#
# assert " \n\thello \n\t".l_trim == "hello \n\t"
#
- # A whitespace is defined as any character which ascii value is less than or equal to 32
+ # `Char::is_whitespace` determines what is a whitespace.
fun l_trim: SELFTYPE
do
var iter = self.chars.iterator
while iter.is_ok do
- if iter.item.ascii > 32 then break
+ if not iter.item.is_whitespace then break
iter.next
end
if iter.index == length then return self.empty
#
# assert " \n\thello \n\t".r_trim == " \n\thello"
#
- # A whitespace is defined as any character which ascii value is less than or equal to 32
+ # `Char::is_whitespace` determines what is a whitespace.
fun r_trim: SELFTYPE
do
var iter = self.chars.reverse_iterator
while iter.is_ok do
- if iter.item.ascii > 32 then break
+ if not iter.item.is_whitespace then break
iter.next
end
if iter.index < 0 then return self.empty
end
# Trims trailing and preceding white spaces
- # A whitespace is defined as any character which ascii value is less than or equal to 32
#
# assert " Hello World ! ".trim == "Hello World !"
# assert "\na\nb\tc\t".trim == "a\nb\tc"
+ #
+ # `Char::is_whitespace` determines what is a whitespace.
fun trim: SELFTYPE do return (self.l_trim).r_trim
+ # Is the string non-empty but only made of whitespaces?
+ #
+ # assert " \n\t ".is_whitespace == true
+ # assert " hello ".is_whitespace == false
+ # assert "".is_whitespace == false
+ #
+ # `Char::is_whitespace` determines what is a whitespace.
+ fun is_whitespace: Bool
+ do
+ if is_empty then return false
+ for c in self.chars do
+ if not c.is_whitespace then return false
+ end
+ return true
+ end
+
# Returns `self` removed from its last line terminator (if any).
#
# assert "Hello\n".chomp == "Hello"
# assert "\r\n\r\n".chomp == "\r\n"
# assert "\r\n\r".chomp == "\r\n"
#
- # Note: unlike with most IO methods like `IStream::read_line`,
+ # Note: unlike with most IO methods like `Reader::read_line`,
# a single `\r` is considered here to be a line terminator and will be removed.
fun chomp: SELFTYPE
do
# Indes in _items of the last item of the string
private var index_to: Int is noinit
- redef var chars: SequenceRead[Char] = new FlatStringCharView(self)
+ redef var chars: SequenceRead[Char] = new FlatStringCharView(self) is lazy
redef fun [](index)
do
# String Specific Methods #
##################################################
- private init with_infos(items: NativeString, len: Int, from: Int, to: Int)
+ # Low-level creation of a new string with given data.
+ #
+ # `items` will be used as is, without copy, to retrieve the characters of the string.
+ # Aliasing issues is the responsibility of the caller.
+ private init with_infos(items: NativeString, length: Int, from: Int, to: Int)
do
self.items = items
- length = len
+ self.length = length
index_from = from
index_to = to
end
super FlatText
super Buffer
- redef var chars: Sequence[Char] = new FlatBufferCharView(self)
+ redef var chars: Sequence[Char] = new FlatBufferCharView(self) is lazy
private var capacity: Int = 0
# Create a new empty string.
init do end
+ # Low-level creation a new buffer with given data.
+ #
+ # `items` will be used as is, without copy, to store the characters of the buffer.
+ # Aliasing issues is the responsibility of the caller.
+ #
+ # If `items` is shared, `written` should be set to true after the creation
+ # so that a modification will do a copy-on-write.
+ private init with_infos(items: NativeString, capacity, length: Int)
+ do
+ self.items = items
+ self.length = length
+ self.capacity = capacity
+ end
+
# Create a new string copied from `s`.
init from(s: Text)
do
init with_capacity(cap: Int)
do
assert cap >= 0
- # _items = new NativeString.calloc(cap)
items = new NativeString(cap+1)
capacity = cap
length = 0
if from < 0 then from = 0
if count > length then count = length
if from < count then
- var r = new FlatBuffer.with_capacity(count - from)
- while from < count do
- r.chars.push(items[from])
- from += 1
- end
+ var len = count - from
+ var r_items = new NativeString(len)
+ items.copy_to(r_items, len, from, 0)
+ var r = new FlatBuffer.with_infos(r_items, len, len)
return r
else
return new FlatBuffer
nitlanguage / nit.git / blobdiff