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// -*- C++ -*-
// Copyright 2005 Red Hat Inc.
// GPL
#include <string>
#include <fstream>
#include <iostream>
#include <vector>
#include <stdexcept>
struct source_loc
{
std::string file;
unsigned line;
unsigned column;
};
enum token_type
{
tok_junk, tok_identifier, tok_operator, tok_string, tok_number
};
struct token
{
source_loc location;
token_type type;
std::string content;
};
std::ostream& operator << (std::ostream& o, const token& t);
struct parse_error: public std::runtime_error
{
parse_error (const std::string& msg): runtime_error (msg) {}
};
class lexer
{
public:
token* scan ();
lexer (std::istream&, const std::string&);
private:
int input_get ();
std::istream& input;
std::string input_name;
unsigned cursor_line;
unsigned cursor_column;
};
class parser
{
public:
parser (std::istream& i);
parser (const std::string& n);
~parser ();
stapfile* parse ();
static stapfile* parse (std::istream& i);
static stapfile* parse (const std::string& n);
private:
std::string input_name;
std::istream* free_input;
lexer input;
// scanning state
const token* last ();
const token* next ();
const token* peek ();
const token* last_t; // the last value returned by peek() or next()
const token* next_t; // lookahead token
void print_error (const parse_error& pe);
unsigned num_errors;
private: // nonterminals
probe* parse_probe ();
probe_point* parse_probe_point ();
literal* parse_literal ();
void parse_global (vector<vardecl*>&);
functiondecl* parse_functiondecl ();
block* parse_stmt_block ();
statement* parse_statement ();
if_statement* parse_if_statement ();
return_statement* parse_return_statement ();
delete_statement* parse_delete_statement ();
expression* parse_expression ();
expression* parse_assignment ();
expression* parse_ternary ();
expression* parse_logical_or ();
expression* parse_logical_and ();
expression* parse_array_in ();
expression* parse_comparison ();
expression* parse_concatenation ();
expression* parse_additive ();
expression* parse_multiplicative ();
expression* parse_unary ();
expression* parse_exponentiation ();
expression* parse_crement ();
expression* parse_value ();
expression* parse_symbol ();
symbol* parse_symbol_plain ();
};
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