Merge pull request doxygen#60 from albert-github/feature/bug_impure

Fortran added keyword IMPURE

Author: Dimitri van Heesch

src/fortrancode.l

@@ -684,14 +684,14 @@ CHAR      (CHARACTER{ARGS}?|CHARACTER{BS}"*"({BS}[0-9]+|{ARGS}))
 TYPE_SPEC (({NUM_TYPE}({BS}"*"{BS}[0-9]+)?)|({NUM_TYPE}{KIND})|DOUBLE{BS_}COMPLEX|DOUBLE{BS_}PRECISION|{CHAR})
 
 INTENT_SPEC intent{BS}"("{BS}(in|out|in{BS}out){BS}")"
-ATTR_SPEC (IMPLICIT|ALLOCATABLE|DIMENSION{ARGS}|EXTERNAL|{INTENT_SPEC}|INTRINSIC|OPTIONAL|PARAMETER|POINTER|PROTECTED|PRIVATE|PUBLIC|SAVE|TARGET|RECURSIVE|PURE|ELEMENTAL)
+ATTR_SPEC (IMPLICIT|ALLOCATABLE|DIMENSION{ARGS}|EXTERNAL|{INTENT_SPEC}|INTRINSIC|OPTIONAL|PARAMETER|POINTER|PROTECTED|PRIVATE|PUBLIC|SAVE|TARGET|RECURSIVE|PURE|IMPURE|ELEMENTAL)
 ACCESS_SPEC (PROTECTED|PRIVATE|PUBLIC)
 /* Assume that attribute statements are almost the same as attributes. */
 ATTR_STMT {ATTR_SPEC}|DIMENSION
 FLOW  (DO|SELECT|CASE|WHERE|IF|THEN|ELSE|WHILE|FORALL|ELSEWHERE|ELSEIF|RETURN|CONTINUE|EXIT)
 COMMANDS  (FORMAT|CONTAINS|MODULE{BS_}PROCEDURE|WRITE|READ|ALLOCATE|ALLOCATED|ASSOCIATED|DEALLOCATE|SIZE|INQUIRE|OPEN|CLOSE|DATA|COMMON)
 IGNORE (CALL)
-PREFIX    (RECURSIVE{BS_}|PURE{BS_}|ELEMENTAL{BS_}){0,2}(RECURSIVE|PURE|ELEMENTAL)?
+PREFIX    (RECURSIVE{BS_}|IMPURE{BS_}|PURE{BS_}|ELEMENTAL{BS_}){0,3}(RECURSIVE|IMPURE|PURE|ELEMENTAL)?
 
 /* |  */
 

src/fortranscanner.l

@@ -265,7 +265,7 @@ LANGUAGE_BIND_SPEC BIND{BS}"("{BS}C{BS}(,{BS}NAME{BS}"="{BS}"\""(.*)"\""{BS})?")
 ATTR_STMT {ATTR_SPEC}|DIMENSION|{ACCESS_SPEC}
 
 CONTAINS  CONTAINS
-PREFIX    (RECURSIVE{BS_}|PURE{BS_}|ELEMENTAL{BS_}){0,2}(RECURSIVE|PURE|ELEMENTAL)?
+PREFIX    (RECURSIVE{BS_}|IMPURE{BS_}|PURE{BS_}|ELEMENTAL{BS_}){0,3}(RECURSIVE|IMPURE|PURE|ELEMENTAL)?
 SCOPENAME ({ID}{BS}"::"{BS})*
 
 %option noyywrap
@@ -1170,11 +1170,11 @@ static void extractPrefix(QCString &text)
   int prefixIndex = 0;
   int curIndex = 0;
   bool cont = TRUE;
-  const char* pre[] = {"RECURSIVE","PURE","ELEMENTAL"};
+  const char* pre[] = {"RECURSIVE","IMPURE","PURE","ELEMENTAL"};
   while(cont)
   {
     cont = FALSE;
-    for(unsigned int i=0; i<3; i++)
+    for(unsigned int i=0; i<4; i++)
     {
       if((prefixIndex=text.find(pre[i], curIndex, FALSE))==0)
       {