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//! This module has a few utility functions.

use super::*;

mod default_theme;

pub use self::default_theme::*;

/// Checks that `name` is a valid variable name.
///
/// A variable name may only consist of latin letters, digits and the underscore
/// (`_`).
///
/// # Examples
///
/// ```
/// use tdesktop_theme::utils::is_variable_name_valid;
///
/// assert!(is_variable_name_valid("windowBg"));
/// assert!(is_variable_name_valid("window_bg"));
/// assert!(!is_variable_name_valid("window     Bg"));
/// assert!(!is_variable_name_valid("ываываывыδφγδσ"));
/// assert!(!is_variable_name_valid("!#@$)@"));
/// ```
pub fn is_variable_name_valid(name: &str) -> bool {
  name.chars().all(|symbol| {
    (symbol >= 'a' && symbol <= 'z')
    || (symbol >= 'A' && symbol <= 'Z')
    || (symbol >= '0' && symbol <= '9')
    || symbol == '_'
  })
}