Improving the magic regex for C files, plus some tweaks.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4889 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -1,3 +1,6 @@
+2014-05-15  Benno Schulenberg  <bensberg@justemail.net>
+	* doc/syntax/c.nanorc: Improve the magic regex, plus tweaks.
+
 2014-05-14  Benno Schulenberg  <bensberg@justemail.net>
 	* src/winio.c (edit_draw): Poke a non-breaking space into the last
 	column of every line, to startle the terminal into handling wide,

doc/syntax/c.nanorc

@@ -1,7 +1,8 @@
 ## Here is an example for C/C++.
-##
+
 syntax "c" "\.(c(c|pp|xx|\+\+)?|C)$" "\.(h(h|pp|xx)?|H)$" "\.ii?$"
-magic "ASCII C(\+\+)? program text"
+magic "(ASCII|UTF-8 Unicode) C(\+\+)? program text"
+
 color brightred "\<[A-Z_][0-9A-Z_]+\>" 
 color green "\<(float|double|bool|char|int|short|long|sizeof|enum|void|auto|static|const|struct|union|typedef|extern|(un)?signed|inline)\>"
 color green "\<((s?size)|((u_?)?int(8|16|32|64|ptr)))_t\>"
@@ -12,23 +13,21 @@ color magenta "\<(goto|continue|break|return)\>"
 color brightcyan "^[[:space:]]*#[[:space:]]*(define|include(_next)?|(un|ifn?)def|endif|el(if|se)|if|warning|error|pragma)"
 color brightmagenta "'([^'\]|(\\["'abfnrtv\\]))'" "'\\(([0-3]?[0-7]{1,2}))'" "'\\x[0-9A-Fa-f]{1,2}'"
 
-## GCC builtins
+# GCC builtins.
 color cyan "__attribute__[[:space:]]*\(\([^)]*\)\)" "__(aligned|asm|builtin|hidden|inline|packed|restrict|section|typeof|weak)__"
 
-## String highlighting.  You will in general want your comments and
-## strings to come last, because syntax highlighting rules will be
-## applied in the order they are read in.
+# Strings.  In general you will want your strings and comments to come last,
+# because highlighting rules are applied in the order they are read in.
 color brightyellow "<[^= 	]*>" ""(\\.|[^"])*""
-
-## This string is VERY resource intensive!
+# Multiline strings.  This regex is VERY resource intensive!
 color brightyellow start=""(\\.|[^"])*\\[[:space:]]*$" end="^(\\.|[^"])*""
 
-## Comments
+# Comments.
 color brightblue "//.*"
 color brightblue start="/\*" end="\*/"
 
-## Reminders
+# Reminders.
 color ,yellow "(FIXME|TODO|XXX)"
 
-## Trailing whitespace
+# Trailing whitespace.
 color ,green "[[:space:]]+$"