Vim 缩进 c++ 模板？
有谁知道或知道 vim 插件/宏/函数可以很好地缩进 c++ 模板吗？
当我在 vim .hpp/.h 文件中突出显示模板定义并用“=”缩进时，我得到这样的结果：
> template <
> class TFilter,
> class TParser,
> class TConsumer,
> class TDataProcessor,
> class TDataFeed,
> class TSymbolMap
> >
> struct DataFeedTraits
> {
> typedef TFilter Filter;
> typedef TParser<TSymbolMap> Parser;
> typedef TConsumer<Parser> Consumer;
> typedef TDataProcessor<Filter,Consumer> DataProcessor;
> typedef TDataFeed<Filter,DataProcessor,Parser,Ccnsumer> DataFeed;
> };
我认为 cindent 将结构/类声明与右括号“>”对齐。 我想最终得到这样的结果，或者类似的结果，只要它被格式化，精确的格式并不重要：
template <
class TFilter,
class TParser,
class TConsumer,
class TDataProcessor,
class TDataFeed,
class TSymbolMap
>
struct DataFeedTraits
{
typedef TFilter Filter;
typedef TParser<TSymbolMap> Parser;
typedef TConsumer<Parser> Consumer;
typedef TDataProcessor<Filter,Consumer> DataProcessor;
typedef TDataFeed<Filter,DataProcessor,Parser,Ccnsumer> DataFeed;
};
Does anyone have or know about vim plugin/macro/function that indents nicely c++ templates?
When I highlight template definition in vim .hpp/.h file and indent it with '=' I get something like this:
> template <
> class TFilter,
> class TParser,
> class TConsumer,
> class TDataProcessor,
> class TDataFeed,
> class TSymbolMap
> >
> struct DataFeedTraits
> {
> typedef TFilter Filter;
> typedef TParser<TSymbolMap> Parser;
> typedef TConsumer<Parser> Consumer;
> typedef TDataProcessor<Filter,Consumer> DataProcessor;
> typedef TDataFeed<Filter,DataProcessor,Parser,Ccnsumer> DataFeed;
> };
I think the cindent aligns the struct/class declaration with the closing bracket '>'.
I would like to end up with something like this, or similar, exact formatting does not matter, as far as it is formatted:
template <
class TFilter,
class TParser,
class TConsumer,
class TDataProcessor,
class TDataFeed,
class TSymbolMap
>
struct DataFeedTraits
{
typedef TFilter Filter;
typedef TParser<TSymbolMap> Parser;
typedef TConsumer<Parser> Consumer;
typedef TDataProcessor<Filter,Consumer> DataProcessor;
typedef TDataFeed<Filter,DataProcessor,Parser,Ccnsumer> DataFeed;
};
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我的解决方案：
" Don't indent namespace and template function! CppNoNamespaceAndTemplateIndent() let l:cline_num = line('.') let l:cline = getline(l:cline_num) let l:pline_num = prevnonblank(l:cline_num - 1) let l:pline = getline(l:pline_num) while l:pline =~# '\(^\s*{\s*\|^\s*//\|^\s*/\*\|\*/\s*$\)' let l:pline_num = prevnonblank(l:pline_num - 1) let l:pline = getline(l:pline_num) endwhile let l:retv = cindent('.') let l:pindent = indent(l:pline_num) if l:pline =~# '^\s*template\s*\s* let l:retv = l:pindent elseif l:pline =~# '\s*typename\s*.*,\s* let l:retv = l:pindent elseif l:cline =~# '^\s*>\s* let l:retv = l:pindent - &shiftwidth elseif l:pline =~# '\s*typename\s*.*>\s* let l:retv = l:pindent - &shiftwidth elseif l:pline =~# '^\s*namespace.*' let l:retv = 0 endif return l:retv endfunction if has("autocmd") autocmd BufEnter *.{cc,cxx,cpp,h,hh,hpp,hxx} setlocal indentexpr=CppNoNamespaceAndTemplateIndent() endifMy solution:
" Don't indent namespace and template function! CppNoNamespaceAndTemplateIndent() let l:cline_num = line('.') let l:cline = getline(l:cline_num) let l:pline_num = prevnonblank(l:cline_num - 1) let l:pline = getline(l:pline_num) while l:pline =~# '\(^\s*{\s*\|^\s*//\|^\s*/\*\|\*/\s*$\)' let l:pline_num = prevnonblank(l:pline_num - 1) let l:pline = getline(l:pline_num) endwhile let l:retv = cindent('.') let l:pindent = indent(l:pline_num) if l:pline =~# '^\s*template\s*\s* let l:retv = l:pindent elseif l:pline =~# '\s*typename\s*.*,\s* let l:retv = l:pindent elseif l:cline =~# '^\s*>\s* let l:retv = l:pindent - &shiftwidth elseif l:pline =~# '\s*typename\s*.*>\s* let l:retv = l:pindent - &shiftwidth elseif l:pline =~# '^\s*namespace.*' let l:retv = 0 endif return l:retv endfunction if has("autocmd") autocmd BufEnter *.{cc,cxx,cpp,h,hh,hpp,hxx} setlocal indentexpr=CppNoNamespaceAndTemplateIndent() endif您可以使用 identexpr 选项通过评估 < a href="http://vimdoc.sourceforge.net/htmldoc/indent.html#indent-expression" rel="nofollow noreferrer">表达式（即编写vim脚本函数）。 这个函数应该接受一个字符串——行——并返回要缩进的空格数。 这使您可以灵活地返回此模板条件的缩进级别，或回退到 自动缩进、smartindent 或 cindent 在正常的、类似 C 的情况下。
这是一个为处理 Qt 的信号和槽扩展而创建的示例。 它演示了 cindent 函数的回退。
You can use the identexpr option to specify indent by evaluating an expression (i.e. writing a vim script function). This function should accept a string -- the line -- and return the number of spaces to indent. This gives you the flexibility to return an indent level for this template condition, or fall-back to autoindent, smartindent or cindent in normal, C-like situations.
Here is an example that was created to handle the signals and slots extension of Qt. It demonstrates fall-back to the cindent function.