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Function dmd.utils.parseDigits
Convert string to integer.
bool parseDigits(T)
(
ref T val,
const(char)[] p,
const T max = T .max
) pure nothrow @nogc @safe;
Parameters
Name | Description |
---|---|
T | Type of integer to parse |
val | Variable to store the result in |
p | slice to start of string digits |
max | max allowable value (inclusive), defaults to T |
Returns
false
on error, true
on success
Example
byte b;
ubyte ub;
short s;
ushort us;
int i;
uint ui;
long l;
ulong ul;
assert(b .parseDigits("42") && b == 42);
assert(ub .parseDigits("42") && ub == 42);
assert(s .parseDigits("420") && s == 420);
assert(us .parseDigits("42000") && us == 42_000);
assert(i .parseDigits("420000") && i == 420_000);
assert(ui .parseDigits("420000") && ui == 420_000);
assert(l .parseDigits("42000000000") && l == 42_000_000_000);
assert(ul .parseDigits("82000000000") && ul == 82_000_000_000);
assert(!b .parseDigits(ubyte .max .stringof));
assert(!b .parseDigits("WYSIWYG"));
assert(!b .parseDigits("-42"));
assert(!b .parseDigits("200"));
assert(ub .parseDigits("200") && ub == 200);
assert(i .parseDigits(int .max .stringof) && i == int .max);
assert(i .parseDigits("420", 500) && i == 420);
assert(!i .parseDigits("420", 400));
Authors
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.