pub enum Substitution {
    BackReference(usize),
    WellKnown(WellKnownComponent),
}
Expand description

The <substitution> form: a back-reference to some component we’ve already parsed.

<substitution> ::= S <seq-id> _
               ::= S_
               ::= St # ::std::
               ::= Sa # ::std::allocator
               ::= Sb # ::std::basic_string
               ::= Ss # ::std::basic_string < char,
                                              ::std::char_traits<char>,
                                              ::std::allocator<char> >
               ::= Si # ::std::basic_istream<char,  std::char_traits<char> >
               ::= So # ::std::basic_ostream<char,  std::char_traits<char> >
               ::= Sd # ::std::basic_iostream<char, std::char_traits<char> >

Variants§

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BackReference(usize)

A reference to an entity that already occurred, ie the S_ and S <seq-id> _ forms.

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WellKnown(WellKnownComponent)

A well-known substitution component. These are the components that do not appear in the substitution table, but have abbreviations specified directly in the grammar.

Trait Implementations§

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.