package language

import (
	"bytes"
	"errors"
	"fmt"
	"sort"

	"golang.org/x/text/internal/tag"
)

// isAlpha returns true if the byte is not a digit.
// b must be an ASCII letter or digit.
func isAlpha(b byte) bool {
	return b > '9'
}

// isAlphaNum returns true if the string contains only ASCII letters or digits.
func isAlphaNum(s []byte) bool {
	for _, c := range s {

				currentMajor: 1,
				currentMinor: 20,
				isAlpha:      true,
			},
			restStorage: storageRemovedIn(1, 20),
			expected:    true,
		},
		{
			name: "removed-in-curr-but-alpha-but-strict",
			resourceExpirationEvaluator: resourceExpirationEvaluator{
				currentMajor:                 1,
				currentMinor:                 20,
				isAlpha:                      true,
				strictRemovedHandlingInAlpha: true,

}

std::optional<llvm::SmallDenseMap<char, int64_t>> EquationToMap(
    llvm::StringRef equation) {
  llvm::SmallDenseMap<char, int64_t> map;
  for (int64_t i = 0; i < equation.size(); ++i) {
    if (!std::isalpha(equation[i])) {
      // Unsupported character in the equation.
      return std::nullopt;
    }
    if (map.count(equation[i])) {
      // Duplicate character in the equation.
      return std::nullopt;
    }

namespace tensorflow {
namespace tfcompile {

namespace {

using BufferInfo = xla::cpu_function_runtime::BufferInfo;

bool IsAlpha(char c) {
  return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
}

bool IsAlphaNum(char c) { return IsAlpha(c) || (c >= '0' && c <= '9'); }

// Convert an XLA type into a C++ type.
Status XLATypeToCpp(xla::PrimitiveType type, string* str) {
  switch (type) {

}

type Region uint16

// getRegionID returns the region id for s if s is a valid 2-letter region code
// or unknownRegion.
func getRegionID(s []byte) (Region, error) {
	if len(s) == 3 {
		if isAlpha(s[0]) {
			return getRegionISO3(s)
		}
		if i, err := strconv.ParseUint(string(s), 10, 10); err == nil {
			return getRegionM49(int(i))
		}
	}
	return getRegionISO2(s)
}