Enum fluent_syntax::ast::InlineExpression

pub enum InlineExpression<S> {
    StringLiteral {
        value: S,
    },
    NumberLiteral {
        value: S,
    },
    FunctionReference {
        id: Identifier<S>,
        arguments: CallArguments<S>,
    },
    MessageReference {
        id: Identifier<S>,
        attribute: Option<Identifier<S>>,
    },
    TermReference {
        id: Identifier<S>,
        attribute: Option<Identifier<S>>,
        arguments: Option<CallArguments<S>>,
    },
    VariableReference {
        id: Identifier<S>,
    },
    Placeable {
        expression: Box<Expression<S>>,
    },
}

A subset of expressions which can be used as Placeable, selector, or in CallArguments.

Example

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

let ftl = r#"

key = { $emailCount }

"#;

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::Inline(
                                    ast::InlineExpression::VariableReference {
                                        id: ast::Identifier {
                                            name: "emailCount"
                                        },
                                    }
                                )
                            },
                        ]
                    }),
                    attributes: vec![],
                    comment: None,
                }
            )
        ]
    }
);

Variants

StringLiteral

Single line string literal enclosed in ".

Example

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

let ftl = r#"

key = { "this is a literal" }

"#;

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::Inline(
                                    ast::InlineExpression::StringLiteral {
                                        value: "this is a literal",
                                    }
                                )
                            },
                        ]
                    }),
                    attributes: vec![],
                    comment: None,
                }
            )
        ]
    }
);

Fields

value: S

NumberLiteral

A number literal.

Example

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

let ftl = r#"

key = { -0.5 }

"#;

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::Inline(
                                    ast::InlineExpression::NumberLiteral {
                                        value: "-0.5",
                                    }
                                )
                            },
                        ]
                    }),
                    attributes: vec![],
                    comment: None,
                }
            )
        ]
    }
);

Fields

value: S

FunctionReference

A function reference.

Example

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

let ftl = r#"

key = { FUNC() }

"#;

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::Inline(
                                    ast::InlineExpression::FunctionReference {
                                        id: ast::Identifier {
                                            name: "FUNC"
                                        },
                                        arguments: ast::CallArguments::default(),
                                    }
                                )
                            },
                        ]
                    }),
                    attributes: vec![],
                    comment: None,
                }
            )
        ]
    }
);

Fields

id: Identifier<S>

arguments: CallArguments<S>

MessageReference

A reference to another message.

Example

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

let ftl = r#"

key = { key2 }

"#;

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::Inline(
                                    ast::InlineExpression::MessageReference {
                                        id: ast::Identifier {
                                            name: "key2"
                                        },
                                        attribute: None,
                                    }
                                )
                            },
                        ]
                    }),
                    attributes: vec![],
                    comment: None,
                }
            )
        ]
    }
);

Fields

id: Identifier<S>

attribute: Option<Identifier<S>>

TermReference

A reference to a term.

Example

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

let ftl = r#"

key = { -brand-name }

"#;

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::Inline(
                                    ast::InlineExpression::TermReference {
                                        id: ast::Identifier {
                                            name: "brand-name"
                                        },
                                        attribute: None,
                                        arguments: None,
                                    }
                                )
                            },
                        ]
                    }),
                    attributes: vec![],
                    comment: None,
                }
            )
        ]
    }
);

Fields

id: Identifier<S>

attribute: Option<Identifier<S>>

arguments: Option<CallArguments<S>>

VariableReference

A reference to a variable.

Example

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

let ftl = r#"

key = { $var1 }

"#;

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::Inline(
                                    ast::InlineExpression::VariableReference {
                                        id: ast::Identifier {
                                            name: "var1"
                                        },
                                    }
                                )
                            },
                        ]
                    }),
                    attributes: vec![],
                    comment: None,
                }
            )
        ]
    }
);

Fields

id: Identifier<S>

Placeable

A placeable which may contain another expression.

Example

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

let ftl = r#"

key = { { "placeable" } }

"#;

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::Inline(
                                    ast::InlineExpression::Placeable {
                                        expression: Box::new(
                                            ast::Expression::Inline(
                                                ast::InlineExpression::StringLiteral {
                                                    value: "placeable"
                                                }
                                            )
                                        )
                                    }
                                )
                            },
                        ]
                    }),
                    attributes: vec![],
                    comment: None,
                }
            )
        ]
    }
);

Fields

expression: Box<Expression<S>>

Trait Implementations

impl<S: Clone> Clone for InlineExpression<S>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<S: Debug> Debug for InlineExpression<S>

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

Formats the value using the given formatter.

impl<S: PartialEq> PartialEq for InlineExpression<S>

fn eq(&self, other: &InlineExpression<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 InlineExpression<S>