smartOp.unary

Perform the unary (single-argument) integer operation specified by op.

Key differences from the standard unary operators:

- and + always return a signed value.
- is checked for overflow, because -int.min is greater than int.max.
++ and -- are checked for overflow.

Note that like the standard operators, ++ and -- take the operand by ref and overwrite its value with the result.

N unary(N num)
IntFromChar!N unary(N num)
Signed!(Promoted!N) unary(N num)
N unary(N num)
template smartOp(IntFlagPolicy policy)
@safe
N
unary
(
string op
N
)
(
ref N num
)
if (
isIntegral!N &&
op.among!("++", "--")
)

Examples

import checkedint.noex : smartOp; // use IntFlagPolicy.noex

assert(smartOp.unary!"~"(0u) == uint.max);

auto a = smartOp.unary!"-"(20uL);
static assert(is(typeof(a) == long));
assert(a == -20);

auto b = smartOp.unary!"+"(uint.max);
static assert(is(typeof(b) == int));
assert(IntFlags.local.clear() == IntFlag.posOver);

uint c = 1u;
assert(smartOp.unary!"--"(c) == 0u);
assert(c == 0u);
smartOp.unary!"--"(c);
assert(IntFlags.local.clear() == IntFlag.negOver);

int d = 7;
assert(smartOp.unary!"++"(d) == 8);
assert(d == 8);

smartOp.unary

Examples

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