7 @@ Operator names and parentheses
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\begin_deeper
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6137,6 +6271,7 @@ and not
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6167,6 +6302,7 @@ Function names and parentheses
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\begin_deeper
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6186,6 +6322,7 @@ and not
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6211,6 +6348,7 @@ Enumerators
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||||
\begin_deeper
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||||
\begin_layout Standard
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||||
\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6250,6 +6388,7 @@ and not
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|
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\begin_layout Standard
|
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6269,6 +6408,7 @@ and not
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\begin_layout Standard
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||||
\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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status open
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@ -6313,18 +6453,18 @@ Null pointers
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||||
|
||||
\begin_deeper
|
||||
\begin_layout Standard
|
||||
Using a plain 0 is always correct and least effort to type.
|
||||
So:
|
||||
Use nullptr (C++11):
|
||||
\end_layout
|
||||
|
||||
\begin_layout Standard
|
||||
\begin_inset listings
|
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
|
||||
inline false
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
void * p = 0;
|
||||
void * p = nullptr;
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||||
\end_layout
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||||
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||||
\end_inset
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||||
@ -6338,6 +6478,7 @@ and not
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||||
|
||||
\begin_layout Standard
|
||||
\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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||||
status open
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@ -6357,6 +6498,7 @@ and not
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\begin_layout Standard
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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inline false
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||||
status open
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@ -6378,6 +6520,7 @@ and not
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||||
|
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\begin_layout Standard
|
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\begin_inset listings
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lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
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||||
inline false
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||||
status open
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||||
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||||
@ -6393,7 +6536,25 @@ void * p = 42 - 7 * 6; // not used in LyX
|
||||
|
||||
\begin_layout Standard
|
||||
Note: As an exception, imported third party code as well as code interfacing
|
||||
the "native" APIs (src/support/os_*) can use NULL.
|
||||
the
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||||
\begin_inset Quotes eld
|
||||
\end_inset
|
||||
|
||||
native
|
||||
\begin_inset Quotes erd
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||||
\end_inset
|
||||
|
||||
APIs (
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||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
src/support/os_*
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
) can use NULL.
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||||
\end_layout
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|
||||
\end_deeper
|
||||
@ -6420,27 +6581,43 @@ Enums are named like Classes, values are usually in lower-case.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Public API is camel-case ('
|
||||
\family typewriter
|
||||
Public API functions are camel-case (
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
void setAFlagToAValue(bool)
|
||||
\family default
|
||||
')
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
).
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Members variables are underscored ('
|
||||
\family typewriter
|
||||
Member variables are underscored (
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
enable_this_feature_flag_
|
||||
\family default
|
||||
') with a final '
|
||||
\family typewriter
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
) with a final
|
||||
\begin_inset Quotes eld
|
||||
\end_inset
|
||||
|
||||
_
|
||||
\family default
|
||||
'
|
||||
\begin_inset Quotes erd
|
||||
\end_inset
|
||||
|
||||
.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Private/protected functions are also camel-case
|
||||
Private/protected functions are also camel-case.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
@ -6483,20 +6660,66 @@ name "Use-string-wherever"
|
||||
|
||||
\end_inset
|
||||
|
||||
Use string wherever possible.
|
||||
\SpecialChar LyX
|
||||
will someday move to Unicode, and that will be easy if everybody uses
|
||||
string now.
|
||||
Unicode strings should prefer using docstring instead of UTF-8 encoded
|
||||
std::string.
|
||||
Use
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
string
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
wherever possible.
|
||||
Unicode strings should prefer using
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
docstring
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
instead of UTF-8 encoded
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
std::string
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Check out the filename and path tools in filetools.h
|
||||
Check out the filename and path tools in
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
filetools.h
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
Check out the string tools in lstring.h.
|
||||
Check out the string tools in
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
lstring.h
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
@ -6553,6 +6776,7 @@ If you create a new file, the top of the file should look something like
|
||||
|
||||
\begin_layout Standard
|
||||
\begin_inset listings
|
||||
lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
|
||||
inline false
|
||||
status open
|
||||
|
||||
@ -6597,7 +6821,12 @@ author Kaiser Sose
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
* Full author contact details are available in file CREDITS
|
||||
* Full author contact details are available
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
* in file CREDITS.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
@ -6643,13 +6872,34 @@ in the .cpp files you document the implementation.
|
||||
|
||||
\end_deeper
|
||||
\begin_layout Itemize
|
||||
Single line description (///), multiple lines description (/** ...
|
||||
*/) see the doxygen webpage referenced above
|
||||
Single line description (
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
///
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
), multiple lines description (
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
/** ...
|
||||
*/
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
), see the doxygen webpage referenced above.
|
||||
\end_layout
|
||||
|
||||
\end_deeper
|
||||
\begin_layout Section
|
||||
Naming rules for Lyx User Functions (LFUNs)
|
||||
Naming rules for \SpecialChar LyX
|
||||
User Functions (LFUNs)
|
||||
\end_layout
|
||||
|
||||
\begin_layout Standard
|
||||
@ -6658,7 +6908,7 @@ Here is the set of rules to apply when a new command name is introduced:
|
||||
|
||||
\begin_layout Enumerate
|
||||
Use the object.event order.
|
||||
That is, use `word-forward' instead of`forward-word'.
|
||||
That is, use `word-forward' instead of `forward-word'.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Enumerate
|
||||
@ -6716,6 +6966,7 @@ We need to add a function f to the class C's API.
|
||||
\begin_deeper
|
||||
\begin_layout Standard
|
||||
\begin_inset listings
|
||||
lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
|
||||
inline false
|
||||
status open
|
||||
|
||||
@ -6832,9 +7083,67 @@ inline
|
||||
|
||||
\begin_layout Itemize
|
||||
use the same form in corresponding calls to new and delete, i.e.
|
||||
write delete[] obj; if new obj[n]; was used to create the object and write
|
||||
delete obj; if you wrote new obj; Notice strings should be std::string's
|
||||
instead of char *'s.
|
||||
write
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
delete[] obj;
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
if
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
new obj[n];
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
was used to create the object and write
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
delete obj;
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
if you wrote
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
new obj;
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
Notice strings should be
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
std::string
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
's instead of
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
char *
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
's.
|
||||
(this contradicts to
|
||||
\begin_inset CommandInset ref
|
||||
LatexCommand ref
|
||||
@ -6917,7 +7226,27 @@ ensure that global objects are initialized before they are used
|
||||
\end_layout
|
||||
|
||||
\begin_layout Itemize
|
||||
avoid conditions to 'if' and 'while' that span more than a line
|
||||
avoid conditions to
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
if
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
and
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
while
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
that span more than a line
|
||||
\end_layout
|
||||
|
||||
\begin_layout Chapter
|
||||
@ -6986,6 +7315,7 @@ In C++11 there's a "built-in":
|
||||
|
||||
\begin_layout Standard
|
||||
\begin_inset listings
|
||||
lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
|
||||
inline false
|
||||
status open
|
||||
|
||||
@ -7005,12 +7335,18 @@ until then on namespace scope:
|
||||
|
||||
\begin_layout Standard
|
||||
\begin_inset listings
|
||||
lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
|
||||
inline false
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
#include <boost/static_assert.hpp> BOOST_STATIC_ASSERT(sizeof(int) == 4)
|
||||
#include <boost/static_assert.hpp>
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
BOOST_STATIC_ASSERT(sizeof(int) == 4)
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
@ -7024,22 +7360,43 @@ or without boost:
|
||||
|
||||
\begin_layout Standard
|
||||
\begin_inset listings
|
||||
lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
|
||||
inline false
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
template<bool Condition> struct static_assert_helper;
|
||||
template<bool Condition>
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
template <> struct static_assert_helper<true> {};
|
||||
struct static_assert_helper;
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
enum { dummy = sizeof(static_assert_helper<sizeof(int) == 4>)};
|
||||
template <>
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
struct static_assert_helper<true> {};
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
enum {
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
dummy = sizeof(static_assert_helper<sizeof(int) == 4>)
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
};
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
@ -7053,6 +7410,7 @@ or somewhat brutish without templates, in any function:
|
||||
|
||||
\begin_layout Standard
|
||||
\begin_inset listings
|
||||
lstparams "basicstyle={\ttfamily},showstringspaces=false,tabsize=4"
|
||||
inline false
|
||||
status open
|
||||
|
||||
@ -7063,7 +7421,7 @@ const int d = sizeof(int) - 4;
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
switch(0) {
|
||||
switch (0) {
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
@ -7078,7 +7436,7 @@ case !(d*d):
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
break;
|
||||
break;
|
||||
\end_layout
|
||||
|
||||
\begin_layout Plain Layout
|
||||
@ -7092,7 +7450,16 @@ break;
|
||||
\end_layout
|
||||
|
||||
\begin_layout Standard
|
||||
Any of them in a .cpp file will break compilation as soon as sizeof(int)
|
||||
Any of them in a .cpp file will break compilation as soon as
|
||||
\begin_inset Flex Code
|
||||
status collapsed
|
||||
|
||||
\begin_layout Plain Layout
|
||||
sizeof(int)
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
is not equal 4.
|
||||
Personally I prefer something like the third version (or the first, if
|
||||
using C++11 is allowed).
|
||||
@ -7233,10 +7600,9 @@ literal "true"
|
||||
|
||||
\end_inset
|
||||
|
||||
S.
|
||||
Meyers.
|
||||
Effective C++, 50 Specific Ways to Improve Your Programs and Design.
|
||||
Addison-Wesley, 1992
|
||||
Meyers, Scott.
|
||||
Effective C++: 50 Specific Ways to Improve Your Programs and Design.
|
||||
Addison-Wesley, 1992.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Bibliography
|
||||
@ -7249,7 +7615,7 @@ literal "true"
|
||||
|
||||
Sutter, Herb.
|
||||
Exceptional C++: 47 engineering puzzles, programming problems, and solutions.
|
||||
ISBN 0-201-61562-2
|
||||
ISBN 0-201-61562-2.
|
||||
\end_layout
|
||||
|
||||
\begin_layout Bibliography
|
||||
@ -7260,7 +7626,8 @@ literal "true"
|
||||
|
||||
\end_inset
|
||||
|
||||
Scott Meyers, C/C++ User's Journal (Vol.18,No.2)
|
||||
Meyers, Scott.
|
||||
C/C++ User's Journal (Vol.18, No.2).
|
||||
\end_layout
|
||||
|
||||
\end_body
|
||||
|
||||
Loading…
Reference in New Issue
Block a user