Enum Unit 

pub enum Unit {
    Symbol(Box<str>, Span),
    Parser(Parser),
}

Some unit, which represents an intermediate state.

Variants

Symbol(Box<str>, Span)

The current unit is a single symbol.

Parser(Parser)

The current unit is a parser, which can yield multiple units.

Implementations

impl Unit

pub const fn span(&self) -> Span

Returns the source span of this unit.

pub fn symbol(self) -> Result<Box<str>>

Returns the symbol, if applicable, as a result type.

Errors

Returns an error if this unit is a parser (a sublist), not a symbol.

pub fn parser(self) -> Result<Parser>

Returns the parser, if applicable, as a result type.

Errors

Returns an error if this unit is a symbol, not a parser.

pub fn substitute(&mut self, variable: &str, value: &str)

Replaces all occurrences of a symbol with another symbol, recursively.

Trait Implementations

impl Clone for Unit

fn clone(&self) -> Unit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<C: Context> Parsable<C> for Unit

fn parse_symbol(name: Box<str>, span: Span, _context: &C) -> Result<Self>

When a symbol is found by the parser, this will be called.

fn parse_list(parser: &mut Parser, _context: &C) -> Result<Self>

When a subparser is found by the parser, this will be called.