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ParsingDriver.hh

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  • ParsingDriver.hh 27.83 KiB
    /*
     * Copyright (C) 2003-2013 Dynare Team
     *
     * This file is part of Dynare.
     *
     * Dynare is free software: you can redistribute it and/or modify
     * it under the terms of the GNU General Public License as published by
     * the Free Software Foundation, either version 3 of the License, or
     * (at your option) any later version.
     *
     * Dynare is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
     */
    
    #ifndef _PARSING_DRIVER_HH
    #define _PARSING_DRIVER_HH
    
    #ifdef _MACRO_DRIVER_HH
    # error Impossible to include both ParsingDriver.hh and MacroDriver.hh
    #endif
    
    #include <string>
    #include <vector>
    #include <istream>
    #include <stack>
    
    #include "ModFile.hh"
    #include "SymbolList.hh"
    
    class ParsingDriver;
    #include "ExprNode.hh"
    #include "DynareBison.hh"
    
    #include "ComputingTasks.hh"
    #include "Shocks.hh"
    #include "SigmaeInitialization.hh"
    #include "NumericalInitialization.hh"
    #include "DynamicModel.hh"
    
    using namespace std;
    
    // Declare DynareFlexLexer class
    #ifndef __FLEX_LEXER_H
    # define yyFlexLexer DynareFlexLexer
    # include <FlexLexer.h>
    # undef yyFlexLexer
    #endif
    
    //! The lexer class
    /*! Actually it was necessary to subclass the DynareFlexLexer class generated by Flex,
      since the prototype for DynareFlexLexer::yylex() was not convenient.
    */
    class DynareFlex : public DynareFlexLexer
    {
    public:
      DynareFlex(istream *in = 0, ostream *out = 0);
    
      //! The main lexing function
      Dynare::parser::token_type lex(Dynare::parser::semantic_type *yylval,
                                     Dynare::parser::location_type *yylloc,
                                     ParsingDriver &driver);
    
      //! The filename being parsed
      /*! The bison parser locations (begin and end) contain a pointer to that string */
      string filename;
    
      //! Increment the location counter given a token
      void location_increment(Dynare::parser::location_type *yylloc, const char *yytext);
    };
    
    //! Drives the scanning and parsing of the .mod file, and constructs its abstract representation
    /*! It is built along the guidelines given in Bison 2.3 manual. */
    class ParsingDriver
    {
    private:
      //! Checks that a given symbol exists, and stops with an error message if it doesn't
      void check_symbol_existence(const string &name);
    
      //! Checks that a given symbol exists and is a parameter, and stops with an error message if it isn't
      void check_symbol_is_parameter(string *name);
    
      //! Checks that a given symbol was assigned within a Statement
      void check_symbol_is_statement_variable(string *name);
    
      //! Checks that a given symbol exists and is a endogenous or exogenous, and stops with an error message if it isn't
      void check_symbol_is_endogenous_or_exogenous(string *name);
    
      //! Helper to add a symbol declaration
      void declare_symbol(const string *name, SymbolType type, const string *tex_name);
    
      //! Creates option "optim_opt" in OptionsList if it doesn't exist, else add a comma, and adds the option name
      void optim_options_helper(const string &name);
    
      //! Stores temporary symbol table
      SymbolList symbol_list;
    
      //! The data tree in which to add expressions currently parsed
      DataTree *data_tree;
    
      //! The model tree in which to add expressions currently parsed
      /*! It is only a dynamic cast of data_tree pointer, and is therefore null if data_tree is not a ModelTree instance */
      ModelTree *model_tree;
    
      //! The dynamic model tree in which to add expressions currently parsed
      /*! It is only a dynamic cast of data_tree pointer, and is therefore null if data_tree is not a DynamicModel instance */
      DynamicModel *dynamic_model;
    
      //! Sets data_tree and model_tree pointers
      void set_current_data_tree(DataTree *data_tree_arg);
    
      //! Stores options lists
      OptionsList options_list;
      //! Temporary storage for trend elements
      ObservationTrendsStatement::trend_elements_t trend_elements;
      //! Temporary storage for filename list of ModelComparison
      ModelComparisonStatement::filename_list_t filename_list;
      //! Temporary storage for list of EstimationParams (from estimated_params* statements)
      vector<EstimationParams> estim_params_list;
      //! Temporary storage of variances from optim_weights
      OptimWeightsStatement::var_weights_t var_weights;
      //! Temporary storage of covariances from optim_weights
      OptimWeightsStatement::covar_weights_t covar_weights;
      //! Temporary storage for deterministic shocks
      ShocksStatement::det_shocks_t det_shocks;
      //! Temporary storage for periods of deterministic shocks
      vector<pair<int, int> > det_shocks_periods;
      //! Temporary storage for values of deterministic shocks
      vector<expr_t> det_shocks_values;
      //! Temporary storage for perfect foresight of deterministic shocks in conditional forecast
      bool det_shocks_expectation_pf;
      //! Temporary storage for variances of shocks
      ShocksStatement::var_and_std_shocks_t var_shocks;
      //! Temporary storage for standard errors of shocks
      ShocksStatement::var_and_std_shocks_t std_shocks;
      //! Temporary storage for covariances of shocks
      ShocksStatement::covar_and_corr_shocks_t covar_shocks;
      //! Temporary storage for correlations of shocks
      ShocksStatement::covar_and_corr_shocks_t corr_shocks;
      //! Temporary storage for Sigma_e rows
      SigmaeStatement::row_t sigmae_row;
      //! Temporary storage for Sigma_e matrix
      SigmaeStatement::matrix_t sigmae_matrix;
      //! Temporary storage for initval/endval blocks
      InitOrEndValStatement::init_values_t init_values;
      //! Temporary storage for histval blocks
      HistValStatement::hist_values_t hist_values;
      //! Temporary storage for homotopy_setup blocks
      HomotopyStatement::homotopy_values_t homotopy_values;
      //! Temporary storage for svar_identification blocks
      SvarIdentificationStatement::svar_identification_restrictions_t svar_ident_restrictions;
      //! Temporary storage for mapping the equation number to the restrictions within an svar_identification block
      map<int, vector<int> > svar_equation_restrictions;
      //! Temporary storage for restrictions in an equation within an svar_identification block
      vector<int> svar_restriction_symbols;
      //! Temporary storage for constants exculsion within an svar_identification 
      bool svar_constants_exclusion;
      //! Temporary storage for upper cholesky within an svar_identification block
      bool svar_upper_cholesky;
      //! Temporary storage for lower cholesky within an svar_identification block
      bool svar_lower_cholesky;
      //! Temporary storage for equation number for a restriction within an svar_identification block
      int svar_equation_nbr;
      //! Temporary storage for left/right handside of a restriction equation within an svar_identificaton block
      bool svar_left_handside;
      //! Temporary storage for current restriction number in svar_identification block
      map<int,int> svar_Qi_restriction_nbr;
      map<int,int> svar_Ri_restriction_nbr;
      //! Temporary storage for restriction type
      enum SvarRestrictionType
        {
          NOT_SET,
          Qi_TYPE,
          Ri_TYPE
        };
      SvarRestrictionType svar_restriction_type;
    
      //! Temporary storage for argument list of external function
      stack<vector<expr_t> >  stack_external_function_args;
      //! Temporary storage for the symb_id associated with the "name" symbol of the current external_function statement
      int current_external_function_id;
      //! Temporary storage for option list provided to external_function()
      ExternalFunctionsTable::external_function_options current_external_function_options;
      //! Temporary storage for declaring trend variables
      vector<int> declared_trend_vars;
      //! Temporary storage for declaring nonstationary variables
      vector<int> declared_nonstationary_vars;
      //! Temporary storage for a variance declared in the prior statement
      expr_t prior_variance;
      SubsamplesStatement::subsample_declaration_map_t subsample_declaration_map;
      //! Temporary storage for subsample statement: map<pair<var_name1, var_name2>>, subsample_declaration_map >
      typedef map<pair<string, string >, SubsamplesStatement::subsample_declaration_map_t > subsample_declarations_t;
      subsample_declarations_t subsample_declarations;
      //! reset the values for temporary storage
      void reset_current_external_function_options();
      //! Adds a model lagged variable to ModelTree and VariableTable
      expr_t add_model_variable(int symb_id, int lag);
      //! For parsing the graph_format option
      SymbolList graph_formats;
    
      //! The mod file representation constructed by this ParsingDriver
      ModFile *mod_file;
    
      WarningConsolidation &warnings;
    
    public:
      ParsingDriver(WarningConsolidation &warnings_arg) : warnings(warnings_arg) { };
    
      //! Starts parsing, and constructs the MOD file representation
      /*! The returned pointer should be deleted after use */
      ModFile *parse(istream &in, bool debug);
    
      //! Reference to the lexer
      class DynareFlex *lexer;
    
      //! Copy of parsing location, maintained by YYLLOC_DEFAULT macro in DynareBison.yy
      Dynare::parser::location_type location;
    
      //! Estimation parameters
      EstimationParams estim_params;
    
      //! Temporary storage for the prior shape
      PriorDistributions prior_shape;
    
      //! Error handler with explicit location
      void error(const Dynare::parser::location_type &l, const string &m) __attribute__ ((noreturn));
      //! Error handler using saved location
      void error(const string &m) __attribute__ ((noreturn));
      //! Warning handler using saved location
      void warning(const string &m);
    
      //! Check if a given symbol exists in the parsing context, and is not a mod file local variable
      bool symbol_exists_and_is_not_modfile_local_or_external_function(const char *s);
      //! Sets mode of ModelTree class to use C output
      void use_dll();
      //! the modelis block decomposed
      void block();
      //! the model is stored in a binary file
      void byte_code();
      //! the static model is not computed
      void no_static();
      //! cutoff option of model block
      void cutoff(string *value);
      //! mfs option of model block
      void mfs(string *value);
      //! Sets the FILENAME for the initial value in initval
      void initval_file(string *filename);
      //! Declares an endogenous variable
      void declare_endogenous(string *name, string *tex_name = NULL);
      //! Declares an exogenous variable
      void declare_exogenous(string *name, string *tex_name = NULL);
      //! Declares an exogenous deterministic variable
      void declare_exogenous_det(string *name, string *tex_name = NULL);
      //! Declares a parameter
      void declare_parameter(string *name, string *tex_name = NULL);
      //! Declares a statement local variable
      void declare_statement_local_variable(string *name);
      //! Completes a subsample statement
      void set_subsamples(string *name1, string *name2);
      //! Declares a subsample, assigning the value to name
      void set_subsample_name_equal_to_date_range(string *name, string *date1, string *date2);
      //! Checks that a subsample statement (and given name) were provided for the pair name1 & name2
      void check_subsample_declaration_exists(string *name1, string *subsample_name);
      void check_subsample_declaration_exists(string *name1, string *name2, string *subsample_name);
      //! Copies the set of subsamples from_name to_name
      void copy_subsamples(string *to_name1, string *to_name2, string *from_name1, string *from_name2);
      //! Declares declare_optimal_policy_discount_factor as a parameter and initializes it to exprnode
      void declare_optimal_policy_discount_factor_parameter(expr_t exprnode);
      //! Adds a predetermined_variable
      void add_predetermined_variable(string *name);
      //! Declares and initializes a local parameter
      void declare_and_init_model_local_variable(string *name, expr_t rhs);
      //! Changes type of a symbol
      void change_type(SymbolType new_type, vector<string *> *var_list);
      //! Adds a list of tags for the current equation
      void add_equation_tags(string *key, string *value);
      //! Adds a non-negative constant to DataTree
      expr_t add_non_negative_constant(string *constant);
      //! Adds a NaN constant to DataTree
      expr_t add_nan_constant();
      //! Adds an Inf constant to DataTree
      expr_t add_inf_constant();
      //! Adds a model variable to ModelTree and VariableTable
      expr_t add_model_variable(string *name);
      //! Adds an Expression's variable
      expr_t add_expression_variable(string *name);
      //! Adds a "periods" statement
      void periods(string *periods);
      //! Adds a "dsample" statement
      void dsample(string *arg1);
      //! Adds a "dsample" statement
      void dsample(string *arg1, string *arg2);
      //! Writes parameter intitialisation expression
      void init_param(string *name, expr_t rhs);
      //! Writes an initval block
      void init_val(string *name, expr_t rhs);
      //! Writes an histval block
      void hist_val(string *name, string *lag, expr_t rhs);
      //! Adds an entry in a homotopy_setup block
      /*! Second argument "val1" can be NULL if no initial value provided */
      void homotopy_val(string *name, expr_t val1, expr_t val2);
      //! Writes end of an initval block
      void end_initval(bool all_values_required);
      //! Writes end of an endval block
      void end_endval(bool all_values_required);
      //! Writes end of an histval block
      void end_histval();
      //! Writes end of an homotopy_setup block
      void end_homotopy();
      //! Begin a model block
      void begin_model();
      //! Writes a shocks statement
      void end_shocks();
      //! Writes a mshocks statement
      void end_mshocks();
      //! Adds a deterministic chock or a path element inside a conditional_forecast_paths block
      void add_det_shock(string *var, bool conditional_forecast);
      //! Adds a std error chock
      void add_stderr_shock(string *var, expr_t value);
      //! Adds a variance chock
      void add_var_shock(string *var, expr_t value);
      //! Adds a covariance chock
      void add_covar_shock(string *var1, string *var2, expr_t value);
      //! Adds a correlated chock
      void add_correl_shock(string *var1, string *var2, expr_t value);
      //! Adds a shock period range
      void add_period(string *p1, string *p2);
      //! Adds a shock period
      void add_period(string *p1);
      //! Adds a deterministic shock value
      void add_value(expr_t value);
      //! Adds a deterministic shock value
      /*! \param v a string containing a (possibly negative) numeric constant */
      void add_value(string *v);
      //! Adds a expectation type for conditional forecast with deterministic simulation
      void add_expectation_pf(bool pf);
      //! Writes a Sigma_e block
      void do_sigma_e();
      //! Ends row of Sigma_e block
      void end_of_row();
      //! Adds a constant element to current row of Sigma_e
      void add_to_row_const(string *v);
      //! Adds an expression element to current row of Sigma_e
      void add_to_row(expr_t v);
      //! Write a steady command
      void steady();
      //! Sets an option to a numerical value
      void option_num(const string &name_option, string *opt);
      //! Sets an option to a numerical value
      void option_num(const string &name_option, const string &opt);
      //! Sets an option to a numerical value
      void option_num(const string &name_option, string *opt1, string *opt2);
      //! Sets an option to a string value
      void option_str(const string &name_option, string *opt);
      //! Sets an option to a string value
      void option_str(const string &name_option, const string &opt);
      //! Sets an option to a date value
      void option_date(const string &name_option, string *opt);
      //! Sets an option to a date value
      void option_date(const string &name_option, const string &opt);
      //! Sets an option to a list of symbols (used in conjunction with add_in_symbol_list())
      void option_symbol_list(const string &name_option);
      //! Sets an option to a vector of integers
      void option_vec_int(const string &name_option, const vector<int> *opt);
      //! Indicates that the model is linear
      void linear();
      //! Adds a variable to temporary symbol list
      void add_in_symbol_list(string *tmp_var);
      //! Writes a rplot() command
      void rplot();
      //! Writes a stock_simul command
      void stoch_simul();
      //! Writes a simul command
      void simul();
      //! Writes check command
      void check();
      //! Writes model_info command
      void model_info();
      //! Writes estimated params command
      void estimated_params();
      //! Writes estimated params init command
      void estimated_params_init();
      //! Writes estimated params bound command
      void estimated_params_bounds();
      //! Adds a declaration for a user-defined external function
      void external_function();
      //! Sets an external_function option to a string value
      void external_function_option(const string &name_option, string *opt);
      //! Sets an external_function option to a string value
      void external_function_option(const string &name_option, const string &opt);
      //! Add a line in an estimated params block
      void add_estimated_params_element();
      //! Sets the frequency of the data
      void set_time(string *arg);
      //! Estimation Data
      void estimation_data();
      //! Sets the prior for a parameter
      void set_prior(string *arg1, string *arg2);
      //! Adds the variance option to its temporary holding place
      void set_prior_variance(expr_t variance=NULL);
      //! Copies the prior from_name to_name
      void copy_prior(string *to_declaration_type, string *to_name1, string *to_name2, string *to_subsample_name,
                      string *from_declaration_type, string *from_name1, string *from_name2, string *from_subsample_name);
      //! Sets the options for a parameter
      void set_options(string *arg1, string *arg2);
      //! Copies the options from_name to_name
      void copy_options(string *to_declaration_type, string *to_name1, string *to_name2, string *to_subsample_name,
                        string *from_declaration_type, string *from_name1, string *from_name2, string *from_subsample_name);
      //! Sets the prior for estimated std dev
      void set_std_prior(string *arg1, string *arg2);
      //! Sets the options for estimated std dev
      void set_std_options(string *arg1, string *arg2);
      //! Sets the prior for estimated correlation
      void set_corr_prior(string *arg1, string *arg2, string *arg3);
     //! Sets the options for estimated correlation
      void set_corr_options(string *arg1, string *arg2, string *arg3);
      //! Runs estimation process
      void run_estimation();
      //! Runs dynare_sensitivy()
      void dynare_sensitivity();
      //! Adds an optimization option (string value)
      void optim_options_string(string *name, string *value);
      //! Adds an optimization option (numeric value)
      void optim_options_num(string *name, string *value);
      //! Check that no observed variable has yet be defined
      void check_varobs();
      //! Add a new observed variable
      void add_varobs(string *name);
      //! Svar_Identification Statement
      void begin_svar_identification();
      void end_svar_identification();
      //! Svar_Identification Statement: match list of restrictions and equation number with lag
      void combine_lag_and_restriction(string *lag);
      //! Svar_Identification Statement: match list of restrictions with equation number
      void add_restriction_in_equation(string *equation);
      //! Svar_Identification Statement: add list of restriction symbol ids
      void add_in_svar_restriction_symbols(string *name);
      //! Svar_Identification Statement: add exclusions of constants
      void add_constants_exclusion();
      //! Svar_Identification Statement: add equation number for following restriction equations
      void add_restriction_equation_nbr(string *eq_nbr);
      //! Svar_Identification Statement: record presence of equal sign
      void add_restriction_equal();
      //! Svar_Idenditification Statement: add coefficient of a linear restriction (positive value) 
      void add_positive_restriction_element(expr_t value, string *variable, string *lag);
      //! Svar_Idenditification Statement: add unit coefficient of a linear restriction 
      void add_positive_restriction_element(string *variable, string *lag);
      //! Svar_Idenditification Statement: add coefficient of a linear restriction (negative value) 
      void add_negative_restriction_element(expr_t value, string *variable, string *lag);
      //! Svar_Idenditification Statement: add negative unit coefficient of a linear restriction
      void add_negative_restriction_element(string *variable, string *lag);
      //! Svar_Idenditification Statement: add restriction element
      void add_restriction_element(expr_t value, string *variable, string *lag);
      //! Svar_Identification Statement: check that restriction is homogenous
      void check_restriction_expression_constant(expr_t value);
      //! Svar_Identification Statement: restriction of form upper cholesky
      void add_upper_cholesky();
      //! Svar_Identification Statement: restriction of form lower cholesky
      void add_lower_cholesky();
      //! Forecast Statement
      void forecast();
      void set_trends();
      void set_trend_element(string *arg1, expr_t arg2);
      void set_unit_root_vars();
      void optim_weights();
      void set_optim_weights(string *name, expr_t value);
      void set_optim_weights(string *name1, string *name2, expr_t value);
      void set_osr_params();
      void run_osr();
      void run_dynasave(string *filename);
      void run_dynatype(string *filename);
      void run_load_params_and_steady_state(string *filename);
      void run_save_params_and_steady_state(string *filename);
      void run_identification();
      void add_mc_filename(string *filename, string *prior = new string("1"));
      void run_model_comparison();
      //! Begin a planner_objective statement
      void begin_planner_objective();
      //! End a planner objective statement
      void end_planner_objective(expr_t expr);
      //! Ramsey policy statement
      void ramsey_policy();
      //! Discretionary policy statement
      void discretionary_policy();
      //! Adds a write_latex_dynamic_model statement
      void write_latex_dynamic_model();
      //! Adds a write_latex_static_model statement
      void write_latex_static_model();
      //! BVAR marginal density
      void bvar_density(string *maxnlags);
      //! BVAR forecast
      void bvar_forecast(string *nlags);
      //! SBVAR statement
      void sbvar();
      //! Markov Switching Statement: Estimation
      void ms_estimation();
      //! Markov Switching Statement: Simulation
      void ms_simulation();
      //! Markov Switching Statement: MDD
      void ms_compute_mdd();
      //! Markov Switching Statement: Probabilities
      void ms_compute_probabilities();
      //! Markov Switching Statement: IRF
      void ms_irf();
      //! Markov Switching Statement: Forecast
      void ms_forecast();
      //! Markov Switching Statement: Variance Decomposition
      void ms_variance_decomposition();
      //! Svar statement
      void svar();
      //! MarkovSwitching statement
      void markov_switching();
      //! Shock decomposition
      void shock_decomposition();
      //! Conditional forecast statement
      void conditional_forecast();
      //! Conditional forecast paths block
      void conditional_forecast_paths();
      //! Plot conditional forecast statement
      void plot_conditional_forecast(string *periods = NULL);
      //! Smoother on calibrated models
      void calib_smoother();
      //! Extended path
      void extended_path();
      //! Writes token "arg1=arg2" to model tree
      expr_t add_model_equal(expr_t arg1, expr_t arg2);
      //! Writes token "arg=0" to model tree
      expr_t add_model_equal_with_zero_rhs(expr_t arg);
      //! Writes token "arg1+arg2" to model tree
      expr_t add_plus(expr_t arg1, expr_t arg2);
      //! Writes token "arg1-arg2" to model tree
      expr_t add_minus(expr_t arg1,  expr_t arg2);
      //! Writes token "-arg1" to model tree
      expr_t add_uminus(expr_t arg1);
      //! Writes token "arg1*arg2" to model tree
      expr_t add_times(expr_t arg1,  expr_t arg2);
      //! Writes token "arg1/arg2" to model tree
      expr_t add_divide(expr_t arg1,  expr_t arg2);
      //! Writes token "arg1<arg2" to model tree
      expr_t add_less(expr_t arg1, expr_t arg2);
      //! Writes token "arg1>arg2" to model treeexpr_t
      expr_t add_greater(expr_t arg1, expr_t arg2);
      //! Writes token "arg1<=arg2" to model treeexpr_t
      expr_t add_less_equal(expr_t arg1, expr_t arg2);
      //! Writes token "arg1>=arg2" to model treeexpr_t
      expr_t add_greater_equal(expr_t arg1, expr_t arg2);
      //! Writes token "arg1==arg2" to model treeexpr_texpr_t
      expr_t add_equal_equal(expr_t arg1, expr_t arg2);
      //! Writes token "arg1!=arg2" to model treeexpr_texpr_t
      expr_t add_different(expr_t arg1, expr_t arg2);
      //! Writes token "arg1^arg2" to model tree
      expr_t add_power(expr_t arg1,  expr_t arg2);
      //! Writes token "E(arg1)(arg2)" to model tree
      expr_t add_expectation(string *arg1,  expr_t arg2);
      //! Writes token "exp(arg1)" to model tree
      expr_t add_exp(expr_t arg1);
      //! Writes token "log(arg1)" to model tree
      expr_t add_log(expr_t arg1);
      //! Writes token "log10(arg1)" to model tree
      expr_t add_log10(expr_t arg1);
      //! Writes token "cos(arg1)" to model tree
      expr_t add_cos(expr_t arg1);
      //! Writes token "sin(arg1)" to model tree
      expr_t add_sin(expr_t arg1);
      //! Writes token "tan(arg1)" to model tree
      expr_t add_tan(expr_t arg1);
      //! Writes token "acos(arg1)" to model tree
      expr_t add_acos(expr_t arg1);
      //! Writes token "asin(arg1)" to model tree
      expr_t add_asin(expr_t arg1);
      //! Writes token "atan(arg1)" to model tree
      expr_t add_atan(expr_t arg1);
      //! Writes token "cosh(arg1)" to model tree
      expr_t add_cosh(expr_t arg1);
      //! Writes token "sinh(arg1)" to model tree
      expr_t add_sinh(expr_t arg1);
      //! Writes token "tanh(arg1)" to model tree
      expr_t add_tanh(expr_t arg1);
      //! Writes token "acosh(arg1)" to model tree
      expr_t add_acosh(expr_t arg1);
      //! Writes token "asin(arg1)" to model tree
      expr_t add_asinh(expr_t arg1);
      //! Writes token "atanh(arg1)" to model tree
      expr_t add_atanh(expr_t arg1);
      //! Writes token "sqrt(arg1)" to model tree
      expr_t add_sqrt(expr_t arg1);
      //! Writes token "abs(arg1)" to model tree
      expr_t add_abs(expr_t arg1);
      //! Writes token "sign(arg1)" to model tree
      expr_t add_sign(expr_t arg1);
      //! Writes token "max(arg1,arg2)" to model tree
      expr_t add_max(expr_t arg1, expr_t arg2);
      //! Writes token "min(arg1,arg2)" to model tree
      expr_t add_min(expr_t arg1, expr_t arg2);
      //! Writes token "normcdf(arg1,arg2,arg3)" to model tree
      expr_t add_normcdf(expr_t arg1, expr_t arg2, expr_t arg3);
      //! Writes token "normcdf(arg,0,1)" to model tree
      expr_t add_normcdf(expr_t arg);
      //! Writes token "normpdf(arg1,arg2,arg3)" to model tree
      expr_t add_normpdf(expr_t arg1, expr_t arg2, expr_t arg3);
      //! Writes token "normpdf(arg,0,1)" to model tree
      expr_t add_normpdf(expr_t arg);
      //! Writes token "erf(arg)" to model tree
      expr_t add_erf(expr_t arg);
      //! Writes token "steadyState(arg1)" to model tree
      expr_t add_steady_state(expr_t arg1);
      //! Pushes empty vector onto stack when a symbol is encountered (mod_var or ext_fun)
      void push_external_function_arg_vector_onto_stack();
      //! Adds an external function argument
      void add_external_function_arg(expr_t arg);
      //! Adds an external function call node
      expr_t add_model_var_or_external_function(string *function_name, bool in_model_block);
      //! Adds a native statement
      void add_native(const string &s);
      //! Adds a native statement, first removing the set of characters passed in token (and everything after)
      void add_native_remove_charset(const char *s, const string &token);
      //! Resets data_tree and model_tree pointers to default (i.e. mod_file->expressions_tree)
      void reset_data_tree();
      //! Begin a steady_state_model block
      void begin_steady_state_model();
      //! Add an assignment equation in steady_state_model block
      void add_steady_state_model_equal(string *varname, expr_t expr);
      //! Add a multiple assignment equation in steady_state_model block
      void add_steady_state_model_equal_multiple(expr_t expr);
      //! Switches datatree
      void begin_trend();
      //! Declares a trend variable with its growth factor
      void declare_trend_var(bool log_trend, string *name, string *tex_name = NULL);
      //! Ends declaration of trend variable
      void end_trend_var(expr_t growth_factor);
      //! Declares a nonstationary variable with its deflator
      void declare_nonstationary_var(string *name, string *tex_name = NULL);
      //! Ends declaration of nonstationary variable
      void end_nonstationary_var(bool log_deflator, expr_t deflator);
      //! Add a graph format to the list of formats requested
      void add_graph_format(const string &name);
      //! Add the graph_format option to the OptionsList structure
      void process_graph_format_option();
      //! Model diagnostics
      void model_diagnostics();
    };
    
    #endif // ! PARSING_DRIVER_HH