Contents   Index   Search   Previous   Next

3.3.2 Number Declarations

1
   A number_declaration declares a named number.

Syntax

2
number_declaration ::=
     defining_identifier_list : constant := static_expression;

Name Resolution Rules

3
   The static_expression given for a number_declaration is expected to be of any numeric type.

Legality Rules

4
   The static_expression given for a number declaration shall be a static expression, as defined by clause 4.9.

Static Semantics

5
   The named number denotes a value of type universal_integer if the type of the static_expression is an integer type. The named number denotes a value of type universal_real if the type of the static_expression is a real type.
6
   The value denoted by the named number is the value of the static_expression, converted to the corresponding universal type.

Dynamic Semantics

7
   The elaboration of a number_declaration has no effect.

Examples

8
   Examples of number declarations:
9
Two_Pi        : constant := 2.0*Ada.Numerics.Pi;   -- a real number (see A.5)
10
Max           : constant := 500;                   -- an integer number
Max_Line_Size : constant := Max/6                  -- the integer 83
Power_16      : constant := 2**16;                 -- the integer 65_536
One, Un, Eins : constant := 1;                     -- three different names for 1

Contents   Index   Search   Previous   Next   Legal