Use of __HALT_COMPILER_OFFSET__ constant
-----
<?php

var_dump(__HALT_COMPILER_OFFSET__);
__halt_compiler();
Foo
-----
array(
    0: Expr_FuncCall(
        name: Name(
            parts: array(
                0: var_dump
            )
        )
        args: array(
            0: Arg(
                value: Expr_ConstFetch(
                    name: Name(
                        parts: array(
                            0: __HALT_COMPILER_OFFSET__
                        )
                    )
                )
                byRef: false
                unpack: false
            )
        )
    )
    1: Stmt_HaltCompiler(
        remaining:
    Foo
    )
)