-
Notifications
You must be signed in to change notification settings - Fork 148
/
deque.jl
198 lines (174 loc) · 5.24 KB
/
deque.jl
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
"""
push(vec::StaticVector, item)
Return a new `StaticVector` with `item` inserted on the end of `vec`.
# Examples
```jldoctest
julia> push(@SVector[1, 2, 3], 4)
4-element SArray{Tuple{4},Int64,1,4} with indices SOneTo(4):
1
2
3
4
```
"""
@inline push(vec::StaticVector, x) = _push(Size(vec), vec, x)
@generated function _push(::Size{s}, vec::StaticVector, x) where {s}
newlen = s[1] + 1
exprs = vcat([:(vec[$i]) for i = 1:s[1]], :x)
return quote
@_inline_meta
@inbounds return similar_type(vec, Size($newlen))(tuple($(exprs...)))
end
end
"""
pushfirst(vec::StaticVector, item)
Return a new `StaticVector` with `item` inserted at the beginning of `vec`.
# Examples
```jldoctest
julia> pushfirst(@SVector[1, 2, 3, 4], 5)
5-element SArray{Tuple{5},Int64,1,5} with indices SOneTo(5):
5
1
2
3
4
```
"""
@inline pushfirst(vec::StaticVector, x) = _pushfirst(Size(vec), vec, x)
@generated function _pushfirst(::Size{s}, vec::StaticVector, x) where {s}
newlen = s[1] + 1
exprs = vcat(:x, [:(vec[$i]) for i = 1:s[1]])
return quote
@_inline_meta
@inbounds return similar_type(vec, Size($newlen))(tuple($(exprs...)))
end
end
"""
insert(vec::StaticVector, index::Integer, item)
Return a new vector with `item` inserted into `vec` at the given `index`.
# Examples
```jldoctest
julia> insert(@SVector[6, 5, 4, 2, 1], 4, 3)
6-element SArray{Tuple{6},Int64,1,6} with indices SOneTo(6):
6
5
4
3
2
1
```
"""
@propagate_inbounds insert(vec::StaticVector, index, x) = _insert(Size(vec), vec, index, x)
@generated function _insert(::Size{s}, vec::StaticVector, index, x) where {s}
newlen = s[1] + 1
exprs = [(i == 1 ? :(if $i < index; vec[$i] else x; end) :
i == newlen ? :(ifelse($i == index, x, vec[$i-1])) :
:(ifelse($i < index, vec[$i], ifelse($i == index, x, vec[$i-1])))) for i = 1:newlen]
return quote
@_propagate_inbounds_meta
@boundscheck if (index < 1 || index > $newlen)
throw(BoundsError(vec, index))
end
@inbounds return similar_type(vec, Size($newlen))(tuple($(exprs...)))
end
end
"""
pop(vec::StaticVector)
Return a new vector with the last item in `vec` removed.
# Examples
```jldoctest
julia> pop(@SVector[1,2,3])
2-element SArray{Tuple{2},Int64,1,2} with indices SOneTo(2):
1
2
```
"""
@inline pop(vec::StaticVector) = _pop(Size(vec), vec)
@generated function _pop(::Size{s}, vec::StaticVector) where {s}
newlen = s[1] - 1
exprs = [:(vec[$i]) for i = 1:s[1]-1]
return quote
@_inline_meta
@inbounds return similar_type(vec, Size($newlen))(tuple($(exprs...)))
end
end
"""
popfirst(vec::StaticVector)
Return a new vector with the first item in `vec` removed.
# Examples
```jldoctest
julia> popfirst(@SVector[1,2,3])
2-element SArray{Tuple{2},Int64,1,2} with indices SOneTo(2):
2
3
```
"""
@inline popfirst(vec::StaticVector) = _popfirst(Size(vec), vec)
@generated function _popfirst(::Size{s}, vec::StaticVector) where {s}
newlen = s[1] - 1
exprs = [:(vec[$i]) for i = 2:s[1]]
return quote
@_inline_meta
@inbounds return similar_type(vec, Size($newlen))(tuple($(exprs...)))
end
end
"""
deleteat(vec::StaticVector, index::Integer)
Return a new vector with the item at the given `index` removed.
# Examples
```jldoctest
julia> deleteat(@SVector[6, 5, 4, 3, 2, 1], 2)
5-element SArray{Tuple{5},Int64,1,5} with indices SOneTo(5):
6
4
3
2
1
```
"""
@propagate_inbounds deleteat(vec::StaticVector, index) = _deleteat(Size(vec), vec, index)
@generated function _deleteat(::Size{s}, vec::StaticVector, index) where {s}
newlen = s[1] - 1
exprs = [:(ifelse($i < index, vec[$i], vec[$i+1])) for i = 1:newlen]
return quote
@_propagate_inbounds_meta
@boundscheck if (index < 1 || index > $(s[1]))
throw(BoundsError(vec, index))
end
@inbounds return similar_type(vec, Size($newlen))(tuple($(exprs...)))
end
end
# TODO consider prepend, append (can use vcat, but eltype might change), and
# maybe splice (a bit hard to get statically sized without a "static" range)
# Immutable version of setindex!(). Seems similar in nature to the above, but
# could also be justified to live in src/indexing.jl
import Base.setindex
"""
setindex(vec::StaticArray, x, index::Int)
Return a new array with the item at `index` replaced by `x`.
# Examples
```jldoctest
julia> setindex(@SVector[1,2,3], 4, 2)
3-element SArray{Tuple{3},Int64,1,3} with indices SOneTo(3):
1
4
3
julia> setindex(@SMatrix[2 4; 6 8], 1, 2)
2×2 SArray{Tuple{2,2},Int64,2,4} with indices SOneTo(2)×SOneTo(2):
2 4
1 8
```
"""
@propagate_inbounds setindex(a::StaticArray, x, index::Int) = _setindex(Length(a), a, convert(eltype(typeof(a)), x), index)
@generated function _setindex(::Length{L}, a::StaticArray{<:Tuple,T}, x::T, index::Int) where {L, T}
exprs = [:(ifelse($i == index, x, a[$i])) for i = 1:L]
return quote
@_propagate_inbounds_meta
@boundscheck if (index < 1 || index > $(L))
throw(BoundsError(a, index))
end
@inbounds return typeof(a)(tuple($(exprs...)))
end
end
# TODO proper multidimension boundscheck
@propagate_inbounds setindex(a::StaticArray, x, inds...) = setindex(a, x, LinearIndices(a)[inds...])