关于内联的问题 [英] question on inlining
问题描述
没有内联关键字的函数永远不会内联吗？如果
不是真的，它是否内联？
ben
< blockquote>
" ben" <是****** @ hotmail.com> skrev i en meddelelse
news：42 ********************** @ news.optusnet.com.au ...
没有内联关键字的函数永远不会被内联？如果
不是真的，它是否内联？
根据C ++标准，内联是由酌情决定的
编译器。因此，它可以内联未标记为内联的功能。并且
它可能不会内联标记为内联的函数。各种编译器允许您以这种或那种方式覆盖，例如：使用编译器开关或
使用特殊关键字，如__forceinline。
内联用户观点的目的是避免错误
多个定义。
/ Peter
inline关键字是一个提示，就像寄存器一样。编译器是免费的
完全忽略它。因此，如果没有内联关键字（或在类声明之外定义
）的函数可能会被内联，如果它满足某些未指定的内部启发式。编译器如何优化代码
依赖于实现。
ben写道：
没有内联关键字的函数永远不会被内联，这是真的吗？如果
不是真的，它是否内联？
编译器可以自由地内联它想要的任何函数。提供关键字内联
因为编译器一般都不够智能，用户可以帮助编译器这个
（但编译器仍然可以忽略建议）。
-
Ioannis Vranos
http://www23.brinkster.com/noicys
is it true that a function without an inline keyword never get inlined? If
not true when is it inlined or not?
ben
"ben" <be******@hotmail.com> skrev i en meddelelse
news:42**********************@news.optusnet.com.au ...is it true that a function without an inline keyword never get inlined? If
not true when is it inlined or not?
ben
According to the C++ standard, inlining is at the discretion of the
compiler. It might thus inline a function that is not marked as "inline" and
it might not inline a function marked as "inline". Various compilers allow
you to override that one way or another, e.g. by using compilerswitches or
by using special keywords such as __forceinline.
The purpose of inline for the user point of view is to avoid errors with
multiple definitions.
/Peter
The inline keyword is a hint, just like register. The compiler is free
to ignore it entirely. As such, functions without an inline keyword (or
defined outside of a class declaration) may be inlined if it meets some
unspecified internal heuristics. How a compiler optimizes code is
implementation-dependent.
ben wrote:
is it true that a function without an inline keyword never get inlined? If
not true when is it inlined or not?
A compiler is free to inline whatever function it wants. Keyword inline is provided
because compilers aren''t smart enough in general, and a user can aid the compiler to this
(but still the compiler is free to ignore the suggestion).
--
Ioannis Vranos
http://www23.brinkster.com/noicys
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