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block: # issue #20142
let
s1: set['a' .. 'g'] = {'a', 'e'}
s2: set['a' .. 'g'] = {'b', 'c', 'd', 'f'} # this works fine
s3 = {'b', 'c', 'd', 'f'}
doAssert s1 != s2
doAssert s1 == {range['a'..'g'] 'a', 'e'}
doAssert s2 == {range['a'..'g'] 'b', 'c', 'd', 'f'}
# literal conversion:
doAssert s1 == {'a', 'e'}
doAssert s2 == {'b', 'c', 'd', 'f'}
doAssert s3 == {'b', 'c', 'd', 'f'}
doAssert not compiles(s1 == s3)
doAssert not compiles(s2 == s3)
# can't convert literal 'z', overload match fails
doAssert not compiles(s1 == {'a', 'z'})
block: # issue #18396
var s1: set[char] = {'a', 'b'}
var s2: set['a'..'z'] = {'a', 'b'}
doAssert s1 == {'a', 'b'}
doAssert s2 == {range['a'..'z'] 'a', 'b'}
doAssert s2 == {'a', 'b'}
doAssert not compiles(s1 == s2)
block: # issue #16270
var s1: set[char] = {'a', 'b'}
var s2: set['a'..'z'] = {'a', 'c'}
doAssert not (compiles do: s2 = s2 + s1)
s2 = s2 + {'a', 'b'}
doAssert s2 == {'a', 'b', 'c'}
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