add nonstationary option to stoch_simul

src/DynareBison.yy

@@ -216,6 +216,7 @@ str_tolower(string s)
 %token MAX_NROWS SQUEEZE_SHOCK_DECOMPOSITION WITH_EPILOGUE MODEL_REMOVE MODEL_REPLACE MODEL_OPTIONS
 %token VAR_REMOVE ESTIMATED_PARAMS_REMOVE BLOCK_STATIC BLOCK_DYNAMIC INCIDENCE RESID NON_ZERO LEARNT_IN PLUS_EQUAL TIMES_EQUAL
 %token FSOLVE_OPTIONS
+%token NONSTATIONARY
 %token ENDVAL_STEADY STEADY_SOLVE_ALGO STEADY_MAXIT STEADY_TOLF STEADY_TOLX STEADY_MARKOWITZ
 %token HOMOTOPY_MAX_COMPLETION_SHARE HOMOTOPY_MIN_STEP_SIZE HOMOTOPY_INITIAL_STEP_SIZE HOMOTOPY_STEP_SIZE_INCREASE_SUCCESS_COUNT
 %token HOMOTOPY_LINEARIZATION_FALLBACK HOMOTOPY_MARGINAL_LINEARIZATION_FALLBACK HOMOTOPY_EXCLUDE_VAREXO FROM_INITVAL_TO_ENDVAL
@@ -1860,6 +1861,7 @@ stoch_simul_primary_options : o_solve_algo
                             | o_irf_plot_threshold
                             | o_dr_display_tol
                             | o_tex
+                            | o_nonstationary
                             ;
 
 stoch_simul_options : stoch_simul_primary_options
@@ -4523,6 +4525,9 @@ o_occbin_write_regimes_simul : SIMUL { driver.option_str("write_regimes.type", "
 // Some options to "occbin_graph"
 o_occbin_graph_noconstant : NOCONSTANT { driver.option_num("graph.steady_state", "false"); };
 
+// options used by DynareJulila
+o_nonstationary : NONSTATIONARY { driver.option_num("nonstationary", "true"); };
+
 range : symbol ':' symbol
         { $$ = $1 + ':' + $3; }
 

src/DynareFlex.ll

@@ -762,6 +762,7 @@ DATE -?[0-9]+([ya]|m([1-9]|1[0-2])|q[1-4]|[sh][12])
 <DYNARE_STATEMENT>iterstack_nlu {return token::ITERSTACK_NLU;}
 <DYNARE_STATEMENT>iterstack_relu {return token::ITERSTACK_RELU;}
 <DYNARE_STATEMENT>check_jacobian_singularity {return token::CHECK_JACOBIAN_SINGULARITY;}
+<DYNARE_STATEMENT>nonstationary {return token::NONSTATIONARY;}
 
 <DYNARE_STATEMENT>\$[^$]*\$ {
   yylval->emplace<string>(yytext + 1).pop_back();