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// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
use core::{
convert::TryFrom,
iter::FromIterator,
ops::{Range, RangeBounds, RangeFrom, RangeFull, RangeInclusive, RangeTo, RangeToInclusive},
};
use super::CodePointInversionListError;
use crate::codepointinvlist::utils::deconstruct_range;
use crate::codepointinvlist::{CodePointInversionList, CodePointInversionListBuilder};
use zerovec::ZeroVec;
fn try_from_range<'data>(
range: &impl RangeBounds<char>,
) -> Result<CodePointInversionList<'data>, CodePointInversionListError> {
let (from, till) = deconstruct_range(range);
if from < till {
let set = [from, till];
let inv_list: ZeroVec<u32> = ZeroVec::alloc_from_slice(&set);
#[allow(clippy::unwrap_used)] // valid
Ok(CodePointInversionList::try_from_inversion_list(inv_list).unwrap())
} else {
Err(CodePointInversionListError::InvalidRange(from, till))
}
}
impl<'data> TryFrom<&Range<char>> for CodePointInversionList<'data> {
type Error = CodePointInversionListError;
fn try_from(range: &Range<char>) -> Result<Self, Self::Error> {
try_from_range(range)
}
}
impl<'data> TryFrom<&RangeFrom<char>> for CodePointInversionList<'data> {
type Error = CodePointInversionListError;
fn try_from(range: &RangeFrom<char>) -> Result<Self, Self::Error> {
try_from_range(range)
}
}
impl<'data> TryFrom<&RangeFull> for CodePointInversionList<'data> {
type Error = CodePointInversionListError;
fn try_from(_: &RangeFull) -> Result<Self, Self::Error> {
Ok(Self::all())
}
}
impl<'data> TryFrom<&RangeInclusive<char>> for CodePointInversionList<'data> {
type Error = CodePointInversionListError;
fn try_from(range: &RangeInclusive<char>) -> Result<Self, Self::Error> {
try_from_range(range)
}
}
impl<'data> TryFrom<&RangeTo<char>> for CodePointInversionList<'data> {
type Error = CodePointInversionListError;
fn try_from(range: &RangeTo<char>) -> Result<Self, Self::Error> {
try_from_range(range)
}
}
impl<'data> TryFrom<&RangeToInclusive<char>> for CodePointInversionList<'data> {
type Error = CodePointInversionListError;
fn try_from(range: &RangeToInclusive<char>) -> Result<Self, Self::Error> {
try_from_range(range)
}
}
impl FromIterator<RangeInclusive<u32>> for CodePointInversionList<'_> {
fn from_iter<I: IntoIterator<Item = RangeInclusive<u32>>>(iter: I) -> Self {
let mut builder = CodePointInversionListBuilder::new();
for range in iter {
builder.add_range32(&range);
}
builder.build()
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::codepointinvlist::CodePointInversionList;
use core::{char, convert::TryFrom};
#[test]
fn test_try_from_range() {
let check: Vec<char> = CodePointInversionList::try_from(&('A'..'B'))
.unwrap()
.iter_chars()
.collect();
assert_eq!(vec!['A'], check);
}
#[test]
fn test_try_from_range_error() {
let check = CodePointInversionList::try_from(&('A'..'A'));
assert!(matches!(
check,
Err(CodePointInversionListError::InvalidRange(65, 65))
));
}
#[test]
fn test_try_from_range_inclusive() {
let check: Vec<char> = CodePointInversionList::try_from(&('A'..='A'))
.unwrap()
.iter_chars()
.collect();
assert_eq!(vec!['A'], check);
}
#[test]
fn test_try_from_range_inclusive_err() {
let check = CodePointInversionList::try_from(&('B'..'A'));
assert!(matches!(
check,
Err(CodePointInversionListError::InvalidRange(66, 65))
));
}
#[test]
fn test_try_from_range_from() {
let uset = CodePointInversionList::try_from(&('A'..)).unwrap();
let check: usize = uset.size();
let expected: usize = (char::MAX as usize) + 1 - 65;
assert_eq!(expected, check);
}
#[test]
fn test_try_from_range_to() {
let uset = CodePointInversionList::try_from(&(..'A')).unwrap();
let check: usize = uset.size();
let expected: usize = 65;
assert_eq!(expected, check);
}
#[test]
fn test_try_from_range_to_err() {
let check = CodePointInversionList::try_from(&(..(0x0 as char)));
assert!(matches!(
check,
Err(CodePointInversionListError::InvalidRange(0, 0))
));
}
#[test]
fn test_try_from_range_to_inclusive() {
let uset = CodePointInversionList::try_from(&(..='A')).unwrap();
let check: usize = uset.size();
let expected: usize = 66;
assert_eq!(expected, check);
}
#[test]
fn test_try_from_range_full() {
let uset = CodePointInversionList::try_from(&(..)).unwrap();
let check: usize = uset.size();
let expected: usize = (char::MAX as usize) + 1;
assert_eq!(expected, check);
}
#[test]
fn test_from_range_iterator() {
let ranges = [
RangeInclusive::new(0, 0x3FFF),
RangeInclusive::new(0x4000, 0x7FFF),
RangeInclusive::new(0x8000, 0xBFFF),
RangeInclusive::new(0xC000, 0xFFFF),
];
let expected =
CodePointInversionList::try_from_inversion_list_slice(&[0x0, 0x1_0000]).unwrap();
let actual = CodePointInversionList::from_iter(ranges);
assert_eq!(expected, actual);
}
}