Enum fluent_syntax::ast::Expression

pub enum Expression<S> {
    Select {
        selector: InlineExpression<S>,
        variants: Vec<Variant<S>>,
    },
    Inline(InlineExpression<S>),
}

An expression that is either a select expression or an inline expression.

Example

use fluent_syntax::parser;
use fluent_syntax::ast;

let ftl = r#"

key = { $var ->
    [key1] Value 1
   *[other] Value 2
}

"#;

let resource = parser::parse(ftl)
    .expect("Failed to parse an FTL resource.");

assert_eq!(
    resource,
    ast::Resource {
        body: vec![
            ast::Entry::Message(ast::Message {
                id: ast::Identifier {
                    name: "key"
                },
                value: Some(ast::Pattern {
                    elements: vec![
                        ast::PatternElement::Placeable {
                            expression: ast::Expression::Select {
                                selector: ast::InlineExpression::VariableReference {
                                    id: ast::Identifier { name: "var" },
                                },
                                variants: vec![
                                    ast::Variant {
                                        key: ast::VariantKey::Identifier {
                                            name: "key1"
                                        },
                                        value: ast::Pattern {
                                            elements: vec![
                                                ast::PatternElement::TextElement {
                                                    value: "Value 1",
                                                }
                                            ]
                                        },
                                        default: false,
                                    },
                                    ast::Variant {
                                        key: ast::VariantKey::Identifier {
                                            name: "other"
                                        },
                                        value: ast::Pattern {
                                            elements: vec![
                                                ast::PatternElement::TextElement {
                                                    value: "Value 2",
                                                }
                                            ]
                                        },
                                        default: true,
                                    },
                                ]
                            }
                        }
                    ]
                }),
                attributes: vec![],
                comment: None,
            }),
        ]
    }
);

Variants

Select

A select expression such as:

key = { $var ->
    [key1] Value 1
   *[other] Value 2
}

Fields

selector: InlineExpression<S>

variants: Vec<Variant<S>>

Inline(InlineExpression<S>)

An inline expression such as ${ username }:

hello-user = Hello ${ username }

Trait Implementations

impl<S: Clone> Clone for Expression<S>

fn clone(&self) -> Expression<S>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<S: Debug> Debug for Expression<S>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<S: PartialEq> PartialEq for Expression<S>

fn eq(&self, other: &Expression<S>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<S> StructuralPartialEq for Expression<S>