// file      : build/parser -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license   : MIT; see accompanying LICENSE file

#ifndef BUILD_PARSER
#define BUILD_PARSER

#include <string>
#include <iosfwd>
#include <exception>

#include <build/path>

namespace build
{
  class token;
  enum class token_type;
  class lexer;

  // The handler must assume the diagnostics has already been issued.
  //
  struct parser_error: std::exception {};

  class parser
  {
  public:
    parser (std::ostream& diag): diag_ (diag) {}

    void
    parse (std::istream&, const path&);

    // Recursive descent parser.
    //
  private:
    void
    names (token&, token_type&);

    // Utilities.
    //
  private:
    void
    next (token&, token_type&);

    std::ostream&
    error (const token&);

  private:
    std::ostream& diag_;

    lexer* lexer_;
    const path* path_;
  };
}

#endif // BUILD_PARSER