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Use autocfg instead of version_check #40

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Use autocfg instead of version_check #40

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889d476
Use autocfg instead of version_check
kjeremy Nov 13, 2019
3954276
Probe for explicit features
kjeremy Nov 13, 2019
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20 changes: 6 additions & 14 deletions build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,19 +5,11 @@ fn main() {

let ac = autocfg::new();

if ac.probe_rustc_version(1, 5) {
autocfg::emit("__unicase__iter_cmp");
}
ac.emit_has_path("core::iter::Iterator::cmp");
ac.emit_has_type("std::collections::hash_map::DefaultHasher");

if ac.probe_rustc_version(1, 13) {
autocfg::emit("__unicase__default_hasher");
}
// For `const fn` support
ac.emit_rustc_version(1, 31);

if ac.probe_rustc_version(1, 31) {
autocfg::emit("__unicase__const_fns");
}

if ac.probe_rustc_version(1, 36) {
autocfg::emit("__unicase__core_and_alloc");
}
}
ac.emit_sysroot_crate("alloc");
}
20 changes: 10 additions & 10 deletions src/ascii.rs
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Original file line number Diff line number Diff line change
@@ -1,19 +1,19 @@
use alloc::string::String;
#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
use core::cmp::Ordering;
use core::fmt;
use core::hash::{Hash, Hasher};
use core::ops::{Deref, DerefMut};
use core::str::FromStr;
#[cfg(not(__unicase__core_and_alloc))]
#[cfg(not(has_alloc))]
#[allow(deprecated, unused)]
use std::ascii::AsciiExt;

use super::{Ascii, Encoding, UniCase};

impl<S> Ascii<S> {
#[inline]
#[cfg(__unicase__const_fns)]
#[cfg(rustc_1_31)]
pub const fn new(s: S) -> Ascii<S> {
Ascii(s)
}
Expand All @@ -22,7 +22,7 @@ impl<S> Ascii<S> {
///
/// For Rust versions >= 1.31, this is a `const fn`.
#[inline]
#[cfg(not(__unicase__const_fns))]
#[cfg(not(rustc_1_31))]
pub fn new(s: S) -> Ascii<S> {
Ascii(s)
}
Expand Down Expand Up @@ -58,15 +58,15 @@ impl<S> DerefMut for Ascii<S> {
}
}

#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
impl<T: AsRef<str>> PartialOrd for Ascii<T> {
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}

#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
impl<T: AsRef<str>> Ord for Ascii<T> {
#[inline]
fn cmp(&self, other: &Self) -> Ordering {
Expand Down Expand Up @@ -134,9 +134,9 @@ impl<S: AsRef<str>> Hash for Ascii<S> {
mod tests {
use ::Ascii;
use std::hash::{Hash, Hasher};
#[cfg(not(__unicase__default_hasher))]
#[cfg(not(has_std__collections__hash_map__DefaultHasher))]
use std::hash::SipHasher as DefaultHasher;
#[cfg(__unicase__default_hasher)]
#[cfg(has_std__collections__hash_map__DefaultHasher)]
use std::collections::hash_map::DefaultHasher;

fn hash<T: Hash>(t: &T) -> u64 {
Expand Down Expand Up @@ -166,7 +166,7 @@ mod tests {
b.iter(|| assert_eq!(Ascii("foobar"), Ascii("FOOBAR")));
}

#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
#[test]
fn test_case_cmp() {
assert!(Ascii("foobar") == Ascii("FOOBAR"));
Expand All @@ -179,7 +179,7 @@ mod tests {
assert!(Ascii("a") < Ascii("AA"));
}

#[cfg(__unicase__const_fns)]
#[cfg(rustc_1_31)]
#[test]
fn test_ascii_new_const() {
const _ASCII: Ascii<&'static str> = Ascii::new("");
Expand Down
34 changes: 17 additions & 17 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
#![cfg_attr(feature = "nightly", feature(test))]
#![cfg_attr(
all(
__unicase__core_and_alloc,
has_alloc,
not(test),
),
no_std,
Expand Down Expand Up @@ -52,18 +52,18 @@
#[cfg(feature = "nightly")]
extern crate test;

#[cfg(all(__unicase__core_and_alloc, not(test)))]
#[cfg(all(has_alloc, not(test)))]
extern crate alloc;
#[cfg(all(__unicase__core_and_alloc, not(test)))]
#[cfg(all(has_alloc, not(test)))]
use alloc::string::String;

#[cfg(not(all(__unicase__core_and_alloc, not(test))))]
#[cfg(not(all(has_alloc, not(test))))]
extern crate std as alloc;
#[cfg(not(all(__unicase__core_and_alloc, not(test))))]
#[cfg(not(all(has_alloc, not(test))))]
extern crate std as core;

use alloc::borrow::Cow;
#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
use core::cmp::Ordering;
use core::fmt;
use core::hash::{Hash, Hasher};
Expand Down Expand Up @@ -135,7 +135,7 @@ impl<S: AsRef<str>> UniCase<S> {
///
/// Note: This scans the text to determine if it is all ASCII or not.
pub fn new(s: S) -> UniCase<S> {
#[cfg(not(__unicase__core_and_alloc))]
#[cfg(not(has_alloc))]
#[allow(deprecated, unused)]
use std::ascii::AsciiExt;

Expand All @@ -149,29 +149,29 @@ impl<S: AsRef<str>> UniCase<S> {

impl<S> UniCase<S> {
/// Creates a new `UniCase`, skipping the ASCII check.
#[cfg(__unicase__const_fns)]
#[cfg(rustc_1_31)]
pub const fn unicode(s: S) -> UniCase<S> {
UniCase(Encoding::Unicode(Unicode(s)))
}

/// Creates a new `UniCase`, skipping the ASCII check.
///
/// For Rust versions >= 1.31, this is a `const fn`.
#[cfg(not(__unicase__const_fns))]
#[cfg(not(rustc_1_31))]
pub fn unicode(s: S) -> UniCase<S> {
UniCase(Encoding::Unicode(Unicode(s)))
}

/// Creates a new `UniCase` which performs only ASCII case folding.
#[cfg(__unicase__const_fns)]
#[cfg(rustc_1_31)]
pub const fn ascii(s: S) -> UniCase<S> {
UniCase(Encoding::Ascii(Ascii(s)))
}

/// Creates a new `UniCase` which performs only ASCII case folding.
///
/// For Rust versions >= 1.31, this is a `const fn`.
#[cfg(not(__unicase__const_fns))]
#[cfg(not(rustc_1_31))]
pub fn ascii(s: S) -> UniCase<S> {
UniCase(Encoding::Ascii(Ascii(s)))
}
Expand Down Expand Up @@ -299,15 +299,15 @@ into_impl!(&'a str);
into_impl!(String);
into_impl!(Cow<'a, str>);

#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
impl<T: AsRef<str>> PartialOrd for UniCase<T> {
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}

#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
impl<T: AsRef<str>> Ord for UniCase<T> {
#[inline]
fn cmp(&self, other: &Self) -> Ordering {
Expand All @@ -333,9 +333,9 @@ impl<S: FromStr + AsRef<str>> FromStr for UniCase<S> {
mod tests {
use super::UniCase;
use std::hash::{Hash, Hasher};
#[cfg(not(__unicase__default_hasher))]
#[cfg(not(has_std__collections__hash_map__DefaultHasher))]
use std::hash::SipHasher as DefaultHasher;
#[cfg(__unicase__default_hasher)]
#[cfg(has_std__collections__hash_map__DefaultHasher)]
use std::collections::hash_map::DefaultHasher;

fn hash<T: Hash>(t: &T) -> u64 {
Expand Down Expand Up @@ -422,7 +422,7 @@ mod tests {
b.iter(|| assert!(::std::str::from_utf8(SUBJECT).is_ok()));
}

#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
#[test]
fn test_case_cmp() {
assert!(UniCase::new("a") < UniCase::new("B"));
Expand Down Expand Up @@ -457,7 +457,7 @@ mod tests {
let _: &str = owned.as_ref();
}

#[cfg(__unicase__const_fns)]
#[cfg(rustc_1_31)]
#[test]
fn test_unicase_unicode_const() {
const _UNICASE: UniCase<&'static str> = UniCase::unicode("");
Expand Down
6 changes: 3 additions & 3 deletions src/unicode/mod.rs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
use core::cmp::Ordering;
use core::hash::{Hash, Hasher};

Expand Down Expand Up @@ -35,15 +35,15 @@ impl<S1: AsRef<str>, S2: AsRef<str>> PartialEq<Unicode<S2>> for Unicode<S1> {

impl<S: AsRef<str>> Eq for Unicode<S> {}

#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
impl<T: AsRef<str>> PartialOrd for Unicode<T> {
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}

#[cfg(__unicase__iter_cmp)]
#[cfg(has_core__iter__Iterator__cmp)]
impl<T: AsRef<str>> Ord for Unicode<T> {
#[inline]
fn cmp(&self, other: &Self) -> Ordering {
Expand Down