Enum syntex_syntax::ext::base::SyntaxExtension [−] [src]

pub enum SyntaxExtension {
    MultiDecorator(Box<MultiItemDecorator + 'static>),
    MultiModifier(Box<MultiItemModifier + 'static>),
    NormalTT(Box<TTMacroExpander + 'static>, Option<Span>, bool),
    IdentTT(Box<IdentMacroExpander + 'static>, Option<Span>, bool),
    MacroRulesTT,
}

An enum representing the different kinds of syntax extensions.

Variants

`MultiDecorator`	A syntax extension that is attached to an item and creates new items based upon it. `#[derive(...)]` is a `MultiItemDecorator`.
`MultiModifier`	A syntax extension that is attached to an item and modifies it in-place. More flexible version than Modifier.
`NormalTT`	A normal, function-like syntax extension. `bytes!` is a `NormalTT`. The `bool` dictates whether the contents of the macro can directly use `#[unstable]` things (true == yes).
`IdentTT`	A function-like syntax extension that has an extra ident before the block.
`MacroRulesTT`	Represents `macro_rules!` itself.