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v/vlib/compiler/tests/shift_test.v

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fn test_shift_operators() {
// check that shift works with all integer types
// as the right-hand side operand
a := 1
b := 1024
i := 10
assert b == a << i8(i)
assert b == a << byte(i)
assert b == a << i16(i)
assert b == a << u16(i)
assert b == a << int(i)
assert b == a << u32(i)
assert b == a << i64(i)
assert b == a << u64(i)
assert a == b >> i8(i)
assert a == b >> byte(i)
assert a == b >> i16(i)
assert a == b >> u16(i)
assert a == b >> int(i)
assert a == b >> u32(i)
assert a == b >> i64(i)
assert a == b >> u64(i)
// check that shift operation result type is
// the same as the type of the left-hand side operand
mut c := u64(0)
d := u64(1)
c = d << i8(63)
assert c == 9223372036854775808
// check that shift-assign works with all types
// of integers on the right-hand side
mut e := 1
e <<= i8(i)
assert e == b
e >>= i8(i)
assert e == a
e <<= i16(i)
assert e == b
e >>= i16(i)
assert e == a
e <<= int(i)
assert e == b
e >>= int(i)
assert e == a
e <<= i64(i)
assert e == b
e >>= i64(i)
assert e == a
e <<= byte(i)
assert e == b
e >>= byte(i)
assert e == a
e <<= u16(i)
assert e == b
e >>= u16(i)
assert e == a
e <<= u32(i)
assert e == b
e >>= u32(i)
assert e == a
e <<= u64(i)
assert e == b
e >>= u64(i)
assert e == a
}