Enum syntax::parse::parser::PathStyle

pub enum PathStyle {
    Expr,
    Type,
    Mod,
}

🔬 This is a nightly-only experimental API. (rustc_private)

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How to parse a path.

Variants

Expr

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

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

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

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

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

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

impl Clone for PathStyle

fn clone(&self) -> PathStyle

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for PathStyle

fn eq(&self, __arg_0: &PathStyle) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.