mazer-atog 0.0.1

lookup table for common mathematical symbols
Documentation 
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use std::collections::HashMap;
use std::sync::LazyLock;

static LETTERS: LazyLock<HashMap<&'static str, &'static str>> = LazyLock::new(|| HashMap::from([
        // greek symbols
        ("alpha", "α"),
        ("Alpha", "Α"),
        ("beta", "β"),
        ("Beta", "Β"),
        ("gamma", "γ"),
        ("Gamma", "Γ"),
        ("delta", "δ"),
        ("Delta", "Δ"),
        ("epsilon", "ε"),
        ("Epsilon", "Ε"),
        ("zeta", "ζ"),
        ("Zeta", "Ζ"),
        ("eta", "η"),
        ("Eta", "Η"),
        ("theta", "θ"),
        ("Theta", "Θ"),
        ("iota", "ι"),
        ("Iota", "Ι"),
        ("kappa", "κ"),
        ("Kappa", "Κ"),
        ("lambda", "λ"),
        ("Lambda", "Λ"),
        ("mu", "μ"),
        ("Mu", "Μ"),
        ("nu", "ν"),
        ("Nu", "Ν"),
        ("xi", "ξ"),
        ("Xi", "Ξ"),
        ("omicron", "ο"),
        ("Omicron", "Ο"),
        ("pi", "π"),
        ("Pi", "Π"),
        ("rho", "ρ"),
        ("Rho", "Ρ"),
        ("sigma", "σ"),
        ("Sigma", "Σ"),
        ("tau", "τ"),
        ("Tau", "Τ"),
        ("upsilon", "υ"),
        ("Upsilon", "Υ"),
        ("phi", "φ"),
        ("Phi", "Φ"),
        ("chi", "χ"),
        ("Chi", "Χ"),
        ("psi", "ψ"),
        ("Psi", "Ψ"),
        ("omega", "ω"),
        ("Omega", "Ω"),
        // more math symbols
        ("infinity", "∞"),
        ("partial", "∂"),
        ("nabla", "∇"),
        ("therefore", "∴"),
        ("angle", "∠"),
        ("degree", "°"),
        ("plusminus", "±"),
        ("times", "×"),
        ("divide", "÷"),
        ("approx", "≈"),
        ("neq", "≠"),
        ("leq", "≤"),
        ("geq", "≥"),
        ("equiv", "≡"),
        ("subset", "⊂"),
        ("supset", "⊃"),
        ("in", "∈"),
        ("notin", "∉"),
        ("union", "∪"),
        ("intersection", "∩"),
        ("forall", "∀"),
        ("exists", "∃"),
        ("emptyset", "∅"),
        ("arrowup", "↑"),
        ("arrowdown", "↓"),
        ("arrowleft", "←"),
        ("arrowright", "→"),
        ("arrow", "→"),
    ]));

pub struct Atog;

impl Atog {
    pub fn get(s: &str) -> Option<&str> {
        LETTERS.get(s).copied()
    }
}

impl IntoIterator for Atog {
    type Item = (&'static str, &'static str);
    type IntoIter = std::collections::hash_map::IntoIter<&'static str, &'static str>;

    fn into_iter(self) -> Self::IntoIter {
        LETTERS.clone().into_iter()
    }
}