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// $G $F.go && $L $F.$A && ./$A.out

// Copyright 2009 The Go Authors. All rights reserved.

// Use of this source code is governed by a BSD-style

// license that can be found in the LICENSE file.

package main

func assert(cond bool, msg string) {

        if !cond {

                print("assertion fail: ", msg, "\n")

                panic(1)

        }

}

const (

        x int = iota

        y = iota

        z = 1 << iota

        f float32 = 2 * iota

        g float32 = 4.5 * float32(iota)

)

const (

        X = 0

        Y

        Z

)

const (

        A = 1 << iota

        B

        C

        D

        E = iota * iota

        F

        G

)

const (

        a = 1

        b = iota << a

        c = iota << b

        d

)

const (

        i = (a << iota) + (b * iota)

        j

        k

        l

)

const (

        m = iota == 0

        n

)

const (

        p = float32(iota)

        q

        r

)

const (

        s = string(iota + 'a')

        t

)

const (

        abit, amask = 1 << iota, 1<

        bbit, bmask = 1 << iota, 1<

        cbit, cmask = 1 << iota, 1<

)

func main() {

        assert(x == 0, "x")

        assert(y == 1, "y")

        assert(z == 4, "z")

        assert(f == 6.0, "f")

        assert(g == 18.0, "g")

        assert(X == 0, "X")

        assert(Y == 0, "Y")

        assert(Z == 0, "Z")

        assert(A == 1, "A")

        assert(B == 2, "B")

        assert(C == 4, "C")

        assert(D == 8, "D")

        assert(E == 16, "E")

        assert(F == 25, "F")

        assert(a == 1, "a")

        assert(b == 2, "b")

        assert(c == 8, "c")

        assert(d == 12, "d")

        assert(i == 1, "i")

        assert(j == 4, "j")

        assert(k == 8, "k")

        assert(l == 14, "l")

        assert(m, "m")

        assert(!n, "n")

        assert(p == 0.0, "p")

        assert(q == 1.0, "q")

        assert(r == 2.0, "r")

        assert(s == "a", "s")

        assert(t == "b", "t")

        assert(abit == 1, "abit")

        assert(amask == 0, "amask")

        assert(bbit == 2, "bbit")

        assert(bmask == 1, "bmask")

        assert(cbit == 4, "cbit")

        assert(cmask == 3, "cmask")

}