<commit_before>// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

//! Feature gating
//!
//! This module implements the gating necessary for preventing certain compiler
//! features from being used by default. This module will crawl a pre-expanded
//! AST to ensure that there are no features which are used that are not
//! enabled.
//!
//! Features are enabled in programs via the crate-level attributes of
//! `#![feature(...)]` with a comma-separated list of features.
//!
//! For the purpose of future feature-tracking, once code for detection of feature
//! gate usage is added, *do not remove it again* even once the feature
//! becomes stable.

use self::Status::*;
use self::AttributeType::*;
use self::AttributeGate::*;

use abi::Abi;
use ast::{NodeId, PatKind};
use ast;
use attr;
use attr::AttrMetaMethods;
use codemap::{CodeMap, Span};
use errors::Handler;
use visit;
use visit::{FnKind, Visitor};
use parse::token::InternedString;

use std::ascii::AsciiExt;
use std::cmp;

// If you change this list without updating src/doc/reference.md, @cmr will be sad
// Don't ever remove anything from this list; set them to 'Removed'.
// The version numbers here correspond to the version in which the current status
// was set. This is most important for knowing when a particular feature became
// stable (active).
// NB: The featureck.py script parses this information directly out of the source
// so take care when modifying it.
const KNOWN_FEATURES: &'static [(&'static str, &'static str, Option<u32>, Status)] = &[
    ("globs", "1.0.0", None, Accepted),
    ("macro_rules", "1.0.0", None, Accepted),
    ("struct_variant", "1.0.0", None, Accepted),
    ("asm", "1.0.0", Some(29722), Active),
    ("managed_boxes", "1.0.0", None, Removed),
    ("non_ascii_idents", "1.0.0", Some(28979), Active),
    ("thread_local", "1.0.0", Some(29594), Active),
    ("link_args", "1.0.0", Some(29596), Active),
    ("plugin_registrar", "1.0.0", Some(29597), Active),
    ("log_syntax", "1.0.0", Some(29598), Active),
    ("trace_macros", "1.0.0", Some(29598), Active),<commit_msg>Rollup merge of #32929 - LeoTestard:featureck-comment, r=GuillaumeGomez<commit_after>// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

//! Feature gating
//!
//! This module implements the gating necessary for preventing certain compiler
//! features from being used by default. This module will crawl a pre-expanded
//! AST to ensure that there are no features which are used that are not
//! enabled.
//!
//! Features are enabled in programs via the crate-level attributes of
//! `#![feature(...)]` with a comma-separated list of features.
//!
//! For the purpose of future feature-tracking, once code for detection of feature
//! gate usage is added, *do not remove it again* even once the feature
//! becomes stable.

use self::Status::*;
use self::AttributeType::*;
use self::AttributeGate::*;

use abi::Abi;
use ast::{NodeId, PatKind};
use ast;
use attr;
use attr::AttrMetaMethods;
use codemap::{CodeMap, Span};
use errors::Handler;
use visit;
use visit::{FnKind, Visitor};
use parse::token::InternedString;

use std::ascii::AsciiExt;
use std::cmp;

// If you change this list without updating src/doc/reference.md, @cmr will be sad
// Don't ever remove anything from this list; set them to 'Removed'.
// The version numbers here correspond to the version in which the current status
// was set. This is most important for knowing when a particular feature became
// stable (active).
// NB: The tidy tool parses this information directly out of the source so take
// care when modifying it.
const KNOWN_FEATURES: &'static [(&'static str, &'static str, Option<u32>, Status)] = &[
    ("globs", "1.0.0", None, Accepted),
    ("macro_rules", "1.0.0", None, Accepted),
    ("struct_variant", "1.0.0", None, Accepted),
    ("asm", "1.0.0", Some(29722), Active),
    ("managed_boxes", "1.0.0", None, Removed),
    ("non_ascii_idents", "1.0.0", Some(28979), Active),
    ("thread_local", "1.0.0", Some(29594), Active),
    ("link_args", "1.0.0", Some(29596), Active),
    ("plugin_registrar", "1.0.0", Some(29597), Active),
    ("log_syntax", "1.0.0", Some(29598), Active),
    ("trace_macros", "1.0.0", Some(29598), Active),
{'fraction_non_alphanumeric': 0.15077473182359952, 'fraction_numerical': 0.031982518871672624, 'mean_word_length': 4.035, 'pattern_counts': {'":': 0, '<': 9, '<?xml version=': 0, '>': 9, 'https://': 0, 'lorem ipsum': 0, 'www.': 2, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 2, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '5370083', 'n_tokens_mistral': 1634, 'n_tokens_neox': 1532, 'n_words': 590}