1	# Test var / setvar / etc.
2
3	# TODO: GetVar needs a mode where Obj[str] gets translated to value.Str?
4	# Then all code will work.
5	#
6	# word_eval:
7	#
8	# val = self.mem.GetVar(var_name) ->
9	# val = GetWordVar(self.mem, var_name)
10	#
11	# Conversely, in oil_lang/expr_eval.py:
12	# LookupVar gives you a plain Python object. I don't think there's any
13	# downside here.
14	#
15	# repr exposes the differences.
16	#
17	# Notes:
18	#
19	# - osh/cmd_exec.py handles OilAssign, which gets wrapped in value.Obj()
20	# - osh/word_eval.py _ValueToPartValue handles 3 value types. Used in:
21	# - _EvalBracedVarSub
22	# - SimpleVarSub in _EvalWordPart
23	# - osh/expr_eval.py: _LookupVar wrapper should disallow using Oil values
24	# - this is legacy stuff. Both (( )) and [[ ]]
25	# - LhsIndexedName should not reference Oil vars either
26
27
28	#### integers expression and augmented assignment
29	var x = 1 + 2 * 3
30	echo x=$x
31
32	setvar x += 4
33	echo x=$x
34	## STDOUT:
35	x=7
36	x=11
37	## END
38
39	#### setvar when variable isn't declared results in fatal error
40	var x = 1
41	f() {
42	# setting global is OK
43	setvar x = 2
44	echo x=$x
45
46	setvar y = 3 # NOT DECLARED
47	echo y=$y
48	}
49	f
50	## status: 1
51	## STDOUT:
52	x=2
53	## END
54
55	#### var/setvar x, y = 1, 2
56
57	# Python doesn't allow you to have annotation on each variable!
58	# https://www.python.org/dev/peps/pep-0526/#where-annotations-aren-t-allowed
59	var x Int, y Int = 3, 4
60	echo x=$x y=$y
61
62	setvar x, y = 1, 9
63	echo x=$x y=$y
64
65	setvar y, x = x, y
66	echo x=$x y=$y
67
68	## STDOUT:
69	x=3 y=4
70	x=1 y=9
71	x=9 y=1
72	## END
73
74	#### setvar d->key = 42 (setitem)
75	shopt -s oil:all
76
77	var d = {}
78	setvar d['f2'] = 42
79	setvar d->f3 = 43
80
81	# Use the opposite thing to retrieve
82	var f3 = d['f3']
83	var f2 = d->f2
84	echo f3=$f3
85	echo f2=$f2
86	## STDOUT:
87	f3=43
88	f2=42
89	## END
90
91	#### setvar mylist[1] = 42 (setitem)
92	shopt -s oil:all
93	var mylist = [1,2,3]
94	setvar mylist[1] = 42
95
96	echo -sep ' ' @mylist
97	## STDOUT:
98	1 42 3
99	## END
100
101	#### setvar obj.attr = 42 (setattr)
102	shopt -s oil:all
103
104	# TODO: dicts and list can't have arbitrary attributes set. But right now
105	# regex objects can. Should we change that?
106
107	var myobj = /d+/
108
109	setvar myobj.x = 42
110	var val = myobj.x
111	echo val=$val
112	## STDOUT:
113	val=42
114	## END
115
116	#### setvar f()[2] = 42 (setitem)
117	shopt -s oil:all
118
119	var mylist = [1,2,3]
120	func f() {
121	return mylist
122	}
123	setvar f()[2] = 42
124	echo @mylist
125	## STDOUT:
126	1
127	2
128	42
129	## END
130
131	#### duplicate var def results in fatal error
132	var x = "global"
133	f() {
134	var x = "local"
135	echo x=$x
136	}
137	f
138	var x = "redeclaration is an error"
139	## status: 1
140	## STDOUT:
141	x=local
142	## END
143
144	#### setvar dynamic scope (TODO: change this?)
145	modify_with_shell_assignment() {
146	f=shell
147	}
148
149	modify_with_setvar() {
150	setvar f = "setvar"
151	}
152
153	f() {
154	var f = 1
155	echo f=$f
156	modify_with_shell_assignment
157	echo f=$f
158	modify_with_setvar
159	echo f=$f
160	}
161	f
162	## STDOUT:
163	f=1
164	f=shell
165	f=setvar
166	## END
167