enable to use v:true/v:false in config

Author: rhysd

autoload/clang_format.vim

@@ -2,6 +2,12 @@ let s:save_cpo = &cpo
 set cpo&vim
 
 let s:on_windows = has('win32') || has('win64')
+let s:dict_t = type({})
+if exists('v:true')
+    let s:bool_t = type(v:true)
+else
+    let s:bool_t = -1
+endif
 
 " helper functions {{{
 function! s:has_vimproc() abort
@@ -36,15 +42,18 @@ function! s:system(str, ...) abort
 endfunction
 
 function! s:create_keyvals(key, val) abort
-    if type(a:val) == type({})
+    if type(a:val) == s:dict_t
         return a:key . ': {' . s:stringize_options(a:val) . '}'
     else
-        return a:key . ': ' . a:val
+        if type(a:val) == s:bool_t
+            return a:key . (a:val == v:true ? ': true' : ': false')
+        else
+            return a:key . ': ' . a:val
+        endif
     endif
 endfunction
 
 function! s:stringize_options(opts) abort
-    let dict_type = type({})
     let keyvals = map(items(a:opts), 's:create_keyvals(v:val[0], v:val[1])')
     return join(keyvals, ',')
 endfunction

t/clang_format_spec.vim

@@ -165,20 +165,6 @@ describe 'clang_format#format()'
         Expect pos == getpos('.')
     end
 
-    it 'formats following g:clang_format#style_options'
-        let saved = [g:clang_format#style_options, &expandtab, &shiftwidth]
-        try
-            set expandtab
-            set shiftwidth=4
-            let g:clang_format#style_options = {'UseTab' : 'false', 'IndentWidth' : 4}
-            call s:expect_the_same_output(1, line('$'))
-        finally
-            let g:clang_format#style_options = saved[0]
-            let &expandtab = saved[1]
-            let &shiftwidth = saved[2]
-        endtry
-    end
-
     it 'ensures to fix issue #38'
         let saved = g:clang_format#style_options
         try
@@ -362,6 +348,37 @@ describe ':ClangFormat'
 end
 " }}}
 
+" test for customizing formatting {{{
+describe 'g:clang_format#style_options'
+    before
+        let g:clang_format#detect_style_file = 0
+        new
+        execute 'silent' 'edit!' './'.s:root_dir.'t/test.cpp'
+
+        let s:saved_styles = [g:clang_format#style_options, &expandtab, &shiftwidth]
+        set expandtab
+        set shiftwidth=4
+    end
+
+    after
+        close!
+        let [g:clang_format#style_options, &expandtab, &shiftwidth] = s:saved_styles
+    end
+
+    it 'customizes code styles'
+        let g:clang_format#style_options = {'UseTab' : 'false', 'IndentWidth' : 4}
+        call s:expect_the_same_output(1, line('$'))
+    end
+
+    it 'can contain v:true/v:false'
+        if exists('v:false')
+            let g:clang_format#style_options = {'UseTab' : v:false, 'IndentWidth' : 4}
+            call s:expect_the_same_output(1, line('$'))
+        endif
+    end
+end
+" }}}
+
 " test for auto formatting {{{
 describe 'g:clang_format#auto_format'