Enum syntax::parse::parser::PathStyle [−][src]
pub enum PathStyle { Expr, Type, Mod, }
How to parse a path.
Variants
Expr
In some contexts, notably in expressions, paths with generic arguments are ambiguous
with something else. For example, in expressions segment < ....
can be interpreted
as a comparison and segment ( ....
can be interpreted as a function call.
In all such contexts the non-path interpretation is preferred by default for practical
reasons, but the path interpretation can be forced by the disambiguator ::
, e.g.
x<y>
- comparisons, x::<y>
- unambiguously a path.
Type
In other contexts, notably in types, no ambiguity exists and paths can be written
without the disambiguator, e.g. x<y>
- unambiguously a path.
Paths with disambiguators are still accepted, x::<Y>
- unambiguously a path too.
Mod
A path with generic arguments disallowed, e.g. foo::bar::Baz
, used in imports,
visibilities or attributes.
Technically, this variant is unnecessary and e.g. Expr
can be used instead
(paths in "mod" contexts have to be checked later for absence of generic arguments
anyway, due to macros), but it is used to avoid weird suggestions about expected
tokens when something goes wrong.
Trait Implementations
impl Copy for PathStyle
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impl Copy for PathStyle
impl Clone for PathStyle
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impl Clone for PathStyle
fn clone(&self) -> PathStyle
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fn clone(&self) -> PathStyle
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl PartialEq for PathStyle
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impl PartialEq for PathStyle