expr mk_choice(unsigned num_es, expr const * es) { lean_assert(num_es > 0); if (num_es == 1) return es[0]; else return mk_macro(*g_choice, num_es, es); }
expr update_macro(expr const & e, unsigned num, expr const * args) { if (num == macro_num_args(e)) { unsigned i = 0; for (i = 0; i < num; i++) { if (!is_eqp(macro_arg(e, i), args[i])) break; } if (i == num) return e; } return mk_macro(to_macro(e)->m_definition, num, args, e.get_tag()); }
sexpr_t* eval(sexpr_t* sexpr, sexpr_t** env, sexpr_list_t* roots, error_t** error) { if(sexpr == NULL) { return interp.nil_sym; } /* printf("[eval]\n"); */ /* print_sexpr(sexpr); */ /* printf("\n"); */ roots = cons_to_roots_list(roots, sexpr); gc_collect(roots); if(ATOM(sexpr)) { if(SYM(sexpr)) { if(interp.t_sym == sexpr) { return interp.t_sym; } if(interp.nil_sym == sexpr) { return interp.nil_sym; } sexpr_t* val = assoc(sexpr, *env); if(val == NULL) { *error = mk_error("Undefined symbol", SYM_VAL(sexpr)); } return val; } if(INT(sexpr)) { return sexpr; } } else if(ATOM(CAR(sexpr))) { if(SYM(CAR(sexpr))) { // quote if(interp.quote_sym == CAR(sexpr)) { if(CDR(sexpr) == NULL) { *error = mk_error("Missing quote argument", ""); return NULL; } if(CDR(CDR(sexpr)) != NULL) { *error = mk_error("Too many arguments for quote", ""); return NULL; } return CAR(CDR(sexpr)); } // atom if(interp.atom_sym == CAR(sexpr)) { if(ATOM(eval(CAR(CDR(sexpr)), env, roots, error))) { return interp.t_sym; } return interp.nil_sym; } // eq if(interp.eq_sym == CAR(sexpr)) { // TODO check nb args sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } roots = cons_to_roots_list(roots, e1); sexpr_t* e2 = eval(CAR(CDR(CDR(sexpr))), env, roots, error); if(*error != NULL) { return NULL; } if(INT(e1) && INT(e2)) { if(INT_VAL(e1) == INT_VAL(e2)) { return interp.t_sym; } return interp.nil_sym; } if(e1 == e2) { return interp.t_sym; } return interp.nil_sym; } // if if(interp.if_sym == CAR(sexpr)) { sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } if(e1 == interp.nil_sym) { return eval(CAR(CDR(CDR(CDR(sexpr)))), env, roots, error); } else { return eval(CAR(CDR(CDR(sexpr))), env, roots, error); } } // car if(interp.car_sym == CAR(sexpr)) { sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } if(e1 == interp.nil_sym) { return interp.nil_sym; } return CAR(e1); } // cdr if(interp.cdr_sym == CAR(sexpr)) { sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } if(e1 == interp.nil_sym) { return interp.nil_sym; } sexpr_t *res = CDR(e1); if(res == NULL) { return interp.nil_sym; } return res; } // + if(interp.plus_sym == CAR(sexpr)) { sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } roots = cons_to_roots_list(roots, e1); sexpr_t* e2 = eval(CAR(CDR(CDR(sexpr))), env, roots, error); if(*error != NULL) { return NULL; } if(INT(e1) && INT(e2)) { return mk_int(INT_VAL(e1) + INT_VAL(e2)); } *error = mk_error("Arguments for '+' are not integers", ""); return NULL; } // - if(interp.minus_sym == CAR(sexpr)) { sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } roots = cons_to_roots_list(roots, e1); sexpr_t* e2 = eval(CAR(CDR(CDR(sexpr))), env, roots, error); if(*error != NULL) { return NULL; } if(INT(e1) && INT(e2)) { return mk_int(INT_VAL(e1) - INT_VAL(e2)); } *error = mk_error("Arguments for '-' are not integers", ""); return NULL; } if(interp.mul_sym == CAR(sexpr)) { sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } roots = cons_to_roots_list(roots, sexpr); sexpr_t* e2 = eval(CAR(CDR(CDR(sexpr))), env, roots, error); if(*error != NULL) { return NULL; } if(INT(e1) && INT(e2)) { return mk_int(INT_VAL(e1) * INT_VAL(e2)); } *error = mk_error("Arguments for '*' are not integers", ""); return NULL; } // cons if(interp.cons_sym == CAR(sexpr)) { sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } roots = cons_to_roots_list(roots, e1); sexpr_t* e2 = eval(CAR(CDR(CDR(sexpr))), env, roots, error); if(*error != NULL) { return NULL; } return mk_cons(e1 == interp.nil_sym ? NULL : e1, e2 == interp.nil_sym ? NULL : e2); } // def if(interp.def_sym == CAR(sexpr)) { sexpr_t* arg = CAR(CDR(CDR(sexpr))); roots = cons_to_roots_list(roots, arg); sexpr_t* val = eval(arg, env, roots, error); if(*error != NULL) { return NULL; } *env = mk_cons(mk_cons(intern(SYM_VAL(CAR(CDR(sexpr)))), val), *env); return val; } // print if(interp.print_sym == CAR(sexpr)) { sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } print_sexpr(e1); printf("\n"); return e1; } // fn if(interp.fn_sym == CAR(sexpr)) { return mk_fn(sexpr, *env); } // macro if(interp.macro_sym == CAR(sexpr)) { return mk_macro(sexpr); } //eval if(interp.eval_sym == CAR(sexpr)) { sexpr_t* e1 = eval(CAR(CDR(sexpr)), env, roots, error); if(*error != NULL) { return NULL; } roots = cons_to_roots_list(roots, e1); return eval(e1, env, roots, error); } // else resolves first variable sexpr_t* fn = eval(CAR(sexpr), env, roots, error); if(*error != NULL) { return NULL; } // eval fn if(FN(fn)) { sexpr_t* fn_code = CAR(CDR(CDR(CAR(fn)))); sexpr_t* captured_env = CDR(fn); sexpr_t* arguments = eval_list(CDR(sexpr), env, roots, error); if(*error != NULL) { return NULL; } sexpr_t* pairs = pair(CAR(CDR(CAR(fn))), arguments); sexpr_t* eval_env = append(pairs, captured_env); // append the function itself to the env, roots, for recursive calls eval_env = mk_cons(mk_cons(CAR(sexpr), fn), eval_env); /* printf("fn code=\n"); */ /* print_sexpr(fn_code); */ /* printf("\n"); */ roots = cons_to_roots_list(roots, eval_env); return eval(fn_code, &eval_env, roots, error); } // eval macro if(MACRO(fn)) { sexpr_t* macro_code = CAR(CDR(CDR(CAR(fn)))); sexpr_t* pairs = pair(CAR(CDR(CAR(fn))), CDR(sexpr)); sexpr_t* eval_env = append(pairs, *env); roots = cons_to_roots_list(roots, eval_env); sexpr_t* transformed_code = eval(macro_code, &eval_env, roots, error); if(*error != NULL) { return NULL; } return eval(transformed_code, env, roots, error); } // else primitives sexpr_t* arguments = eval_list(CDR(sexpr), env, roots, error); if(*error != NULL) { return NULL; } sexpr_t* to_eval = mk_cons(fn, arguments); return eval(to_eval, env, roots, error); } } else if(CAR(CAR(sexpr)) == interp.fn_sym) { // executes an anonymous function sexpr_t* fn = CAR(sexpr); sexpr_t* fn_code = CAR(CDR(CDR(fn))); sexpr_t* arguments = eval_list(CDR(sexpr), env, roots, error); if(*error != NULL) { return NULL; } sexpr_t* l = pair(CAR(CDR(fn)), arguments); l = append(l, *env); roots = cons_to_roots_list(roots, l); return eval(fn_code, &l, roots, error); } print_sexpr(sexpr); printf("\n"); *error = mk_error("Invalid expression", ""); return NULL; }
expr mk_string_macro(std::string const & v) { return mk_macro(macro_definition(new string_macro(v))); }
expr update_nested_declaration(expr const & e, expr const & new_d) { lean_assert(is_nested_declaration(e)); return mk_macro(macro_def(e), 1, &new_d); }
expr mk_prenum(mpz const & v) { return mk_macro(macro_definition(new prenum_macro_definition_cell(v)), 0, nullptr); }
expr mk_let_macro(name const & n, expr const & v, expr const & b) { auto d = macro_definition(new let_macro_definition_cell(n)); expr args[2] = {v, b}; return mk_macro(d, 2, args); }
static expr mk_structure_instance_core(name const & s, list<name> const & fs, unsigned num, expr const * args) { lean_assert(num == length(fs) || num == length(fs) + 1); macro_definition def(new structure_instance_macro_cell(s, fs)); return mk_macro(def, num, args); }
static expr mk_projection_macro(name const & I, name const & c, name const & p, unsigned i, level_param_names const & ps, expr const & type, expr const & val, expr const & arg) { macro_definition m(new projection_macro_definition_cell(I, c, p, i, ps, type, val)); return mk_macro(m, 1, &arg); }
expr mk_resolve_macro(expr const & l, expr const & H1, expr const & H2) { expr args[3] = {l, H1, H2}; return mk_macro(*g_resolve_macro_definition, 3, args); }
expr mk_options_expr(options const & loc) { macro_definition def(new options_macro_cell(loc)); return mk_macro(def); }
expr mk_typed_expr(expr const & t, expr const & v) { expr args[2] = {t, v}; return mk_macro(*g_typed_expr, 2, args); }