Enum rustc_parse::parser::path::PathStyle[][src]

pub enum PathStyle {
    Expr,
    Type,
    Mod,
}
Expand description

Specifies 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

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

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

This method tests for !=.

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

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

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

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.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 1 byte

Size for each variant:

  • Expr: 0 bytes
  • Type: 0 bytes
  • Mod: 0 bytes