Ada Programming/Attributes/'Machine Radix

Computing » Computer Science » Computer Programming » Ada Programming

---

Description

X'Machine_Radix is an Ada attribute where X is any floating or fixed point type. It returns the radix of the hardware representation of type X. On most machines this will be 2.

Machine_Radix is also an Ada aspect that may be set for decimal fixed point types via an attribute definition clause. The value is constrained to either 2 or 10.

Example

 with Ada.Text_IO;

 procedure Machine_Radix is

   package T_IO renames Ada.Text_IO;
   package I_IO is new  Ada.Text_IO.Integer_IO (Integer);

   type My_Fixed_Point_Type is delta 0.1 range -1.0 .. 1.0;
   type My_Decimal_Type is delta 0.01 digits 10;
 begin
   T_IO.Put ("Radix of Float type            = ");
   I_IO.Put (Float'Machine_Radix);
   T_IO.New_Line;

   T_IO.Put ("Radix of My_Fixed_Point_Type   = ");
   I_IO.Put (My_Fixed_Point_Type'Machine_Radix);
   T_IO.New_Line;

   T_IO.Put ("Radix of My_Decimal_Type type  = ");
   I_IO.Put (My_Decimal_Type'Machine_Radix);
   T_IO.New_Line;
 end Machine_Radix;

The output with GNAT 4.6 on the x86-64 architecture is:

Radix of Float type            =           2
Radix of My_Fixed_Point_Type   =           2
Radix of My_Decimal_Type type  =           2

See also

Wikibook

• Ada Programming
• Ada Programming/Attributes
• Ada Programming/Attributes/'Machine_Emax
• Ada Programming/Attributes/'Machine_Emin
• Ada Programming/Attributes/'Machine_Mantissa

Ada Reference Manual

• A.5.3: Attributes of Floating Point Types ^[Annotated]
• A.5.4: Attributes of Fixed Point Types ^[Annotated]
• Annex K: Language-Defined Aspects and Attributes ^[Annotated]