Struct PerParamMiniextendrAttr 

pub(crate) struct PerParamMiniextendrAttr {
    pub has_coerce: bool,
    pub has_match_arg: bool,
    pub default_value: Option<(String, Span)>,
    pub choices: Option<Vec<String>>,
    pub has_several_ok: bool,
}

Parsed per-parameter #[miniextendr(...)] attribute content.

A single attribute can contain multiple items, e.g. #[miniextendr(match_arg, default = "Safe")].

Fields

has_coerce: bool

Whether coerce was present, enabling automatic type coercion for this parameter (e.g., i32 to u16, f64 to f32).

has_match_arg: bool

Whether match_arg was present, generating R match.arg() validation for string parameters against a set of allowed values.

default_value: Option<(String, Span)>

Default value from default = "...", if present. The tuple contains the default value string and the attribute span (for error reporting).

choices: Option<Vec<String>>

Choices for string parameters: #[miniextendr(choices("a", "b", "c"))].

has_several_ok: bool

Whether several_ok was present, enabling multi-value match.arg(several.ok = TRUE). Only valid with choices(...) or match_arg.

Trait Implementations

impl Default for PerParamMiniextendrAttr

fn default() -> PerParamMiniextendrAttr

Returns the “default value” for a type.

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: 72 bytes