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C++1x support?
From: |
Daniel Colascione |
Subject: |
C++1x support? |
Date: |
Fri, 04 Dec 2009 01:13:19 -0500 |
User-agent: |
Thunderbird 2.0.0.23 (Macintosh/20090812) |
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With upcoming versions of gcc and the-compiler-which-shan't-be-named
supporting huge swaths of the next C++ standard, it's probably
worthwhile to start talking about how to support it.
I've made a short of the things that do and don't work with the current
cc-mode.
Is anyone working on these?
WHAT WORKS:
rvalue references (which are spelled with double ampersands) are fine.
user-defined literals and most new string prefixes work fine.
range-based for loops are fontified correctly as far as I can tell.
Amazingly, lambas seem to work (though the new-style return type
specification isn't fontified properly: that is, in
[](int x,
int y,
int z) -> obj
{
int z = x + y; return z + x;
}
obj should be fontified as a type.)
WHAT DOESN'T WORK:
New Keywords:
There are new keywords constexpr, nullptr, static_assert, and decltype,
but adding those should be trivial.
New template parsing rules:
'>>' now being parsed as a template argument list ender instead of a
right shift
Type inference:
auto x = somefunction(); // compiler infers type of x
cc-mode highlights x as a type.
Variadic templates:
template<typename... Args> void printf(const char* fmt, Args... args);
cc-mode copes with the function arguments, but it just gives up on the
template arguments. Also, forward-sexp doesn't move over 'Args...': it
stops before the dots.
New strings:
I have a feeling this one might be painful. C++0x has raw strings:
(from Wikipedia)
u8R"XXX[I'm a "raw UTF-8" string.]XXX"
uR"address@hidden is a "raw UTF-16" string.]*@"
UR"[This is a "raw UTF-32" string.]"
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