Adds unittest for #207 and updates CHANGELOG

Author: gnikit

CHANGELOG.md

@@ -23,6 +23,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Fixes preprocessor syntax highlighting with derived type and conditionals
   ([#249](https://github.com/krvajal/vscode-fortran-support/issues/249))
 - Fixes the general preprocessor syntax highlighting and adds testing
+- Fixes using function/subroutine as parameter in functions/subroutines
+  ([#207](https://github.com/krvajal/vscode-fortran-support/issues/207))
 
 ### Added
 

test/resources/function_subroutine_definitions.f90

@@ -0,0 +1,50 @@
+interface function_subroutine_definitions
+
+  ! Normal subroutine
+  subroutine sub( arg )
+    integer, intent(inout) :: arg
+  end subroutine
+
+  ! Normal functions
+  integer function fun_integer( arg ) result(val)
+    integer, intent(inout) :: arg
+  end function fun_integer
+
+  real function fun_real( arg ) result(val)
+    integer, intent(inout) :: arg
+  end function fun_real
+
+  logical function fun_logical( arg ) result(val)
+    integer, intent(inout) :: arg
+  end function fun_logical
+
+  character(kind=1, len=100) function fun_character( arg ) result(val)
+    integer, intent(inout) :: arg
+  end function fun_character
+
+  double precision function fun_double_precision( arg ) result(val)
+    integer, intent(inout) :: arg
+  end function fun_double_precision
+
+  double complex function fun_double_complex( arg ) result(val)
+    integer, intent(inout) :: arg
+  end function fun_double_complex
+
+  ! Weird edge cases where the keyword function/subroutine is also used as arguments
+  function fun_with_fun(   function )
+    integer, intent(inout) :: function
+  end function fun_with_fun
+
+  function fun_with_sub( subroutine )
+    integer, intent(inout) :: subroutine
+  end function fun_with_sub
+
+  subroutine sub_with_sub(   subroutine  )
+    integer, intent(inout) :: subroutine
+  end subroutine sub_with_sub
+
+  subroutine sub_with_fun( function )
+    integer, intent(inout) :: function
+  end subroutine sub_with_fun
+
+end interface function_subroutine_definitions