Mercurial > jwe > octave
view test/bug-31371.tst @ 31110:670a0d878af1
eliminate WHO arguments from interpreter-private functions
* interpreter-private.h, inpterpreter-private.cc (__get_interpreter__,
__get_dynamic_loader__, __get_error_system__, __get_gh_manager__,
__get_help_system__, __get_input_system__, __get_load_path__,
__get_load_save_system__, __get_event_manager__,
__get_output_system__, __get_type_info__, __get_symbol_table__,
__get_current_scope__, __require_current_scope__, __get_evaluator__,
__get_bp_table__, __get_child_list__, __get_cdef_manager__,
__get_display_info__, __get_gtk_manager__): Eliminate WHO argument.
Previously, it was never displayed by __get_interpreter__. And, as
pointed out by Petter Tomner in patch #10216, passing a std::string
object could have performance issues.
(__get_interpreter__): Eliminate useless call to error. Display
message to std::cerr then abort.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Wed, 22 Jun 2022 12:48:59 -0400 |
parents | 796f54d4ddbf |
children |
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######################################################################## ## ## Copyright (C) 2012-2022 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave 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. ## ## Octave 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 Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## %!test <*31371> %! % Work around MATLAB bug where f(x)(y) is invalid syntax %! % (This bug does not apply to Octave) %! %! C = @(fcn,x) fcn(x); %! C2 = @(fcn,x,y) fcn(x,y); %! %! % Church Booleans %! T = @(t,f) t; %! F = @(t,f) f; %! %! % Church Numerals %! Zero = @(fcn,x) x; %! One = @(fcn,x) fcn(x); %! Two = @(fcn,x) fcn(fcn(x)); %! Three = @(fcn,x) fcn(fcn(fcn(x))); %! Four = @(fcn,x) fcn(fcn(fcn(fcn(x)))); %! %! % Arithmetic Operations %! Inc = @(a) @(f,x) f(a(f,x)); % Increment %! Add = @(a,b) @(f,x) a(f,b(f,x)); %! Mult = @(a,b) @(f,x) a(@(x) b(f,x),x); %! Dec = @(a) @(f,x) C(a(@(g) @(h) h(g(f)), @(u) x), @(u) u); % Decrement %! Sub = @(a,b) b(Dec, a); %! %! % Renderer - Convert church numeral to "real" number %! Render = @(n) n(@(n) n+1,0); %! %! % Predicates %! Iszero = @(n) n(@(x) F, T); %! %! % Y combinator implements recursion %! Ycomb = @(f) C(@(g) f(@(x) C(g(g), x)), ... %! @(g) f(@(x) C(g(g), x))); %! %! Factorial = Ycomb(@(f) @(n) C(C2(Iszero(n), ... %! @(d) One, @(d) Mult(n, f(Dec(n)))),0)); %! %! assert (Render (Factorial (Two)), 2); %! assert (Render (Factorial (Three)), 6); %! assert (Render (Factorial (Four)), 24);