Struct TraitConst 

struct TraitConst {
    ident: Ident,
    ty: Type,
}

Parsed associated constant from a trait impl block.

Trait constants are exposed to R as zero-argument .Call() wrappers that simply return the constant value.

Fields

ident: Ident

Constant identifier (e.g., MAX_SIZE).

ty: Type

Constant type (e.g., i32, &str). Used to determine SEXP conversion.

Implementations

impl TraitConst

fn c_wrapper_ident(&self, type_ident: &Ident, trait_name: &Ident) -> Ident

Generates the C wrapper function identifier: C_{Type}__{Trait}__{CONST}.

This is the symbol name registered with R for .Call() access to the constant.

fn c_wrapper_ident_string( &self, type_ident: &Ident, trait_name: &Ident, ) -> String

Generates the C wrapper identifier as a String, for use in R-side .Call() generation.

fn call_method_def_ident(&self, type_ident: &Ident, trait_name: &Ident) -> Ident

Generates the R_CallMethodDef static identifier: call_method_def_{Type}__{Trait}_{CONST}.

Trait Implementations

impl Debug for TraitConst

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

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: 352 bytes