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// file : CCF/IDL2/LexicalAnalyzer.hpp
// author : Boris Kolpackov <boris@dre.vanderbilt.edu>
// cvs-id : $Id$
#ifndef CCF_IDL2_LEXICAL_ANALYZER_HPP
#define CCF_IDL2_LEXICAL_ANALYZER_HPP
#include <set>
#include <map>
#include <deque>
#include <locale>
#include <string>
#include "CCF/CompilerElements/TokenStream.hpp"
#include "CCF/CompilerElements/PreprocessorToken.hpp"
#include "CCF/IDL2/Token.hpp"
namespace CCF
{
namespace IDL2
{
//@@ Call to get() after eof is illegal.
//
//
class LexicalAnalyzer : public CompilerElements::TokenStream<TokenPtr>
{
public:
virtual
~LexicalAnalyzer () throw () {}
public:
typedef
CompilerElements::CPP::Token
Char;
typedef
std::deque<Char>
CharBuffer;
LexicalAnalyzer (CompilerElements::TokenStream<Char>& is);
virtual TokenPtr
next ();
protected:
virtual Char
skip_space (Char c);
virtual TokenPtr
identifier (Char c);
virtual bool
punctuation (Char c, TokenPtr& token);
virtual bool
operator_ (Char c, TokenPtr& token);
virtual bool
character_literal (Char c, TokenPtr& token);
virtual bool
string_literal (Char c, TokenPtr& token);
virtual std::string
string_literal_trailer ();
virtual bool
integer_literal (Char c, TokenPtr& token);
// Literal scanners.
//
//
class Format {};
class Boundary {};
std::pair<char, std::size_t>
scan_char (char const* s) throw (Format);
std::string
scan_string (std::string const& s) throw (Format);
unsigned long long
scan_integer (std::string const& s, unsigned short base)
throw (Format, Boundary);
protected:
virtual Char
get ();
virtual Char
peek ();
virtual Char
peek_more ();
virtual void
ret (Char const& c);
protected:
// Character utility functions.
//
bool
is_alpha (char c) const
{
return std::isalpha (c, loc_);
}
bool
is_oct_digit (char c) const
{
return std::isdigit (c, loc_) && c != '8' && c != '9';
}
bool
is_dec_digit (char c) const
{
return std::isdigit (c, loc_);
}
bool
is_hex_digit (char c) const
{
return std::isxdigit (c, loc_);
}
bool
is_alnum (char c) const
{
return std::isalnum (c, loc_);
}
bool
is_space (char c) const
{
return std::isspace (c, loc_);
}
bool
is_eos (Char const& c) const
{
return c == Char::eos;
}
char
to_upper (char c) const
{
return std::toupper (c, loc_);
}
protected:
typedef
std::set<std::string>
KeywordTable;
struct IdentifierTreeNode
{
typedef
std::map<std::string, IdentifierTreeNode>
PrefixMap;
IdentifierTreeNode&
operator[] (char const* key)
{
return map_[key];
}
PrefixMap map_;
};
typedef
std::set<std::string>
PunctuationTable;
typedef
std::set<std::string>
OperatorTable;
protected:
bool
read_simple_identifier (std::string& lexeme, CharBuffer& buf);
bool
traverse_identifier_tree (std::string& lexeme,
IdentifierTreeNode const& node);
protected:
std::locale loc_;
CompilerElements::TokenStream<Char>& is_;
CharBuffer ibuffer_;
KeywordTable keyword_table_;
IdentifierTreeNode identifier_tree_;
PunctuationTable punctuation_table_;
OperatorTable operator_table_;
};
}
}
#endif // CCF_IDL2_LEXICAL_ANALYZER_HPP
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