1 ## oils_failures_allowed: 1
2
3 # Test a[1]
4
5 #### precedence of 1:3 vs comparison
6
7 # This test exposed nondeterminism in CPython itself! Gah. Is this because of
8 # the hashing?
9 # Python xrange objects probably shouldn't even be comparable!
10 #
11 # = 1..3 < 1..4
12 # >>> xrange(1,3) < xrange(1,4)
13 # False
14 # >>> xrange(1,3) < xrange(1,4)
15 # True
16
17 = 1..<3
18
19 ## STDOUT:
20 (Range 1 ..< 3)
21 ## END
22
23 #### precedence of 1:3 vs bitwise operator
24 = 3..<3|4
25 ## STDOUT:
26 (Range 3 ..< 7)
27 ## END
28
29 #### subscript and slice :| 1 2 3 4 |
30 var myarray = :|1 2 3 4|
31 pp test_ (myarray[1])
32 pp test_ (myarray[1:3])
33
34 echo 'implicit'
35 pp test_ (myarray[:2])
36 pp test_ (myarray[2:])
37
38 echo 'out of bounds'
39 pp test_ (myarray[:5])
40 pp test_ (myarray[-5:])
41
42 # Stride not supported
43 #= myarray[1:4:2]
44
45 # Now try omitting some
46 #= myarray[1:4:2]
47 ## STDOUT:
48 (Str) "2"
49 (List) ["2","3"]
50 implicit
51 (List) ["1","2"]
52 (List) ["3","4"]
53 out of bounds
54 (List) ["1","2","3","4"]
55 (List) ["1","2","3","4"]
56 ## END
57
58 #### Range end points can be int-looking Strings
59
60 pp test_ (list('3' ..< '6'))
61
62 var i = '5'
63
64 pp test_ (list(i ..< 7))
65 pp test_ (list(3 ..< i))
66
67 var i = '-5'
68
69 pp test_ (list(i ..< -3))
70 pp test_ (list(-7 ..< i))
71
72 # Not allowed
73 pp test_ ('a' ..< 'z')
74
75 ## status: 3
76 ## STDOUT:
77 (List) [3,4,5]
78 (List) [5,6]
79 (List) [3,4]
80 (List) [-5,-4]
81 (List) [-7,-6]
82 ## END
83
84 #### Slice indices can be int-looking strings
85
86 var a = list(0..<10)
87 #pp test_ (a)
88
89 pp test_ (a['3': '6'])
90
91 var i = '5'
92
93 pp test_ (a[i : 7])
94 pp test_ (a[3 : i])
95
96 var i = '-5'
97
98 pp test_ (a[i : -3])
99 pp test_ (a[-7 : i])
100
101 # Not allowed
102 pp test_ (a['a' : 'z'])
103
104 ## status: 3
105 ## STDOUT:
106 (List) [3,4,5]
107 (List) [5,6]
108 (List) [3,4]
109 (List) [5,6]
110 (List) [3,4]
111 ## END
112
113
114 #### slice subscripts are adjusted like Python
115
116 show-py() {
117 python3 -c '
118 import json, sys; a = [1, 2, 3, 4, 5]; print(json.dumps(eval(sys.argv[1])))' $1
119 }
120
121 show-ysh() {
122 eval "var a = [1, 2, 3, 4, 5]; json write ($1, space=0)"
123 }
124
125 compare() {
126 local expr=$1
127 show-py "$1" | sed 's/ //g'
128 show-ysh "$1"
129 echo
130 }
131
132 compare 'a[1:3]'
133 compare 'a[1:100]' # big number
134 compare 'a[100:1]' # inverted
135 compare 'a[1:-1]'
136 compare 'a[-3:-1]'
137 compare 'a[-100:-1]' # very negative
138 compare 'a[-1:-100]' # inverted
139 compare 'a[4:5]'
140
141 ## STDOUT:
142 [2,3]
143 [2,3]
144
145 [2,3,4,5]
146 [2,3,4,5]
147
148 []
149 []
150
151 [2,3,4]
152 [2,3,4]
153
154 [3,4]
155 [3,4]
156
157 [1,2,3,4]
158 [1,2,3,4]
159
160 []
161 []
162
163 [5]
164 [5]
165
166 ## END
167
168
169 #### subscript and slice of List
170 var mylist = [1,2,3,4]
171 pp test_ (mylist[1])
172 pp test_ (mylist[1:3])
173
174 echo 'implicit'
175 pp test_ (mylist[:2])
176 pp test_ (mylist[2:])
177 ## STDOUT:
178 (Int) 2
179 (List) [2,3]
180 implicit
181 (List) [1,2]
182 (List) [3,4]
183 ## END
184
185 #### expressions and negative indices
186 var myarray = :|1 2 3 4 5|
187 pp test_ (myarray[-1])
188 pp test_ (myarray[-4:-2])
189
190 echo 'implicit'
191 pp test_ (myarray[:-2])
192 pp test_ (myarray[-2:])
193 ## STDOUT:
194 (Str) "5"
195 (List) ["2","3"]
196 implicit
197 (List) ["1","2","3"]
198 (List) ["4","5"]
199 ## END
200
201 #### Index with expression
202 var mydict = {['5']: 3}
203 var val = mydict["$[2+3]"]
204 echo $val
205 ## STDOUT:
206 3
207 ## END
208
209 #### Copy with a[:]
210 var a = [1,2,3]
211 var b = a[:]
212 pp test_ (b)
213 ## STDOUT:
214 (List) [1,2,3]
215 ## END
216
217 #### Iterate over range
218 for i in (1..<5) {
219 echo $[i]
220 }
221 for i, n in (1..<4) {
222 echo "$[i], $[n]"
223 }
224 ## STDOUT:
225 1
226 2
227 3
228 4
229 0, 1
230 1, 2
231 2, 3
232 ## END
233
234 #### Loops over bogus ranges terminate
235 # Regression test for bug found during dev. Loops over backwards ranges should
236 # terminate immediately.
237 for i in (5..<1) {
238 echo $[i]
239 }
240 ## STDOUT:
241 ## END
242
243 #### Slices with Multiple Dimensions (for TSV8?)
244
245 qtt pretty :mytable <<< '''
246 name age:Int
247 alice 42
248 bob 31
249 carol 20
250 '''
251
252 # Cut off the first two rows
253 var t1 = mytable[2:, :]
254 = t1
255
256 var t2 = mytable[:2, 3:4]
257 = t2
258
259 var t3 = mytable[:2, %(name age)]
260 = t3
261
262 ## STDOUT:
263 (Str) 'TODO: Table Slicing'
264 (Str) 'TODO: Table Slicing'
265 ## END
266
267 #### Closed ranges
268
269 for x in (1..=2) {
270 echo $x
271 }
272
273 = 1..=2
274 ## STDOUT:
275 1
276 2
277 (Range 1 ..< 3)
278 ## END