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mod accepted;
mod removed;
mod active;
mod builtin_attrs;
mod check;
use std::fmt;
use crate::{edition::Edition, symbol::Symbol};
use syntax_pos::Span;
#[derive(Clone, Copy)]
pub enum State {
Accepted,
Active { set: fn(&mut Features, Span) },
Removed { reason: Option<&'static str> },
Stabilized { reason: Option<&'static str> },
}
impl fmt::Debug for State {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
State::Accepted { .. } => write!(f, "accepted"),
State::Active { .. } => write!(f, "active"),
State::Removed { .. } => write!(f, "removed"),
State::Stabilized { .. } => write!(f, "stabilized"),
}
}
}
#[derive(Debug, Clone)]
pub struct Feature {
state: State,
name: Symbol,
since: &'static str,
issue: Option<u32>,
edition: Option<Edition>,
description: &'static str,
}
pub use active::{Features, INCOMPLETE_FEATURES};
pub use builtin_attrs::{
AttributeGate, AttributeType, GatedCfg,
BuiltinAttribute, BUILTIN_ATTRIBUTES, BUILTIN_ATTRIBUTE_MAP,
deprecated_attributes, is_builtin_attr, is_builtin_attr_name,
};
pub use check::{
check_attribute, check_crate, get_features, feature_err, emit_feature_err,
Stability, GateIssue, UnstableFeatures,
EXPLAIN_STMT_ATTR_SYNTAX, EXPLAIN_UNSIZED_TUPLE_COERCION,
};