"""
Tests standard library iterators.
"""

from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil


class TestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    @add_test_categories(["libc++"])
    @skipIf(compiler=no_match("clang"))
    def test(self):
        self.build()

        lldbutil.run_to_source_breakpoint(self,
                                          "// Set break point at this line.",
                                          lldb.SBFileSpec("main.cpp"))

        self.runCmd("settings set target.import-std-module true")

        iter_type = "std::move_iterator<std::__wrap_iter<int *> >"

        self.expect_expr("move_begin", result_type=iter_type)
        self.expect_expr("move_begin[0]", result_type="int", result_value="1")

        self.expect_expr("move_begin + 3 == move_end", result_value="true")

        self.expect("expr move_begin++")
        self.expect_expr("move_begin + 2 == move_end", result_value="true")
        self.expect("expr move_begin--")
        self.expect_expr("move_begin + 3 == move_end", result_value="true")
