Mercurial > octave
diff src/symtab.cc @ 9444:0c785ad961fa
improve behavior of builtin
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 21 Jul 2009 12:43:33 -0400 |
parents | 8f9d8776d11c |
children | c5f03874ea2a |
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--- a/src/symtab.cc Tue Jul 21 12:49:17 2009 -0400 +++ b/src/symtab.cc Tue Jul 21 12:43:33 2009 -0400 @@ -724,6 +724,141 @@ return built_in_function; } +// Find the definition of NAME according to the following precedence +// list: +// +// built-in function +// function on the path +// autoload function +// command-line function +// private function +// subfunction + +// This function is used to implement the "builtin" function, which +// searches for "built-in" functions. In Matlab, "builtin" only +// returns functions that are actually built-in to the interpreter. +// But since the list of built-in functions is different in Octave and +// Matlab, we also search up the precedence list until we find +// something that matches. Note that we are only searching by name, +// so class methods, constructors, and legacy dispatch functions are +// skipped. + +octave_value +symbol_table::fcn_info::fcn_info_rep::builtin_find (void) +{ + octave_value retval = x_builtin_find (); + + if (! retval.is_defined ()) + { + // It is possible that the user created a file on the fly since + // the last prompt or chdir, so try updating the load path and + // searching again. + + load_path::update (); + + retval = x_builtin_find (); + } + + return retval; +} + +octave_value +symbol_table::fcn_info::fcn_info_rep::x_builtin_find (void) +{ + // Built-in function. + if (built_in_function.is_defined ()) + return built_in_function; + + // Function on the path. + + octave_value fcn = find_user_function (); + + if (fcn.is_defined ()) + return fcn; + + // Autoload? + + fcn = find_autoload (); + + if (fcn.is_defined ()) + return fcn; + + // Command-line function. + + if (cmdline_function.is_defined ()) + return cmdline_function; + + // Private function. + + octave_function *curr_fcn = octave_call_stack::current (); + + if (curr_fcn) + { + std::string dir_name = curr_fcn->dir_name (); + + if (! dir_name.empty ()) + { + str_val_iterator q = private_functions.find (dir_name); + + if (q == private_functions.end ()) + { + octave_value val = load_private_function (dir_name); + + if (val.is_defined ()) + return val; + } + else + { + octave_value& fval = q->second; + + if (fval.is_defined ()) + out_of_date_check_internal (fval); + + if (fval.is_defined ()) + return fval; + else + { + octave_value val = load_private_function (dir_name); + + if (val.is_defined ()) + return val; + } + } + } + } + + // Subfunction. I think it only makes sense to check for + // subfunctions if we are currently executing a function defined + // from a .m file. + + scope_val_iterator r = subfunctions.find (xcurrent_scope); + + if (r != subfunctions.end ()) + { + // FIXME -- out-of-date check here. + + return r->second; + } + else if (curr_fcn) + { + scope_id pscope = curr_fcn->parent_fcn_scope (); + + if (pscope > 0) + { + r = subfunctions.find (pscope); + + if (r != subfunctions.end ()) + { + // FIXME -- out-of-date check here. + + return r->second; + } + } + } + + return octave_value (); +} + octave_value symbol_table::fcn_info::fcn_info_rep::find_method (const std::string& dispatch_type) { @@ -968,6 +1103,14 @@ } octave_value +symbol_table::builtin_find (const std::string& name) +{ + symbol_table *inst = get_instance (xcurrent_scope); + + return inst ? inst->do_builtin_find (name) : octave_value (); +} + +octave_value symbol_table::find_function (const std::string& name, tree_argument_list *args, const string_vector& arg_names, octave_value_list& evaluated_args, @@ -1172,6 +1315,30 @@ return retval; } +octave_value +symbol_table::do_builtin_find (const std::string& name) +{ + octave_value retval; + + fcn_table_iterator p = fcn_table.find (name); + + if (p != fcn_table.end ()) + return p->second.builtin_find (); + else + { + fcn_info finfo (name); + + octave_value fcn = finfo.builtin_find (); + + if (fcn.is_defined ()) + fcn_table[name] = finfo; + + return fcn; + } + + return retval; +} + void symbol_table::do_dump (std::ostream& os) {