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4.5.4 Unary Adding Operators
Static Semantics
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{unary
adding operator} {operator
(unary adding)} {+
operator} {operator
(+)} {plus operator}
{operator (plus)} {-
operator} {operator
(-)} {minus operator}
{operator (minus)}
The unary adding operators + (identity) and - (negation)
are predefined for every specific numeric type
T with their conventional
meaning. They have the following specifications:
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function "+"(Right : T) return T
function "-"(Right : T) return T
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16 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.
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