Update to include int32 hashmap keytype

doc/specs/stdlib_hashmaps.md

@@ -157,11 +157,13 @@ Procedures to manipulate `key_type` data:
   `key_in`, to contents of the key, `key_out`.
 
 * `get( key, value )` - extracts the contents of `key` into `value`,
-  an `int8` array or character string.
+  an `int8` array, 'int32' array, or character string.
 
 * `free_key( key )` - frees the memory in `key`.
 
-* `set( key, value )` - sets the content of `key` to `value`.
+* `set( key, value )` - sets the content of `key` to `value`.  
+  Supported key types are `int8` array, `int32` array, and character
+  string.
 
 Procedures to manipulate `other_type` data:
 
@@ -474,9 +476,9 @@ is an `intent(in)` argument.
 
 `value`: if the the first argument is of `key_type` `value` shall be
 an allocatable default character string variable, or 
-an allocatable vector variable of type integer and kind `int8`,
-otherwise the first argument is of `other_type` and `value` shall be
-an allocatable of `class(*)`. It is an `intent(out)` argument.
+an allocatable vector variable of type integer and kind `int8` or 
+`int32`, otherwise the first argument is of `other_type` and `value` 
+shall be an allocatable of `class(*)`. It is an `intent(out)` argument.
 
 ##### Example
 
@@ -751,13 +753,14 @@ is an `intent(out)` argument.
 
 `value`: if the first argument is `key` `value` shall be a default
 character string scalar expression, or a vector expression of type integer
-and kind `int8`, while for a first argument of type `other` `value`
-shall be of type `class(*)`. It is an `intent(in)` argument.
+and kind `int8` or `int32`, while for a first argument of type 
+`other` `value` shall be of type `class(*)`. It is an `intent(in)` 
+argument.
 
 ##### Note
 
-Values of types other than a scalar default character or an
-`int8` vector can be used as the basis of a `key` by transferring the
+Values of types other than a scalar default character or and
+`int8` or `int32` vector can be used as the basis of a `key` by transferring the
 value to an `int8` vector.
 
 ##### Example

src/stdlib_hashmap_wrappers.f90

@@ -88,6 +88,7 @@ end function hasher_fun
 
         module procedure get_char_key,   &
                          get_int8_key,   &
+                         get_int32_key,   &
                          get_other
 
     end interface get
@@ -101,6 +102,7 @@ end function hasher_fun
 
         module procedure set_char_key,   &
                          set_int8_key,   &
+                         set_int32_key, &
                          set_other
 
     end interface set
@@ -277,6 +279,21 @@ subroutine get_int8_key( key, value )
     end subroutine get_int8_key
 
 
+    pure subroutine get_int32_key( key, value )
+!! Version: Experimental
+!!
+!! Gets the contents of the key as an INTEGER(INT32) vector
+!! Arguments:
+!!     key   - the input key
+!!     value - the contents of key mapped to an INTEGER(INT32) vector
+        type(key_type), intent(in)              :: key
+        integer(int32), allocatable, intent(out) :: value(:)
+
+        value = transfer( key % value, value )
+
+    end subroutine get_int32_key
+
+
     subroutine set_char_key( key, value )
 !! Version: Experimental
 !!
@@ -323,6 +340,21 @@ subroutine set_int8_key( key, value )
     end subroutine set_int8_key
 
 
+    pure subroutine set_int32_key( key, value )
+!! Version: Experimental
+!!
+!! Sets the contents of the key from an INTEGER(INT32) vector
+!! Arguments:
+!!     key   - the output key
+!!     value - the input INTEGER(INT32) vector
+        type(key_type), intent(out) :: key
+        integer(int32), intent(in)   :: value(:)
+
+        key % value = transfer(value, key % value)
+
+    end subroutine set_int32_key
+
+
     pure function fnv_1_hasher( key )
 !! Version: Experimental
 !!