Macro fpdec_macros::Dec

Dec!() { /* proc-macro */ }

Macro used to convert a number literal into a Decimal.

The literal must be in the form [+|-]<int>[.<frac>][<e|E>[+|-]<exp>] or [+|-].<frac>[<e|E>[+|-]<exp>].

The resulting number of fractional digits is determined by the number of digits in the fractional part of the literal minus the value of the signed exponent.

The resulting value must not exceed the limits given by the internal representaion of Decimal:

• The coefficient must fit into an i128.
• The number of fractional digits must not exceed the constant MAX_N_FRAC_DIGITS.

Panics

The macro panics if the conditions listed above are not met!

Examples

let d = Dec!(17.5);
assert_eq!(d.to_string(), "17.5");

let d = Dec!(-170.5e-2);
assert_eq!(d.to_string(), "-1.705");