StringHelpers

IsNumeric

Internal helper function

static bool IsNumeric(const std::string str, const bool allowDecimalPoint = false)

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A static helper function.

Will return true, if str is a purely numeric (base 10) string, including signage (preceding '-').

If allowDecimalPoint is set to true, it will also allow decimal values (like 0.123).

It basically says: "Can you std::stoll / std::stold this string?"

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Examples:

StringHelpers::IsNumeric("Donald Trump")  // false
StringHelpers::IsNumeric("Donald Trump5") // false
StringHelpers::IsNumeric("5Donald Trump") // false
StringHelpers::IsNumeric("12a")           // false
StringHelpers::IsNumeric("0x53")          // false
StringHelpers::IsNumeric("12")            // true
StringHelpers::IsNumeric("-12")           // true
StringHelpers::IsNumeric("12.0")          // false
StringHelpers::IsNumeric("12.0", true)    // true
StringHelpers::IsNumeric("12.0.5", true)  // false
StringHelpers::IsNumeric("-")             // false
StringHelpers::IsNumeric("-.", true)      // false
StringHelpers::IsNumeric(".", true)       // false