class Statement

(Return to index)

Interface for statements.

The statement is stored as a list of Token's.

Type:	Abstract
Include file:	./Parser/Statement.hh

Inheritance

Synopsis (including inherited members):

• Public members:
  • typedef std::list<Token> TokenList ;
  • Statement (const string&,int) ;
  • Statement (const string&,TokenList&) ;
  • virtual ~Statement () ;
  • void append (const Token&) ;
  • bool atEnd ()const ;
  • bool boolean (bool&) ;
  • bool delimiter (char) ;
  • bool delimiter (const char*) ;
  • virtual void execute (const Parser&) = 0 ;
  • Token& getCurrent () ;
  • bool integer (int&) ;
  • bool integer (unsigned&) ;
  • bool keyword (const char*) ;
  • bool real (double&) ;
  • bool str (string&) ;
  • bool word (string&) ;
  • void mark () ;
  • void restore () ;
  • void start () ;
  • void skip () ;
  • virtual void print (std::ostream&)const ;
  • virtual void printWhere (std::ostream&,bool)const ;
• Protected Members:
  • int stat_line ;
  • string buffer_name ;
  • TokenList tokens ;
  • TokenList::iterator curr ;
  • TokenList::iterator keep ;

Documentation:

• Public members:

  Statement (const string&,int) ;

  Constructor.
  Store the stream name and the line where the statement begins.

  Statement (const string&,TokenList&) ;

  Constructor.
  Stores a name (e.g. for a macro) and the token list.

  typedef std::list<Token> TokenList ;

  The type of the enclosed token list.

  void append (const Token&) ;

  Append a token.

  bool atEnd ()const ;

  Test for end of command.
  This method is called by the parser in order to find out wether the end of the statement has been reached.

  bool boolean (bool&) ;

  Return boolean value.
  If the next item is a boolean literal:

  1. Set valu" to its value.
  2. Skip the value in the token list.
  3. Return true.

  Otherwise return false.

  bool delimiter (char) ;

  Test for delimiter.
  If the next item is the given character, skip it and return true, otherwise return false.

  bool delimiter (const char*) ;

  Test for delimiter choice.
  If the next item is one of the characters in the given string, skip it and return true, otherwise return false.

  virtual void execute (const Parser&) = 0 ;

  Execute.
  This method must be specially defined in conditional or loop statements. Normally it just calls the parser to execute the statement.

  Token& getCurrent () ;

  Return current token and skip it.

  bool integer (int&) ;

  Return signed integer.
  If the next item is an integer:

  1. Set value to its value.
  2. Skip the value in the token list.
  3. Return true.

  Otherwise return false.

  bool integer (unsigned&) ;

  Return unsigned integer.
  If the next item is an integer:

  1. Set value to its value.
  2. Skip the value in the token list.
  3. Return true.

  Otherwise return false.

  bool keyword (const char*) ;

  Test for keyword.
  If the next item is the keyword s, skip it and return true, otherwise return false.

  void mark () ;

  Mark position in command.
  Parsing can later be resumed by calling restore().

  virtual void print (std::ostream&)const ;

  Print statement.
  Print the statement on os.

  virtual void printWhere (std::ostream&,bool)const ;

  Print position.
  Print a message, containing the stream name and its line in the input stream. If withToken is true, print also the last token parsed.

  bool real (double&) ;

  Return real value.
  If the next item is a real number:

  1. Set value to its value.
  2. Skip the value in the token list.
  3. Return true.

  Otherwise return false.

  void restore () ;

  Return to marked position.
  Resume parsing at the position wher mark() was last called.

  void skip () ;

  Skip.
  Skip tokens up to next comma or end of statement, whichever comes first.

  void start () ;

  Return to start.
  Resume parsing at the beginning of the statement.

  bool str (string&) ;

  Return string value.
  If the next item is a string literal:

  1. Set value to its value.
  2. Skip the value in the token list.
  3. Return true.

  Otherwise return false.

  bool word (string&) ;

  Return word value.
  If the next item is a word:

  1. Set value to its value.
  2. Skip the value in the token list.
  3. Return true.

  Otherwise return false.

• Protected members: