case castInt, castInteger:
		i, err := intCast(v)
		return FromInt(i), err

	case castFloat:
		f, err := floatCast(v)
		return FromFloat(f), err

	case castString:
		s, err := stringCast(v)
		return FromString(s), err

	case castTimestamp:
		t, err := timestampCast(v)
		return FromTimestamp(t), err

	case castBool:
		b, err := boolCast(v)
		return FromBool(b), err

		return false
	}
	return true
}

func (check *Checker) tag(t *syntax.BasicLit) string {
	// If t.Bad, an error was reported during parsing.
	if t != nil && !t.Bad {
		if t.Kind == syntax.StringLit {
			if val, err := strconv.Unquote(t.Value); err == nil {
				return val
			}
		}
		check.errorf(t, InvalidSyntaxTree, "incorrect tag syntax: %q", t.Value)
	}
	return ""
}

	ImportDecl struct {
		Group        *Group // nil means not part of a group
		Pragma       Pragma
		LocalPkgName *Name     // including "."; nil means no rename present
		Path         *BasicLit // Path.Bad || Path.Kind == StringLit; nil means no path
		decl
	}

	// NameList
	// NameList      = Values
	// NameList Type = Values
	ConstDecl struct {
		Group    *Group // nil means not part of a group
		Pragma   Pragma
		NameList []*Name

			s.errorf("newline in string")
			ok = false
			break
		}
		if s.ch < 0 {
			s.errorAtf(0, "string not terminated")
			ok = false
			break
		}
		s.nextch()
	}

	s.setLit(StringLit, ok)
}

func (s *scanner) rawString() {
	ok := true
	s.nextch()

	for {
		if s.ch == '`' {
			s.nextch()
			break
		}
		if s.ch < 0 {
			s.errorAtf(0, "string not terminated")

		}
	}
}

// Test case for any function which accepts and returns a single string.
type StringTest struct {
	in, out string
}

// Execute f on each test case.  funcName should be the name of f; it's used
// in failure reports.
func runStringTests(t *testing.T, f func(string) string, funcName string, testCases []StringTest) {
	for _, tc := range testCases {
		actual := f(tc.in)
		if actual != tc.out {

			}
		}
	}
}

// Test case for any function which accepts and returns a byte slice.
// For ease of creation, we write the input byte slice as a string.
type StringTest struct {
	in  string
	out []byte
}

var upperTests = []StringTest{
	{"", []byte("")},
	{"ONLYUPPER", []byte("ONLYUPPER")},
	{"abc", []byte("ABC")},
	{"AbC123", []byte("ABC123")},
	{"azAZ09_", []byte("AZAZ09_")},

	switch k {
	case syntax.IntLit:
		kind = UntypedInt
	case syntax.FloatLit:
		kind = UntypedFloat
	case syntax.ImagLit:
		kind = UntypedComplex
	case syntax.RuneLit:
		kind = UntypedRune
	case syntax.StringLit:
		kind = UntypedString
	default:
		panic("unreachable")
	}

	val := makeFromLiteral(lit, k)
	if val.Kind() == constant.Unknown {
		x.mode = invalid
		x.typ = Typ[Invalid]
		return
	}

//
// Please note that ValuesIn copies the values from the containers
// passed in and keeps them to generate tests in RUN_ALL_TESTS().
//
// Examples:
//
// This instantiates tests from test case StringTest
// each with C-string values of "foo", "bar", and "baz":
//
// const char* strings[] = {"foo", "bar", "baz"};
// INSTANTIATE_TEST_CASE_P(StringSequence, SrtingTest, ValuesIn(strings));
//

        # containing multiple flags (and there are cases that do this).
        "flags": attr.string(),
        # Extra flags are built in the tf_library macro as a list.
        "extra_flags": attr.string_list(),
        "dfsan": attr.bool(default = False),
        "dfsan_abilists": attr.label_list(default = [], allow_files = True),
        "is_linux": attr.bool(),
        "gen_compiler_log": attr.bool(),

//
// Please note that ValuesIn copies the values from the containers
// passed in and keeps them to generate tests in RUN_ALL_TESTS().
//
// Examples:
//
// This instantiates tests from test case StringTest
// each with C-string values of "foo", "bar", and "baz":
//
// const char* strings[] = {"foo", "bar", "baz"};
// INSTANTIATE_TEST_CASE_P(StringSequence, SrtingTest, ValuesIn(strings));
//