163 lines
5.2 KiB
C++
163 lines
5.2 KiB
C++
#ifndef _SYMBOLTABLE_HH
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#define _SYMBOLTABLE_HH
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using namespace std;
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#include <map>
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#include <string>
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#include <vector>
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#include <ostream>
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#include <iostream>
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//! Enumeration of possible symbol types
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/*! Be careful not to change the order of the enumeration, it matters for VariableTable (at least up to eParameter) */
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enum Type
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{
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eEndogenous = 0, //!< Endogenous
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eExogenous = 1, //!< Exogenous
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eExogenousDet = 2, //!< Exogenous deterministic
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eRecursiveVariable = 3, //!< Recursive variable (reserved for future use)
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eParameter = 4, //!< Parameter
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eModelLocalVariable = 10, //!< Local variable whose scope is model (pound expression)
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eModFileLocalVariable = 11, //!< Local variable whose scope is mod file (model excluded)
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eUnknownFunction = 12 //!< Function unknown to the preprocessor
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};
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//! Stores the symbol table
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/*!
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A symbol is given by its name, and is internally represented by a pair (type, id).
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There is a distinct sequence of ids for each type, so two symbol of different types can have the same id.
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Also manages a TeX name for each symbol, which by default is an empty string.
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*/
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class SymbolTable
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{
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private:
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//! A symbol is represented by a pair (type, id)
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typedef pair<Type, int> symbol_type;
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//! Type for map: symbol_name -> (type, id)
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typedef map<string, symbol_type> symbol_table_type;
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//! Maps strings to pairs (type,id)
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symbol_table_type symbol_table;
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//! Type for map: (type, id) -> symbol_name
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typedef map<symbol_type, string> inv_symbol_table_type;
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//! Maps pairs (type, id) to names
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inv_symbol_table_type name_table;
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//! Maps pairs (type, id) to TeX names
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inv_symbol_table_type tex_name_table;
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public:
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SymbolTable();
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//! Thrown when trying to access an unknown symbol (by name)
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class UnknownSymbolNameException
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{
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public:
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//! Symbol name
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string name;
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UnknownSymbolNameException(const string &name_arg) : name(name_arg) {}
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};
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//! Thrown when trying to access an unknown symbol (by type+id pair)
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class UnknownSymbolIDException
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{
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public:
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//! Symbol type
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Type type;
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//! Symbol ID
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int id;
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UnknownSymbolIDException(Type type_arg, int id_arg) : type(type_arg), id(id_arg) {}
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};
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//! Thrown when trying to declare a symbol twice
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class AlreadyDeclaredException
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{
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public:
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//! Symbol name
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string name;
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//! Was the previous declaration done with the same symbol type ?
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bool same_type;
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AlreadyDeclaredException(const string &name_arg, bool same_type_arg) : name(name_arg), same_type(same_type_arg) {}
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};
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//! Number of declared endogenous variables
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int endo_nbr;
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//! Number of declared exogenous variables
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int exo_nbr;
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//! Number of declared deterministic exogenous variables
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int exo_det_nbr;
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//! Number of declared recursive variables
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int recur_nbr;
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//! Number of declared parameters
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int parameter_nbr;
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//! Number of model local variables
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int model_local_variable_nbr;
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//! Number of modfile local variables
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int modfile_local_variable_nbr;
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//! Number of unknown functions
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int unknown_function_nbr;
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//! Add a symbol
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void addSymbol(const string &name, Type type, const string &tex_name = "") throw (AlreadyDeclaredException);
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//! Tests if symbol already exists
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inline bool exists(const string &name) const;
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//! Get symbol name by type and ID
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inline string getNameByID(Type type, int id) const throw (UnknownSymbolIDException);
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//! Get TeX name by type and ID
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inline string getTeXNameByID(Type type, int id) const throw (UnknownSymbolIDException);
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//! Get type by name
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inline Type getType(const string &name) const throw (UnknownSymbolNameException);
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//! Get ID by name
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inline int getID(const string &name) const throw (UnknownSymbolNameException);
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//! Write output of this class
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void writeOutput(ostream &output) const;
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};
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inline bool
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SymbolTable::exists(const string &name) const
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{
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symbol_table_type::const_iterator iter = symbol_table.find(name);
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return (iter != symbol_table.end());
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}
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inline string
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SymbolTable::getNameByID(Type type, int id) const throw (UnknownSymbolIDException)
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{
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inv_symbol_table_type::const_iterator iter = name_table.find(make_pair(type, id));
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if (iter != name_table.end())
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return iter->second;
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else
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throw UnknownSymbolIDException(type, id);
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}
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inline string
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SymbolTable::getTeXNameByID(Type type, int id) const throw (UnknownSymbolIDException)
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{
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inv_symbol_table_type::const_iterator iter = tex_name_table.find(make_pair(type, id));
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if (iter != tex_name_table.end())
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return iter->second;
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else
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throw UnknownSymbolIDException(type, id);
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}
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inline Type
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SymbolTable::getType(const string &name) const throw (UnknownSymbolNameException)
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{
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symbol_table_type::const_iterator iter = symbol_table.find(name);
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if (iter != symbol_table.end())
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return iter->second.first;
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else
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throw UnknownSymbolNameException(name);
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}
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inline int
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SymbolTable::getID(const string &name) const throw (UnknownSymbolNameException)
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{
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symbol_table_type::const_iterator iter = symbol_table.find(name);
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if (iter != symbol_table.end())
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return iter->second.second;
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else
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throw UnknownSymbolNameException(name);
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}
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#endif
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