text: //===-- lib/common/idioms.cpp ---------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  #include "flang/common/idioms.h"
  #include <cstdarg>
  #include <cstdio>
  #include <cstdlib>
  
  namespace Fortran::common {
  
  [[noreturn]] void die(const char *msg, ...) {
    va_list ap;
    va_start(ap, msg);
    std::fputs("\nfatal internal error: ", stderr);
    std::vfprintf(stderr, msg, ap);
    va_end(ap);
    fputc('\n', stderr);
    std::abort();
  }
  
  // Convert the int index of an enumerator to a string.
  // enumNames is a list of the names, separated by commas with optional spaces.
  // This is intended for use from the expansion of ENUM_CLASS.
  std::string EnumIndexToString(int index, const char *enumNames) {
    const char *p{enumNames};
    for (; index > 0; --index, ++p) {
      for (; *p && *p != ','; ++p) {
      }
    }
    for (; *p == ' '; ++p) {
    }
    CHECK(*p != '\0');
    const char *q = p;
    for (; *q && *q != ' ' && *q != ','; ++q) {
    }
    return std::string(p, q - p);
  }
  }
  