Enum texlang::variable::IndexResolver

pub enum IndexResolver<S> {
    Static(Index),
    Dynamic(fn(_: Token, _: &mut ExpandedStream<S>) -> Result<Index, Box<Error>>),
}

Specification for how the index of an array variable is determined.

Obtaining a variable from a command involves determining the variable’s Index. This index is ultimately passed into the variable’s getters to get a reference or mutable reference to the underlying Rust value.

Variants

Static(Index)

A static index, provided in the enum variant.

This resolver is used for commands that point to a specific entry in a array. For example, after executing \countdef\A 30, the \A control sequence points at the count register with index 30. The command backing \A uses a static resolver with index 30.

Dynamic(fn(_: Token, _: &mut ExpandedStream<S>) -> Result<Index, Box<Error>>)

A dynamic index that is determined by reading the input token stream.

For example, in \count 4 the index of 4 is determined by parsing a number from the input token stream.