bug#14442: On syntax decoration of identifiers containing underscore and statements word [f90]

[Stefan Monnier <monnier@IRO.UMontreal.CA>]

> ..but I have to flag another little issue..

Please report these as bug (i.e. via report-emacs-bug or to
bug-gnu-emacs@gnu.org).

> In the code

>   public ExitProcess
>   interface
>      subroutine ExitProcess(uExitCode) bind(C,name='ExitProcess')
>        import
>        !GCC$ ATTRIBUTES STDCALL :: ExitProcess
>        integer(UINT_T), intent(in), value :: uExitCode
>      end subroutine ExitProcess
>   end interface

> the identifier "ExitProcess" after "public" (first line) has: "Exit" in
> magenta and "Process" in cyan. Shouldn't it be all in black?("ExitProcess"
> after "subroutine" is all in blue as expected)

At least this problem was not introduced by my recent change.  It was
already present in Emacs-24.2 (among other versions).

The patch below seems to fix it, but I don't know enough the rules of
Fortran syntax to be sure it's the right thing to do.  There are
probably other cases, by the way (the patch below also fixes one other
case for "implicitreal").


        Stefan


=== modified file 'lisp/progmodes/f90.el'
--- lisp/progmodes/f90.el	2013-05-17 00:36:33 +0000
+++ lisp/progmodes/f90.el	2013-05-22 22:16:01 +0000
@@ -641,16 +641,16 @@
 forall\\|block\\|critical\\)\\)\\_>"
       (2 font-lock-constant-face nil t) (3 font-lock-keyword-face))
     ;; Implicit declaration.
-    '("\\_<\\(implicit\\)[ \t]*\\(real\\|integer\\|c\\(haracter\\|omplex\\)\
+    '("\\_<\\(implicit\\)[ \t]+\\(real\\|integer\\|c\\(haracter\\|omplex\\)\
 \\|enumerator\\|procedure\\|\
 logical\\|double[ \t]*precision\\|type[ \t]*(\\(?:\\sw\\|\\s_\\)+)\\|none\\)[ \t]*"
       (1 font-lock-keyword-face) (2 font-lock-type-face))
-    '("\\_<\\(namelist\\|common\\)[ \t]*\/\\(\\(?:\\sw\\|\\s_\\)+\\)?\/"
+    '("\\_<\\(namelist\\|common\\)[ \t]*/\\(\\(?:\\sw\\|\\s_\\)+\\)?\/"
       (1 font-lock-keyword-face) (2 font-lock-constant-face nil t))
     "\\_<else\\([ \t]*if\\|where\\)?\\_>"
     '("\\(&\\)[ \t]*\\(!\\|$\\)"  (1 font-lock-keyword-face))
     "\\_<\\(then\\|continue\\|format\\|include\\|stop\\|return\\)\\_>"
-    '("\\_<\\(exit\\|cycle\\)[ \t]*\\(\\(?:\\sw\\|\\s_\\)+\\)?\\_>"
+    '("\\_<\\(exit\\|cycle\\)[ \t]+\\(\\(?:\\sw\\|\\s_\\)+\\)?\\_>"
       (1 font-lock-keyword-face) (2 font-lock-constant-face nil t))
     '("\\_<\\(case\\)[ \t]*\\(default\\|(\\)" . 1)
     ;; F2003 "class default".