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Assignments
-----
<?php
// simple assign
$a = $b;

// combined assign
$a &= $b;
$a |= $b;
$a ^= $b;
$a .= $b;
$a /= $b;
$a -= $b;
$a %= $b;
$a *= $b;
$a += $b;
$a <<= $b;
$a >>= $b;

// by ref assign
$a =& $b;
$a =& new B;

// list() assign
list($a) = $b;
list($a, , $b) = $c;
list($a, list(, $c), $d) = $e;

// inc/dec
++$a;
$a++;
--$a;
$a--;
-----
array(
    0: Expr_Assign(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    1: Expr_AssignBitwiseAnd(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    2: Expr_AssignBitwiseOr(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    3: Expr_AssignBitwiseXor(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    4: Expr_AssignConcat(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    5: Expr_AssignDiv(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    6: Expr_AssignMinus(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    7: Expr_AssignMod(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    8: Expr_AssignMul(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    9: Expr_AssignPlus(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    10: Expr_AssignShiftLeft(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    11: Expr_AssignShiftRight(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    12: Expr_AssignRef(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_Variable(
            name: b
        )
    )
    13: Expr_AssignRef(
        var: Expr_Variable(
            name: a
        )
        expr: Expr_New(
            class: Name(
                parts: array(
                    0: B
                )
            )
            args: array(
            )
        )
    )
    14: Expr_Assign(
        var: Expr_List(
            vars: array(
                0: Expr_Variable(
                    name: a
                )
            )
        )
        expr: Expr_Variable(
            name: b
        )
    )
    15: Expr_Assign(
        var: Expr_List(
            vars: array(
                0: Expr_Variable(
                    name: a
                )
                1: null
                2: Expr_Variable(
                    name: b
                )
            )
        )
        expr: Expr_Variable(
            name: c
        )
    )
    16: Expr_Assign(
        var: Expr_List(
            vars: array(
                0: Expr_Variable(
                    name: a
                )
                1: Expr_List(
                    vars: array(
                        0: null
                        1: Expr_Variable(
                            name: c
                        )
                    )
                )
                2: Expr_Variable(
                    name: d
                )
            )
        )
        expr: Expr_Variable(
            name: e
        )
    )
    17: Expr_PreInc(
        var: Expr_Variable(
            name: a
        )
    )
    18: Expr_PostInc(
        var: Expr_Variable(
            name: a
        )
    )
    19: Expr_PreDec(
        var: Expr_Variable(
            name: a
        )
    )
    20: Expr_PostDec(
        var: Expr_Variable(
            name: a
        )
    )
)

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