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parse_unstability

rustc_attr_parsing::attributes::stability

Function parse_unstability 

Source 
pub(crate) fn parse_unstability<S: Stage>(
    cx: &mut AcceptContext<'_, '_, S>,
    args: &ArgParser,
) -> Option<(Symbol, StabilityLevel)>
Expand description

Read the content of a unstable/rustc_const_unstable/rustc_default_body_unstable attribute, and return the feature name and its stability information.