The OpenD Programming Language

isNumeric

Takes a string s and determines if it represents a number. This function also takes an optional parameter, bAllowSep, which will accept the separator characters ',' and '__' within the string. But these characters should be stripped from the string before using any of the conversion functions like to!int(), to!float(), and etc else an error will occur.

Also please note, that no spaces are allowed within the string anywhere whether it's a leading, trailing, or embedded space(s), thus they too must be stripped from the string before using this function, or any of the conversion functions.

bool
isNumeric
(
S
)
(
S s
,
bool bAllowSep = false
)

Parameters

s S

the string or random access range to check

bAllowSep bool

accept separator characters or not

Return Value

Type: bool

bool

Examples

Integer Whole Number: (byte, ubyte, short, ushort, int, uint, long, and ulong) ['+'|'-']digit(s)L|UL

assert(isNumeric("123"));
assert(isNumeric("123UL"));
assert(isNumeric("123L"));
assert(isNumeric("+123U"));
assert(isNumeric("-123L"));

Floating-Point Number: (float, double, real, ifloat, idouble, and ireal) ['+'|'-']digit(s).[digit(s)][[e-|e+]digit(s)]f|L|Li|fi] or nani|inf|-inf

assert(isNumeric("+123"));
assert(isNumeric("-123.01"));
assert(isNumeric("123.3e-10f"));
assert(isNumeric("123.3e-10fi"));
assert(isNumeric("123.3e-10L"));

assert(isNumeric("nan"));
assert(isNumeric("nani"));
assert(isNumeric("-inf"));

Floating-Point Number: (cfloat, cdouble, and creal) ['+'|'-']digit(s).[digit(s)][[e-|e+]digit(s)][+] [digit(s).[digit(s)][[e-|e+]digit(s)]f|L|Li|fi] or nani|nan+nani|inf|-inf

assert(isNumeric("-123e-1+456.9e-10Li"));
assert(isNumeric("+123e+10+456i"));
assert(isNumeric("123+456"));

isNumeric works with CTFE

enum a = isNumeric("123.00E-5+1234.45E-12Li");
enum b = isNumeric("12345xxxx890");

static assert( a);
static assert(!b);

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