1	# Oil Functions
2
3	#### Untyped func
4	shopt -s oil:all # parse_tea
5
6	func add(x, y) Int {
7	echo hi
8	return x + y
9	}
10	var result = add(42, 1)
11	echo $result
12	## STDOUT:
13	hi
14	43
15	## END
16
17	#### Typed func
18	shopt -s oil:all
19
20	func add(x Int, y Int) Int {
21	echo hi
22	return x+y
23	}
24	var result = add(42, 1)
25	echo $result
26	## STDOUT:
27	hi
28	43
29	## END
30
31	#### func: default values for positional params
32	shopt -s oil:all
33	func add(x Int, y=1, z=1+2*3) {
34	return x + y + z
35	}
36	echo $add(3)
37	echo $add(3,4)
38	## STDOUT:
39	11
40	14
41	## END
42
43	#### pass too many positional params to func (without spread)
44	shopt -s oil:all
45	func add(x, y) {
46	return x + y
47	}
48	var f = add(1,2)
49	echo f=$f
50	var f = add(1,2,3)
51	echo $f
52	## status: 1
53	## STDOUT:
54	f=3
55	## END
56
57	#### Positional Spread
58	shopt -s oil:all
59	func add(x, y, ...args) {
60	write @args
61	return x + y
62	}
63	var args = @[5 6 7 8]
64	var y = add(...args)
65	echo y=$y
66	## STDOUT:
67	7
68	8
69	y=11
70	## END
71
72	#### pass named arg to func
73	shopt -s oil:all
74
75	func f(; x=42) {
76	echo $x
77	}
78	pass f()
79	pass f(x=99)
80	## STDOUT:
81	42
82	99
83	## END
84
85	#### Func with missing named param with no default
86	shopt -s oil:all
87	func add(x Int, y Int ; verbose Bool) {
88	if (verbose) {
89	echo 'verbose'
90	}
91	return x + y
92	}
93	var a = add(3, 2, verbose=true)
94	echo $a
95
96	# crashes
97	var a = add(3, 2)
98	echo "shouldn't get here"
99	## status: 1
100	## STDOUT:
101	verbose
102	5
103	## END
104
105	#### Func passed wrong named param
106	shopt -s oil:all
107	func add(x, y) {
108	return x + y
109	}
110	var x = add(2, 3)
111	echo x=$x
112	var y = add(2, 3, verbose=true)
113
114	## status: 1
115	## STDOUT:
116	x=5
117	## END
118
119
120	#### Named Spread
121	shopt -s oil:all
122	func add(x, y; verbose=true, ...named) {
123	if (verbose) { echo 'verbose' }
124	write @named | sort
125	return x + y
126	}
127	var args = {verbose: false, a: 1, b: 2}
128	var args2 = {f: 3}
129	var ret = add(2, 3; ...args, ...args2)
130	echo ret=$ret
131	## STDOUT:
132	a
133	b
134	f
135	ret=5
136	## END
137
138	#### Func with varargs
139	shopt -s oil:all
140	func printf(fmt, ...args) {
141	= fmt
142	# Should be a LIST
143	= args
144	}
145	pass printf('foo', 'a', 42, null)
146
147	## STDOUT:
148	(Str) 'foo'
149	(Tuple) ('a', 42, None)
150	## END
151
152	#### return expression then return builtin
153	shopt -s parse_tea
154
155	func f(x) {
156	return x + 2*3
157	}
158	# this goes in proc
159	f() {
160	local x=42
161	return $x
162	}
163	var x = f(36)
164	echo x=$x
165	f
166	echo status=$?
167	## STDOUT:
168	x=42
169	status=42
170	## END
171
172	#### Open proc (any number of args)
173	proc f {
174	var x = 42
175	return x
176	}
177	# this gets called with 3 args then?
178	f a b c
179	echo status=$?
180	## STDOUT:
181	status=42
182	## END
183
184	#### Closed proc with no args, passed too many
185	proc f() {
186	return 42
187	}
188	f
189	echo status=$?
190
191	# TODO: This should abort, or have status 1
192	f a b
193	echo status=$?
194
195	## status: 1
196	## STDOUT:
197	status=42
198	## END
199
200	#### Open proc has "$@"
201	shopt -s oil:all
202	proc foo {
203	write ARGV "$@"
204	}
205	builtin set -- a b c
206	foo x y z
207	## STDOUT:
208	ARGV
209	x
210	y
211	z
212	## END
213
214	#### Closed proc doesn't have "$@"
215	shopt -s oil:all
216	proc foo(d, e, f) {
217	write params $d $e $f
218	write ARGV "$@"
219	}
220	builtin set -- a b c
221	foo x y z
222	## STDOUT:
223	params
224	x
225	y
226	z
227	ARGV
228	## END
229
230
231	#### Proc with default args
232	proc f(x='foo') {
233	echo x=$x
234	}
235	f
236	## STDOUT:
237	x=foo
238	## END
239
240	#### Proc with explicit args
241
242	# doesn't require oil:all
243	proc f(x, y, z) {
244	echo $x $y $z
245	var ret = 42
246	return ret # expression mode
247	}
248	# this gets called with 3 args then?
249	f a b c
250	echo status=$?
251	## STDOUT:
252	a b c
253	status=42
254	## END
255
256	#### Proc with varargs
257
258	# TODO: opts goes with this
259	# var opt = grep_opts.parse(ARGV)
260	#
261	# func(**opt) # Assumes keyword args match?
262	# parse :grep_opts :opt @ARGV
263
264	shopt -s oil:all
265
266	proc f(@names) {
267	write names: @names
268	}
269	# this gets called with 3 args then?
270	f a b c
271	echo status=$?
272	## STDOUT:
273	names:
274	a
275	b
276	c
277	status=0
278	## END
279
280	#### Proc name-with-hyphen
281	proc name-with-hyphen {
282	echo "$@"
283	}
284	name-with-hyphen x y z
285	## STDOUT:
286	x y z
287	## END
288
289	#### Proc with block arg
290
291	# TODO: Test more of this
292	proc f(x, y, &block) {
293	echo hi
294	}
295	f a b
296	## STDOUT:
297	hi
298	## END
299
300	#### inline function calls with spread, named args, etc.
301	shopt -s oil:all
302
303	func f(a, b=0, ...args; c, d=0, ...named) {
304	write __ args: @args
305	write __ named:
306	write @named | sort
307	if (named) {
308	return [a, b, c, d]
309	} else {
310	return a + b + c + d
311	}
312	}
313	var a = [42, 43]
314	var n = {x: 99, y: 100}
315
316	echo ____
317	write string $f(0, 1, ...a, c=2, d=3)
318
319	# Now get a list back
320	echo ____
321	write array @f(5, 6, ...a, c=7, d=8; ...n)
322
323	## STDOUT:
324	____
325	__
326	args:
327	42
328	43
329	__
330	named:
331
332	string
333	6
334	____
335	__
336	args:
337	42
338	43
339	__
340	named:
341	x
342	y
343	array
344	5
345	6
346	7
347	8
348	## END
349
350	#### basic lambda
351	var f = |x| x+1
352	var y = f(0)
353	echo $y
354	echo $f(42)
355	## STDOUT:
356	1
357	43
358	## END
359
360	#### proc returning wrong type
361
362	# this should print an error message
363	proc f {
364	var a = @(one two)
365	return a
366	}
367	f
368	## STDOUT:
369	## END
370
371	#### proc returning invalid string
372
373	# this should print an error message
374	proc f {
375	var s = 'not an integer status'
376	return s
377	}
378	f
379	## STDOUT:
380	## END