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|
discard """
output: '''
tdiscardable
1
1
something defered
something defered
hi
'''
"""
echo "tdiscardable"
# Test the discardable pragma
proc p(x, y: int): int {.discardable.} =
return x + y
# test that it is inherited from generic procs too:
proc q[T](x, y: T): T {.discardable.} =
return x + y
p(8, 2)
q[float](0.8, 0.2)
# bug #942
template maybeMod(x: SomeInteger, module: Natural): untyped =
if module > 0: x mod module
else: x
proc foo(b: int):int =
var x = 1
result = x.maybeMod(b) # Works fine
proc bar(b: int):int =
result = 1
result = result.maybeMod(b) # Error: value returned by statement has to be discarded
echo foo(0)
echo bar(0)
# bug #9726
proc foo: (proc: int) =
proc bar: int = 1
return bar
discard foo()
# bug #10842
proc myDiscardable(): int {.discardable.} =
discard
proc main1() =
defer:
echo "something defered"
discard myDiscardable()
proc main2() =
defer:
echo "something defered"
myDiscardable()
main1()
main2()
block: # bug #13583
block:
proc hello(): int {.discardable.} = 12
iterator test(): int {.closure.} =
while true:
hello()
let t = test
block:
proc hello(): int {.discardable.} = 12
iterator test(): int {.closure.} =
while true:
block:
yield 12
hello()
let t = test
doAssert t() == 12
block:
proc hello(): int {.discardable.} = 12
iterator test(): int {.closure.} =
while true:
yield 12
hello()
let t = test
doAssert t() == 12
block:
proc bar(): string {.discardable.} =
"15"
proc foo(): int =
while true:
raise newException(ValueError, "check")
12
doAssertRaises(ValueError):
doAssert foo() == 12
block: # issue #10440
proc x(): int {.discardable.} = discard
try:
x()
finally:
echo "hi"
import macros
block: # issue #14665
macro test(): untyped =
let b = @[1, 2, 3, 4]
result = nnkStmtList.newTree()
var i = 0
while i < b.len:
if false:
# this quote do is mandatory, removing it fixes the problem
result.add quote do:
let testtest = 5
else:
result.add quote do:
let test = 6
inc i
# removing this continue fixes the problem too
continue
inc i
test()
block: # bug #23775
proc retInt(): int {.discardable.} =
42
proc retString(): string {.discardable.} =
"text"
type
Enum = enum
A, B, C, D
proc doStuff(msg: Enum) =
case msg:
of A:
retString()
of B:
retInt()
of C:
discard retString()
else:
let _ = retString()
doStuff(C)
block:
proc test(): (int, int) {.discardable.} =
discard
if true:
test()
else:
quit()
|