4.5.4 Unary Adding Operators
unary adding operators + (identity) and – (negation) are predefined
for every specific numeric type T
with their conventional meaning.
They have the following specifications:
function "+"(Right : T) return T
function "-"(Right : T) return T
NOTE For modular integer types, the
unary adding operator –, when given a nonzero operand, returns
the result of subtracting the value of the operand from the modulus;
for a zero operand, the result is zero.
Ada 2005 and 2012 Editions sponsored in part by Ada-Europe