"""
Test basic std::vector<bool> functionality.
"""

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


class TestBoolVector(TestBase):

    @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"))

        vector_type = "std::vector<bool>"
        size_type = vector_type + "::size_type"

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

        self.expect_expr("a",
                         result_type=vector_type,
                         result_children=[
                             ValueCheck(value="false"),
                             ValueCheck(value="true"),
                             ValueCheck(value="false"),
                             ValueCheck(value="true"),
                         ])
        self.expect_expr("a.size()", result_type=size_type, result_value="4")
        # FIXME: Without the casting the result can't be materialized.
        self.expect_expr("(bool)a.front()",
                         result_type="bool",
                         result_value="false")
        self.expect_expr("(bool)a[1]", result_type="bool", result_value="true")
        self.expect_expr("(bool)a.back()",
                         result_type="bool",
                         result_value="true")

        self.expect_expr("(bool)*a.begin()",
                         result_type="bool",
                         result_value="false")
        self.expect_expr("(bool)*a.rbegin()",
                         result_type="bool",
                         result_value="true")