/**
* Returns a stream of code point values (as {@code Integer} objects) from this sequence. Any
* surrogate pairs encountered in the sequence are combined as if by {@linkplain
* Character#toCodePoint Character.toCodePoint} and the result is passed to the stream. Any other
* code units, including ordinary BMP characters, unpaired surrogates, and undefined code units,
* are zero-extended to @{code int} values which are then passed to the stream.
*
* <p>If the sequence is mutated while the stream is being read, the result is undefined.
*
* @return an Iterable of Unicode code points from this sequence
*/
public default IntStream codePoints() {
class CodePointIterator implements IntStream.IntIterator {
int cur = 0;
@Override
public void forEachInt(IntConsumer block) {
while (cur < length()) {
int cp = Character.codePointAt(CharSequence.this, cur);
cur += Character.charCount(cp);
block.accept(cp);
}
}
public boolean hasNext() {
return cur < length();
}
public int nextInt() {
if (!hasNext()) throw new NoSuchElementException();
// TODO: It probably would be faster if the logic from
// the following two methods were inlined and simplified.
int cp = Character.codePointAt(CharSequence.this, cur);
cur += Character.charCount(cp);
return cp;
}
}
return Streams.intStream(
() -> Streams.intSpliteratorUnknownSize(new CodePointIterator(), Spliterator.ORDERED),
Spliterator.UNIFORM | Spliterator.SIZED | Spliterator.ORDERED);
}
/**
* Returns a stream of char values from this sequence. If the sequence is mutated while the stream
* is being read, the result is undefined.
*
* @return an Iterable of Character values from this sequence
*/
public default IntStream chars() {
class CharIterator implements IntStream.IntIterator {
int cur = 0;
public boolean hasNext() {
return cur < length();
}
public int nextInt() {
if (hasNext()) return charAt(cur++);
else throw new NoSuchElementException();
}
@Override
public void forEachInt(IntConsumer block) {
for (; cur < length(); cur++) block.accept(charAt(cur));
}
}
return Streams.intStream(
() -> Streams.intSpliterator(new CharIterator(), length(), Spliterator.ORDERED),
Spliterator.UNIFORM | Spliterator.SIZED | Spliterator.ORDERED);
}