// license that can be found in the LICENSE file.

package demangle

import (
	"fmt"
	"math"
	"math/bits"
	"strings"
	"unicode/utf8"
)

// rustToString demangles a Rust symbol.
func rustToString(name string, options []Option) (ret string, err error) {
	if !strings.HasPrefix(name, "_R") {
		return "", ErrNotMangledName
	}

	// When the demangling routines encounter an error, they panic

// If the name does not appear to be a C++ or Rust symbol name at all,
// the error will be ErrNotMangledName.
func ToString(name string, options ...Option) (string, error) {
	if strings.HasPrefix(name, "_R") {
		return rustToString(name, options)
	}

	// Check for an old-style Rust mangled name.
	// It starts with _ZN and ends with "17h" followed by 16 hex digits
	// followed by "E" followed by an optional suffix starting with "."