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// Test math operators.
// Test plus and minus.
#for v in (1, 3.14, 12pt, 45deg, 90%, 13% + 10pt, 6.3fr) {
// Test plus.
test(+v, v)
// Test minus.
test(-v, -1 * v)
test(--v, v)
// Test combination.
test(-++ --v, -v)
}
#test(-(4 + 2), 6-12)
// Addition.
#test(2 + 4, 6)
#test("a" + "b", "ab")
#test("a" + if false { "b" }, "a")
#test("a" + if true { "b" }, "ab")
#test(13 * "a" + "bbbbbb", "aaaaaaaaaaaaabbbbbb")
#test((1, 2) + (3, 4), (1, 2, 3, 4))
#test((a: 1) + (b: 2, c: 3), (a: 1, b: 2, c: 3))
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