Struct fluent_syntax::ast::Pattern

source ·

pub struct Pattern<S> {
    pub elements: Vec<PatternElement<S>>,
}

Expand description

Pattern contains a value of a Message, Term or an Attribute.

Each pattern is a list of PatternElement nodes representing either a simple textual value, or a combination of text literals and placeholder Expression nodes.

§Example

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

let ftl = r#"

hello-world = Hello, World!

welcome = Welcome, { $userName }.

"#;

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: "hello-world"
                },
                value: Some(ast::Pattern {
                    elements: vec![
                        ast::PatternElement::TextElement {
                            value: "Hello, World!"
                        }
                    ]
                }),
                attributes: vec![],
                comment: None,
            }),
            ast::Entry::Message(ast::Message {
                id: ast::Identifier {
                    name: "welcome"
                },
                value: Some(ast::Pattern {
                    elements: vec![
                        ast::PatternElement::TextElement {
                            value: "Welcome, "
                        },
                        ast::PatternElement::Placeable {
                            expression: ast::Expression::Inline(
                                ast::InlineExpression::VariableReference {
                                    id: ast::Identifier {
                                        name: "userName"
                                    }
                                }
                            )
                        },
                        ast::PatternElement::TextElement {
                            value: "."
                        }
                    ]
                }),
                attributes: vec![],
                comment: None,
            }),
        ]
    }
);