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 |
# |
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# 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 |
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# - 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 |
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echo x=$x |
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|
32 |
setvar x += 4 |
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echo x=$x |
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## STDOUT: |
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x=7 |
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x=11 |
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## END |
38 |
|
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#### setvar when variable isn't declared results in fatal error |
40 |
var x = 1 |
41 |
f() { |
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# setting global is OK |
43 |
setvar x = 2 |
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echo x=$x |
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|
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setvar y = 3 # NOT DECLARED |
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echo y=$y |
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} |
49 |
f |
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## status: 1 |
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## STDOUT: |
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x=2 |
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## END |
54 |
|
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#### 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 |
|
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setvar y, x = x, y |
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echo x=$x y=$y |
67 |
|
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## STDOUT: |
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x=3 y=4 |
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x=1 y=9 |
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x=9 y=1 |
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## END |
73 |
|
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#### setvar d->key = 42 (setitem) |
75 |
shopt -s oil:all |
76 |
|
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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'] |
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var f2 = d->f2 |
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echo f3=$f3 |
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echo f2=$f2 |
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## STDOUT: |
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f3=43 |
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f2=42 |
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## END |
90 |
|
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#### 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 |
|