abstract class AbstractArrayRead[E]
super SequenceRead[E]
- var _length: Int = 0
- redef fun length do return _length
+ redef var length = 0
redef fun is_empty do return _length == 0
self[pos] = item
end
+ redef fun insert_all(coll, pos)
+ do
+ var l = coll.length
+ if l == 0 then return
+ enlarge(length + l)
+ _length += l
+ copy_to(pos, length-pos-l, self, pos + l)
+ for c in coll do
+ self[pos] = c
+ pos += 1
+ end
+ end
+
redef fun add(item) do self[length] = item
redef fun clear do _length = 0
end
# The internal storage.
- var _items: nullable NativeArray[E] = null
+ private var items: nullable NativeArray[E] = null
# Do not use this method
# FIXME: Remove it once modules can intrude non local modules
fun intern_items: NativeArray[E] do return _items.as(not null)
# The size of `_items`.
- var _capacity: Int = 0
+ private var capacity: Int = 0
+
+ redef fun ==(o)
+ do
+ if not o isa Array[nullable Object] then return super
+ # Efficient implementation
+ var l = length
+ if l != o.length then return false
+ var i = 0
+ var it = _items
+ var oit = o._items
+ while i < l do
+ if it[i] != oit[i] then return false
+ i += 1
+ end
+ return true
+ end
+
+ # Concatenation of arrays.
+ #
+ # Returns a new array built by concatenating `self` and `other` together.
+ #
+ # var a1 = [1,2,3]
+ # var a2 = [4,5,6]
+ # var a3 = a1 + a2
+ # assert a3 == [1,2,3,4,5,6]
+ #
+ # Because a new array is always created, future modification on `self` and `other`
+ # does not impact the previously computed result.
+ #
+ # a1.add(30)
+ # a2.add(60)
+ # assert a3 == [1,2,3,4,5,6] # unchanged
+ # assert a1 + a2 == [1,2,3,30,4,5,6,60]
+ fun +(other: Array[E]): Array[E]
+ do
+ var res = new Array[E].with_capacity(length + other.length)
+ res.append(self)
+ res.append(other)
+ return res
+ end
end
# An `Iterator` on `AbstractArray`
_index = 0
end
- var _index: Int = 0
- redef fun index do return _index
- var _array: AbstractArrayRead[E]
+ redef var index = 0
+
+ private var array: AbstractArrayRead[E]
end
private class ArrayReverseIterator[E]
super Set[E]
# The stored elements.
- var _array: Array[E]
+ private var array: Array[E] is noinit
redef fun has(e) do return _array.has(e)
init(iter: ArrayIterator[E]) do _iter = iter
- var _iter: ArrayIterator[E]
+ private var iter: ArrayIterator[E]
end
end
# Internal storage.
- var _items: Array[Couple[K,E]]
+ private var items = new Array[Couple[K,E]]
# fast remove the ith element of the array
private fun remove_at_index(i: Int)
end
# The last positive result given by a index(1) call
- var _last_index: Int = 0
+ private var last_index: Int = 0
# Where is the `key` in `_item`?
# return -1 if not found
end
return -1
end
-
- # A new empty map.
- init
- do
- _items = new Array[Couple[K,E]]
- end
end
private class ArrayMapKeys[K: Object, E]
end
end
+# Comparable array for comparable elements.
+#
+# For two arrays, if one is a prefix, then it is lower.
+#
+# ~~~
+# var a12 = new ArrayCmp[nullable Int].with_items(1,2)
+# var a123 = new ArrayCmp[nullable Int].with_items(1,2,3)
+# assert a12 < a123
+# ~~~
+#
+# Otherwise, the first element just after the longest
+# common prefix gives the order between the two arrays.
+#
+# ~~~
+# var a124 = new ArrayCmp[nullable Int].with_items(1,2,4)
+# var a13 = new ArrayCmp[nullable Int].with_items(1,3)
+# assert a12 < a123
+# assert a123 < a13
+# ~~~
+#
+# Obviously, two equal arrays are equal.
+#
+# ~~~
+# var b12 = new ArrayCmp[nullable Int].with_items(1,2)
+# assert (a12 <=> b12) == 0
+# ~~~
+#
+# `null` is considered lower than any other elements.
+# But is still greater than no element.
+#
+# ~~~
+# var a12n = new ArrayCmp[nullable Int].with_items(1,2,null)
+# assert a12n < a123
+# assert a12 < a12n
+# ~~~
+class ArrayCmp[E: nullable Comparable]
+ super Array[E]
+ super Comparable
+ redef type OTHER: ArrayCmp[E] is fixed
+
+ redef fun <(o) do return (self <=> o) < 0
+
+ redef fun <=>(o)
+ do
+ var it = _items
+ var oit = o._items
+ var i = 0
+ var l = length
+ var ol = o.length
+ var len
+ if l < ol then len = l else len = ol
+ while i < len do
+ var a = it[i]
+ var b = oit[i]
+ if a != null then
+ if b == null then return 1
+ var d = a <=> b.as(Comparable)
+ if d != 0 then return d
+ else
+ if b != null then return -1
+ end
+ i += 1
+ end
+ return l <=> ol
+ end
+end
# Others tools ################################################################
# Access are unchecked and it has a fixed size
# Not for public use: may become private.
universal NativeArray[E]
+ # Creates a new NativeArray of capacity `length`
+ new(length: Int) is intern
# The length of the array
fun length: Int is intern
# Use `self` to initialize a standard Nit Array.
nitlanguage / nit.git / blobdiff