fluent4rs 2.3.1

Parser / codec for [Fluent FTL files](https://github.com/projectfluent/fluent/blob/master/spec/fluent.ebnf), written for [lingora](https://github.com/nigeleke/lingora) (a localization management program), and may be found to be useful outside of that context. It is not intended to replace any aspects of the [fluent-rs](https://github.com/projectfluent/fluent-rs) crate implemented by [Project Fluent](https://projectfluent.org/), and, for the majority of language translation needs, the reader is referred back to that crate.
Documentation 
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#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};

use super::{InlineExpression, VariantList};
#[cfg(feature = "walker")]
use crate::walker::{Visitor, Walkable, Walker};

/// [SelectExpression](crate::ast::SelectExpression) ::= [InlineExpression](crate::ast::InlineExpression) blank? "->" blank_inline? variant_list
#[derive(Clone, Debug, PartialEq)]
#[cfg_attr(feature = "hash", derive(Eq, PartialOrd, Ord, Hash))]
#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
pub struct SelectExpression {
    inline_expression: InlineExpression,
    variant_list: VariantList,
}

impl SelectExpression {
    /// Constructs a new `SelectExpression` representing a plural/category selection in Fluent.
    ///
    /// # Arguments
    /// * `inline_expression` - The selector expression whose value determines which variant is chosen.
    /// * `variant_list` - The list of variants, including exactly one default variant.
    pub fn new(inline_expression: InlineExpression, variant_list: VariantList) -> Self {
        Self {
            inline_expression,
            variant_list,
        }
    }

    /// Returns a reference to the selector expression of this select expression.
    pub fn inline_expression(&self) -> &InlineExpression {
        &self.inline_expression
    }
}

#[cfg(feature = "walker")]
impl Walkable for SelectExpression {
    fn walk(&self, visitor: &mut dyn Visitor) {
        visitor.visit_select_expression(self);
        Walker::walk(&self.inline_expression, visitor);
        Walker::walk(&self.variant_list, visitor);
    }
}

impl std::fmt::Display for SelectExpression {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{} -> {}", self.inline_expression, self.variant_list)
    }
}