Function decimal_normal_sample 

pub fn decimal_normal_sample() -> Decimal

Draws a standard normal sample from the thread-local RNG, as a Decimal.

This is the unseeded path: every call reads the thread RNG, so two runs never see the same stream. Reproducible callers use decimal_normal_sample_with with a seeded generator such as crate::utils::deterministic_rng; this function is exactly that helper applied to rand::rng().

Returns

A Decimal sampled from a standard normal distribution (it can be negative).

Examples

use optionstratlib_core::model::decimal::decimal_normal_sample;
let normal = decimal_normal_sample();

The sample is drawn from rand_distr::StandardNormal, which is a unit struct with no constructor and therefore nothing to reject. It replaced Normal::new(0.0, 1.0), whose Err arm had no value to return and so aborted. The two are the same distribution and the same value: Normal samples StandardNormal and applies mean + std_dev * z, which is the identity at (0.0, 1.0).