promote ascii pure functions to elemental

Author: wassup05

src/stdlib_ascii.fypp

@@ -107,47 +107,47 @@ module stdlib_ascii
 contains
 
     !> Checks whether `c` is an ASCII letter (A .. Z, a .. z).
-    pure logical function is_alpha(c)
+    elemental logical function is_alpha(c)
         character(len=1), intent(in) :: c !! The character to test.
         is_alpha = (c >= 'A' .and. c <= 'Z') .or. (c >= 'a' .and. c <= 'z')
     end function
 
     !> Checks whether `c` is a letter or a number (0 .. 9, a .. z, A .. Z).
-    pure logical function is_alphanum(c)
+    elemental logical function is_alphanum(c)
         character(len=1), intent(in) :: c !! The character to test.
         is_alphanum = (c >= '0' .and. c <= '9') .or. (c >= 'a' .and. c <= 'z') &
             .or. (c >= 'A' .and. c <= 'Z')
     end function
 
     !> Checks whether or not `c` is in the ASCII character set -
     !> i.e. in the range 0 .. 0x7F.
-    pure logical function is_ascii(c)
+    elemental logical function is_ascii(c)
         character(len=1), intent(in) :: c !! The character to test.
         is_ascii = iachar(c) <= int(z'7F')
     end function
 
     !> Checks whether `c` is a control character.
-    pure logical function is_control(c)
+    elemental logical function is_control(c)
         character(len=1), intent(in) :: c !! The character to test.
         integer :: ic
         ic = iachar(c)
         is_control = ic < int(z'20') .or. ic == int(z'7F')
     end function
 
     !> Checks whether `c` is a digit (0 .. 9).
-    pure logical function is_digit(c)
+    elemental logical function is_digit(c)
         character(len=1), intent(in) :: c !! The character to test.
         is_digit = ('0' <= c) .and. (c <= '9')
     end function
 
     !> Checks whether `c` is a digit in base 8 (0 .. 7).
-    pure logical function is_octal_digit(c)
+    elemental logical function is_octal_digit(c)
         character(len=1), intent(in) :: c !! The character to test.
         is_octal_digit = (c >= '0') .and. (c <= '7');
     end function
 
     !> Checks whether `c` is a digit in base 16 (0 .. 9, A .. F, a .. f).
-    pure logical function is_hex_digit(c)
+    elemental logical function is_hex_digit(c)
         character(len=1), intent(in) :: c !! The character to test.
         is_hex_digit = (c >= '0' .and. c <= '9') .or. (c >= 'a' .and. c <= 'f') &
             .or. (c >= 'A' .and. c <= 'F')
@@ -156,7 +156,7 @@ contains
     !> Checks whether or not `c` is a punctuation character. That includes
     !> all ASCII characters which are not control characters, letters,
     !> digits, or whitespace.
-    pure logical function is_punctuation(c)
+    elemental logical function is_punctuation(c)
         character(len=1), intent(in) :: c !! The character to test.
         integer :: ic
         ic = iachar(c) !       '~'                 '!'
@@ -166,7 +166,7 @@ contains
 
     !> Checks whether or not `c` is a printable character other than the
     !> space character.
-    pure logical function is_graphical(c)
+    elemental logical function is_graphical(c)
         character(len=1), intent(in) :: c !! The character to test.
         integer :: ic
         ic = iachar(c)
@@ -177,7 +177,7 @@ contains
 
     !> Checks whether or not `c` is a printable character - including the
     !> space character.
-    pure logical function is_printable(c)
+    elemental logical function is_printable(c)
         character(len=1), intent(in) :: c !! The character to test.
         integer :: ic
         ic = iachar(c)
@@ -186,23 +186,23 @@ contains
     end function
 
     !> Checks whether `c` is a lowercase ASCII letter (a .. z).
-    pure logical function is_lower(c)
+    elemental logical function is_lower(c)
         character(len=1), intent(in) :: c !! The character to test.
         integer :: ic
         ic = iachar(c)
         is_lower = ic >= iachar('a') .and. ic <= iachar('z')
     end function
 
     !> Checks whether `c` is an uppercase ASCII letter (A .. Z).
-    pure logical function is_upper(c)
+    elemental logical function is_upper(c)
         character(len=1), intent(in) :: c !! The character to test.
         is_upper = (c >= 'A') .and. (c <= 'Z')
     end function
 
     !> Checks whether or not `c` is a whitespace character. That includes the
     !> space, tab, vertical tab, form feed, carriage return, and linefeed
     !> characters.
-    pure logical function is_white(c)
+    elemental logical function is_white(c)
         character(len=1), intent(in) :: c !! The character to test.
         integer :: ic
         ic = iachar(c)             ! TAB, LF, VT, FF, CR
@@ -211,7 +211,7 @@ contains
 
     !> Checks whether or not `c` is a blank character. That includes the
     !> only the space and tab characters
-    pure logical function is_blank(c)
+    elemental logical function is_blank(c)
         character(len=1), intent(in) :: c !! The character to test.
         integer :: ic
         ic = iachar(c)             ! TAB