Mercurial > octave
view libinterp/corefcn/stack-frame.h @ 31605:e88a07dec498 stable
maint: Use macros to begin/end C++ namespaces.
* oct-conf-post-public.in.h: Define two macros (OCTAVE_BEGIN_NAMESPACE,
OCTAVE_END_NAMESPACE) that can be used to start/end a namespace.
* mk-opts.pl, build-env.h, build-env.in.cc, __betainc__.cc, __contourc__.cc,
__dsearchn__.cc, __eigs__.cc, __expint__.cc, __ftp__.cc, __gammainc__.cc,
__ichol__.cc, __ilu__.cc, __isprimelarge__.cc, __lin_interpn__.cc,
__magick_read__.cc, __pchip_deriv__.cc, __qp__.cc, amd.cc, auto-shlib.cc,
auto-shlib.h, balance.cc, base-text-renderer.cc, base-text-renderer.h,
besselj.cc, bitfcns.cc, bsxfun.cc, c-file-ptr-stream.cc, c-file-ptr-stream.h,
call-stack.cc, call-stack.h, ccolamd.cc, cellfun.cc, chol.cc, colamd.cc,
colloc.cc, conv2.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, data.h, debug.cc,
defaults.cc, defaults.h, defun-int.h, defun.cc, det.cc, dirfns.cc, display.cc,
display.h, dlmread.cc, dmperm.cc, dot.cc, dynamic-ld.cc, dynamic-ld.h, eig.cc,
ellipj.cc, environment.cc, environment.h, error.cc, error.h, errwarn.h,
event-manager.cc, event-manager.h, event-queue.cc, event-queue.h, fcn-info.cc,
fcn-info.h, fft.cc, fft2.cc, fftn.cc, file-io.cc, filter.cc, find.cc,
ft-text-renderer.cc, ft-text-renderer.h, gcd.cc, getgrent.cc, getpwent.cc,
getrusage.cc, givens.cc, gl-render.cc, gl-render.h, gl2ps-print.cc,
gl2ps-print.h, graphics-toolkit.cc, graphics-toolkit.h, graphics.cc,
graphics.in.h, gsvd.cc, gtk-manager.cc, gtk-manager.h, hash.cc, help.cc,
help.h, hess.cc, hex2num.cc, hook-fcn.cc, hook-fcn.h, input.cc, input.h,
interpreter-private.cc, interpreter-private.h, interpreter.cc, interpreter.h,
inv.cc, jsondecode.cc, jsonencode.cc, kron.cc, latex-text-renderer.cc,
latex-text-renderer.h, load-path.cc, load-path.h, load-save.cc, load-save.h,
lookup.cc, ls-ascii-helper.cc, ls-ascii-helper.h, ls-oct-text.cc, ls-utils.cc,
ls-utils.h, lsode.cc, lu.cc, mappers.cc, matrix_type.cc, max.cc, mex-private.h,
mex.cc, mgorth.cc, nproc.cc, oct-fstrm.cc, oct-fstrm.h, oct-hdf5-types.cc,
oct-hdf5-types.h, oct-hist.cc, oct-hist.h, oct-iostrm.cc, oct-iostrm.h,
oct-opengl.h, oct-prcstrm.cc, oct-prcstrm.h, oct-procbuf.cc, oct-procbuf.h,
oct-process.cc, oct-process.h, oct-stdstrm.h, oct-stream.cc, oct-stream.h,
oct-strstrm.cc, oct-strstrm.h, oct-tex-lexer.in.ll, oct-tex-parser.yy,
ordqz.cc, ordschur.cc, pager.cc, pager.h, pinv.cc, pow2.cc, pr-flt-fmt.cc,
pr-output.cc, procstream.cc, procstream.h, psi.cc, qr.cc, quad.cc, quadcc.cc,
qz.cc, rand.cc, rcond.cc, regexp.cc, schur.cc, settings.cc, settings.h,
sighandlers.cc, sighandlers.h, sparse-xdiv.cc, sparse-xdiv.h, sparse-xpow.cc,
sparse-xpow.h, sparse.cc, spparms.cc, sqrtm.cc, stack-frame.cc, stack-frame.h,
stream-euler.cc, strfind.cc, strfns.cc, sub2ind.cc, svd.cc, sylvester.cc,
symbfact.cc, syminfo.cc, syminfo.h, symrcm.cc, symrec.cc, symrec.h,
symscope.cc, symscope.h, symtab.cc, symtab.h, syscalls.cc, sysdep.cc, sysdep.h,
text-engine.cc, text-engine.h, text-renderer.cc, text-renderer.h, time.cc,
toplev.cc, tril.cc, tsearch.cc, typecast.cc, url-handle-manager.cc,
url-handle-manager.h, urlwrite.cc, utils.cc, utils.h, variables.cc,
variables.h, xdiv.cc, xdiv.h, xnorm.cc, xnorm.h, xpow.cc, xpow.h,
__delaunayn__.cc, __fltk_uigetfile__.cc, __glpk__.cc, __init_fltk__.cc,
__init_gnuplot__.cc, __ode15__.cc, __voronoi__.cc, audiodevinfo.cc,
audioread.cc, convhulln.cc, fftw.cc, gzip.cc, mk-build-env-features.sh,
mk-builtins.pl, cdef-class.cc, cdef-class.h, cdef-fwd.h, cdef-manager.cc,
cdef-manager.h, cdef-method.cc, cdef-method.h, cdef-object.cc, cdef-object.h,
cdef-package.cc, cdef-package.h, cdef-property.cc, cdef-property.h,
cdef-utils.cc, cdef-utils.h, ov-base.cc, ov-base.h, ov-bool-mat.cc,
ov-builtin.h, ov-cell.cc, ov-class.cc, ov-class.h, ov-classdef.cc,
ov-classdef.h, ov-complex.cc, ov-fcn-handle.cc, ov-fcn-handle.h, ov-fcn.h,
ov-java.cc, ov-java.h, ov-mex-fcn.h, ov-null-mat.cc, ov-oncleanup.cc,
ov-struct.cc, ov-typeinfo.cc, ov-typeinfo.h, ov-usr-fcn.cc, ov-usr-fcn.h,
ov.cc, ov.h, octave.cc, octave.h, mk-ops.sh, op-b-b.cc, op-b-bm.cc,
op-b-sbm.cc, op-bm-b.cc, op-bm-bm.cc, op-bm-sbm.cc, op-cdm-cdm.cc, op-cell.cc,
op-chm.cc, op-class.cc, op-cm-cm.cc, op-cm-cs.cc, op-cm-m.cc, op-cm-s.cc,
op-cm-scm.cc, op-cm-sm.cc, op-cs-cm.cc, op-cs-cs.cc, op-cs-m.cc, op-cs-s.cc,
op-cs-scm.cc, op-cs-sm.cc, op-dm-dm.cc, op-dm-scm.cc, op-dm-sm.cc,
op-dm-template.cc, op-dms-template.cc, op-fcdm-fcdm.cc, op-fcm-fcm.cc,
op-fcm-fcs.cc, op-fcm-fm.cc, op-fcm-fs.cc, op-fcn.cc, op-fcs-fcm.cc,
op-fcs-fcs.cc, op-fcs-fm.cc, op-fcs-fs.cc, op-fdm-fdm.cc, op-fm-fcm.cc,
op-fm-fcs.cc, op-fm-fm.cc, op-fm-fs.cc, op-fs-fcm.cc, op-fs-fcs.cc,
op-fs-fm.cc, op-fs-fs.cc, op-i16-i16.cc, op-i32-i32.cc, op-i64-i64.cc,
op-i8-i8.cc, op-int-concat.cc, op-m-cm.cc, op-m-cs.cc, op-m-m.cc, op-m-s.cc,
op-m-scm.cc, op-m-sm.cc, op-mi.cc, op-pm-pm.cc, op-pm-scm.cc, op-pm-sm.cc,
op-pm-template.cc, op-range.cc, op-s-cm.cc, op-s-cs.cc, op-s-m.cc, op-s-s.cc,
op-s-scm.cc, op-s-sm.cc, op-sbm-b.cc, op-sbm-bm.cc, op-sbm-sbm.cc,
op-scm-cm.cc, op-scm-cs.cc, op-scm-m.cc, op-scm-s.cc, op-scm-scm.cc,
op-scm-sm.cc, op-sm-cm.cc, op-sm-cs.cc, op-sm-m.cc, op-sm-s.cc, op-sm-scm.cc,
op-sm-sm.cc, op-str-m.cc, op-str-s.cc, op-str-str.cc, op-struct.cc,
op-ui16-ui16.cc, op-ui32-ui32.cc, op-ui64-ui64.cc, op-ui8-ui8.cc, ops.h,
anon-fcn-validator.cc, anon-fcn-validator.h, bp-table.cc, bp-table.h,
comment-list.cc, comment-list.h, filepos.h, lex.h, lex.ll, oct-lvalue.cc,
oct-lvalue.h, oct-parse.yy, parse.h, profiler.cc, profiler.h,
pt-anon-scopes.cc, pt-anon-scopes.h, pt-arg-list.cc, pt-arg-list.h,
pt-args-block.cc, pt-args-block.h, pt-array-list.cc, pt-array-list.h,
pt-assign.cc, pt-assign.h, pt-binop.cc, pt-binop.h, pt-bp.cc, pt-bp.h,
pt-cbinop.cc, pt-cbinop.h, pt-cell.cc, pt-cell.h, pt-check.cc, pt-check.h,
pt-classdef.cc, pt-classdef.h, pt-cmd.h, pt-colon.cc, pt-colon.h, pt-const.cc,
pt-const.h, pt-decl.cc, pt-decl.h, pt-eval.cc, pt-eval.h, pt-except.cc,
pt-except.h, pt-exp.cc, pt-exp.h, pt-fcn-handle.cc, pt-fcn-handle.h, pt-id.cc,
pt-id.h, pt-idx.cc, pt-idx.h, pt-jump.h, pt-loop.cc, pt-loop.h, pt-mat.cc,
pt-mat.h, pt-misc.cc, pt-misc.h, pt-pr-code.cc, pt-pr-code.h, pt-select.cc,
pt-select.h, pt-spmd.cc, pt-spmd.h, pt-stmt.cc, pt-stmt.h, pt-tm-const.cc,
pt-tm-const.h, pt-unop.cc, pt-unop.h, pt-vm-eval.cc, pt-walk.cc, pt-walk.h,
pt.cc, pt.h, token.cc, token.h, Range.cc, Range.h, idx-vector.cc, idx-vector.h,
range-fwd.h, CollocWt.cc, CollocWt.h, aepbalance.cc, aepbalance.h, chol.cc,
chol.h, gepbalance.cc, gepbalance.h, gsvd.cc, gsvd.h, hess.cc, hess.h,
lo-mappers.cc, lo-mappers.h, lo-specfun.cc, lo-specfun.h, lu.cc, lu.h,
oct-convn.cc, oct-convn.h, oct-fftw.cc, oct-fftw.h, oct-norm.cc, oct-norm.h,
oct-rand.cc, oct-rand.h, oct-spparms.cc, oct-spparms.h, qr.cc, qr.h, qrp.cc,
qrp.h, randgamma.cc, randgamma.h, randmtzig.cc, randmtzig.h, randpoisson.cc,
randpoisson.h, schur.cc, schur.h, sparse-chol.cc, sparse-chol.h, sparse-lu.cc,
sparse-lu.h, sparse-qr.cc, sparse-qr.h, svd.cc, svd.h, child-list.cc,
child-list.h, dir-ops.cc, dir-ops.h, file-ops.cc, file-ops.h, file-stat.cc,
file-stat.h, lo-sysdep.cc, lo-sysdep.h, lo-sysinfo.cc, lo-sysinfo.h,
mach-info.cc, mach-info.h, oct-env.cc, oct-env.h, oct-group.cc, oct-group.h,
oct-password.cc, oct-password.h, oct-syscalls.cc, oct-syscalls.h, oct-time.cc,
oct-time.h, oct-uname.cc, oct-uname.h, action-container.cc, action-container.h,
base-list.h, cmd-edit.cc, cmd-edit.h, cmd-hist.cc, cmd-hist.h, f77-fcn.h,
file-info.cc, file-info.h, lo-array-errwarn.cc, lo-array-errwarn.h, lo-hash.cc,
lo-hash.h, lo-ieee.h, lo-regexp.cc, lo-regexp.h, lo-utils.cc, lo-utils.h,
oct-base64.cc, oct-base64.h, oct-glob.cc, oct-glob.h, oct-inttypes.h,
oct-mutex.cc, oct-mutex.h, oct-refcount.h, oct-shlib.cc, oct-shlib.h,
oct-sparse.cc, oct-sparse.h, oct-string.h, octave-preserve-stream-state.h,
pathsearch.cc, pathsearch.h, quit.cc, quit.h, unwind-prot.cc, unwind-prot.h,
url-transfer.cc, url-transfer.h : Use new macros to begin/end C++ namespaces.
author | Rik <rik@octave.org> |
---|---|
date | Thu, 01 Dec 2022 14:23:45 -0800 |
parents | 796f54d4ddbf |
children | aac27ad79be6 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1993-2022 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/>. // //////////////////////////////////////////////////////////////////////// #if ! defined (octave_stack_frame_h) #define octave_stack_frame_h 1 #include "octave-config.h" #include <deque> #include <iosfwd> #include <list> #include <map> #include <memory> #include <string> class octave_value; class octave_value_list; #include "error.h" #include "ov-fcn.h" #include "ov-usr-fcn.h" #include "syminfo.h" #include "symscope.h" // Variable values are stored in the stack_frame objects that make up // the call_stack. There are four separate stack_frame objects // corresponding to the following language elements: // // * user-defined functions // // These are .m files. They have local variables. // // * scripts // // These are .m files, but not functions. They access variables, // but do not store any values directly. All values are stored in // the stack frame corresponding to the scope in which they are // executed. // // * scopes that do not correspond to functions // // This is primarily used by the top-level scope but the // interpreter may also create temporary scopes in which to // evaluate functions or scripts. // // * compiled functions // // These are built-in functions and dynamically-loaded compiled // functions (.mex and .oct files) and do not contain variable // values of their own. They are skipped when Octave displays a // stack trace. // // All stack frames also contain the following data: // // * a reference to the evaluator that contains the frame // // Global variables are now stored in the evaluator and this link // gives us immediate access to them. // // * line and column in the source file where the stack frame was created // // These values are used to print stack traces. // // * A pointer to the nearest parent frame that contains variable // info (the "static" link) // // A frame that contains variable info may be a user-defined // function, script, or scope frame. This pointer should never // point to a compiled function stack frame. // // * A pointer to the nearest lexical parent frame (the "access" link) // // Used to access non-local variables for nested and anonymous // functions or as a link to the parent frame in which a script is // executed. This pointer should only point to a parent function // stack frame. OCTAVE_BEGIN_NAMESPACE(octave) class tree_evaluator; class symbol_info_list; class unwind_protect; class stack_frame_walker; class stack_frame { public: typedef std::map<std::string, octave_value> local_vars_map; // Markers indicating the type of a variable. Values for local // variables are stored in the stack frame. Values for // global variables are stored in the tree_evaluator object that // contains the stack frame. Values for persistent variables are // stored in the function scope corresponding to the stack frame. enum scope_flags { LOCAL, GLOBAL, PERSISTENT }; // Index into the list of automatic variables for user-defined // function stack frames. enum auto_var_type { ARG_NAMES, IGNORED, NARGIN, NARGOUT, SAVED_WARNING_STATES, NUM_AUTO_VARS }; stack_frame (void) = delete; stack_frame (tree_evaluator& tw, std::size_t index, const std::shared_ptr<stack_frame>& parent_link, const std::shared_ptr<stack_frame>& static_link, const std::shared_ptr<stack_frame>& access_link) : m_evaluator (tw), m_is_closure_context (false), m_line (-1), m_column (-1), m_index (index), m_parent_link (parent_link), m_static_link (static_link), m_access_link (access_link), m_dispatch_class () { } // Compiled function. static stack_frame * create (tree_evaluator& tw, octave_function *fcn, std::size_t index, const std::shared_ptr<stack_frame>& parent_link, const std::shared_ptr<stack_frame>& static_link); // Script. static stack_frame * create (tree_evaluator& tw, octave_user_script *script, std::size_t index, const std::shared_ptr<stack_frame>& parent_link, const std::shared_ptr<stack_frame>& static_link); // User-defined function. static stack_frame * create (tree_evaluator& tw, octave_user_function *fcn, std::size_t index, const std::shared_ptr<stack_frame>& parent_link, const std::shared_ptr<stack_frame>& static_link, const std::shared_ptr<stack_frame>& access_link = std::shared_ptr<stack_frame> ()); // Anonymous user-defined function with init vars. static stack_frame * create (tree_evaluator& tw, octave_user_function *fcn, std::size_t index, const std::shared_ptr<stack_frame>& parent_link, const std::shared_ptr<stack_frame>& static_link, const local_vars_map& local_vars, const std::shared_ptr<stack_frame>& access_link = std::shared_ptr<stack_frame> ()); // Scope. static stack_frame * create (tree_evaluator& tw, const symbol_scope& scope, std::size_t index, const std::shared_ptr<stack_frame>& parent_link, const std::shared_ptr<stack_frame>& static_link); stack_frame (const stack_frame& elt) = default; stack_frame& operator = (const stack_frame& elt) = delete; virtual ~stack_frame (void) = default; // FIXME: It would be nice to eliminate these but there are a few // places where we still need to know the specific type of the // stack frame that we are handling. virtual bool is_compiled_fcn_frame (void) const { return false; } virtual bool is_user_script_frame (void) const { return false; } virtual bool is_user_fcn_frame (void) const { return false; } virtual bool is_scope_frame (void) const { return false; } virtual void clear_values (void); std::size_t index (void) const { return m_index; } void line (int l) { m_line = l; } int line (void) const { return m_line; } void column (int c) { m_column = c; } int column (void) const { return m_column; } std::string fcn_file_name (void) const { octave_function *fcn = function (); return fcn ? fcn->fcn_file_name () : ""; } std::string fcn_name (bool print_subfn = true) const { std::string retval; octave_function *fcn = function (); if (fcn) { std::string parent_fcn_name = fcn->parent_fcn_name (); if (print_subfn && ! parent_fcn_name.empty ()) retval = parent_fcn_name + '>'; if (fcn->is_anonymous_function ()) retval += "@<anonymous>"; else retval += fcn->name (); } else retval = "<unknown>"; return retval; } virtual symbol_scope get_scope (void) const = 0; virtual octave_function * function (void) const { return nullptr; } virtual unwind_protect * unwind_protect_frame (void) { return nullptr; } symbol_info_list make_symbol_info_list (const std::list<symbol_record>& symrec_list) const; octave_value who (const string_vector& patterns, bool have_regexp, bool return_list, bool verbose, const std::string& whos_line_fmt, const std::string& msg); symbol_info_list all_variables (void); octave_value workspace (void); std::list<std::string> variable_names (void) const; // Look for named symbol visible from current scope. Don't // attempt to insert if missing. virtual symbol_record lookup_symbol (const std::string&) const = 0; // Look for named symbol visible from current scope. Attempt to // insert if missing. virtual symbol_record insert_symbol (const std::string&) = 0; symbol_info_list glob_symbol_info (const std::string& pattern); symbol_info_list regexp_symbol_info (const std::string& pattern); symbol_info_list get_symbol_info (void) { return all_variables (); } void make_persistent (const symbol_record& sym) { if (sym.is_formal ()) { std::string nm = sym.name (); error ("can't make function parameter %s persistent", nm.c_str ()); } if (is_global (sym)) { std::string nm = sym.name (); error ("can't make global variable '%s' persistent", nm.c_str ()); } install_variable (sym, octave_value (), false); mark_persistent (sym); } void make_global (const symbol_record& sym) { if (is_persistent (sym)) { std::string nm = sym.name (); error ("can't make persistent variable '%s' global", nm.c_str ()); } install_variable (sym, octave_value (), true); mark_global (sym); } std::shared_ptr<stack_frame> parent_link (void) const {return m_parent_link; } std::shared_ptr<stack_frame> static_link (void) const {return m_static_link; } std::shared_ptr<stack_frame> access_link (void) const {return m_access_link; } virtual std::size_t size (void) const; virtual void resize (std::size_t); void mark_global (const symbol_record& sym) { mark_scope (sym, GLOBAL); } void unmark_global (const symbol_record& sym) { mark_scope (sym, LOCAL); } void mark_persistent (const symbol_record& sym) { mark_scope (sym, PERSISTENT); } void unmark_persistent (const symbol_record& sym) { mark_scope (sym, LOCAL); } bool is_defined (const symbol_record& sym) const { octave_value val = varval (sym); return val.is_defined (); } bool is_variable (const symbol_record& sym) const { octave_value val = varval (sym); return val.is_defined (); } bool is_variable (const std::string& name) const { symbol_record sym = lookup_symbol (name); return sym ? is_variable (sym) : false; } bool is_local_variable (const std::string& name) const { symbol_record sym = lookup_symbol (name); return sym ? (is_variable (sym) && ! is_global (sym)) : false; } bool is_object (const symbol_record& sym) const { octave_value val = varval (sym); return val.isobject (); } bool is_object (const std::string& name) const { symbol_record sym = lookup_symbol (name); return sym ? is_object (sym) : false; } virtual scope_flags scope_flag (const symbol_record&) const = 0; virtual scope_flags get_scope_flag (std::size_t) const; virtual void set_scope_flag (std::size_t, scope_flags); bool is_global (const symbol_record& sym) const { return scope_flag (sym) == GLOBAL; } bool is_global (const std::string& name) const { symbol_record sym = lookup_symbol (name); return sym ? is_global (sym) : false; } bool is_persistent (const symbol_record& sym) const { return scope_flag (sym) == PERSISTENT; } bool is_persistent (const std::string& name) const { symbol_record sym = lookup_symbol (name); return sym ? is_persistent (sym) : false; } void install_variable (const symbol_record& sym, const octave_value& value, bool global); void install_variable (const std::string& name, const octave_value& value, bool global) { symbol_record sym = insert_symbol (name); install_variable (sym, value, global); } virtual octave_value get_auto_fcn_var (auto_var_type) const = 0; virtual void set_auto_fcn_var (auto_var_type, const octave_value&) = 0; virtual octave_value varval (const symbol_record& sym) const = 0;; virtual octave_value varval (std::size_t data_offset) const; octave_value varval (const std::string& name) const { symbol_record sym = lookup_symbol (name); return sym ? varval (sym) : octave_value (); } virtual octave_value& varref (const symbol_record& sym) = 0; virtual octave_value& varref (std::size_t data_offset); void assign (const symbol_record& sym, const octave_value& val) { octave_value& lhs = varref (sym); if (lhs.get_count () == 1) lhs.call_object_destructor (); // Regularize a null matrix if stored into a variable. lhs = val.storable_value (); } void assign (const std::string& name, const octave_value& val) { symbol_record sym = insert_symbol (name); assign (sym, val); } void assign (octave_value::assign_op op, const symbol_record& sym, const std::string& type, const std::list<octave_value_list>& idx, const octave_value& rhs) { if (idx.empty ()) { if (op == octave_value::op_asn_eq) assign (sym, rhs); else varref (sym).assign (op, rhs); } else varref (sym).assign (op, type, idx, rhs); } void non_const_unary_op (octave_value::unary_op op, const symbol_record& sym, const std::string& type, const std::list<octave_value_list>& idx) { if (idx.empty ()) varref (sym).non_const_unary_op (op); else varref (sym).non_const_unary_op (op, type, idx); } octave_value value (const symbol_record& sym, const std::string& type, const std::list<octave_value_list>& idx) const { octave_value retval = varval (sym); if (! idx.empty ()) { if (retval.is_constant ()) retval = retval.subsref (type, idx); else { octave_value_list t = retval.subsref (type, idx, 1); retval = t.length () > 0 ? t(0) : octave_value (); } } return retval; } octave_value find_subfunction (const std::string& name) const { symbol_scope scope = get_scope (); return scope.find_subfunction (name); } void clear (const symbol_record& sym) { if (is_global (sym)) unmark_global (sym); assign (sym, octave_value ()); if (is_persistent (sym)) unmark_persistent (sym); } void clear_objects (void); void clear_variable (const std::string& name); void clear_variable_pattern (const std::string& pattern); void clear_variable_pattern (const string_vector& patterns); void clear_variable_regexp (const std::string& pattern); void clear_variable_regexp (const string_vector& patterns); void clear_variables (void); std::string get_dispatch_class (void) const { return m_dispatch_class; } void set_dispatch_class (const std::string& class_name) { m_dispatch_class = class_name; } void display_stopped_in_message (std::ostream& os) const; virtual void mark_scope (const symbol_record&, scope_flags) = 0; virtual void display (bool follow = true) const; virtual void accept (stack_frame_walker& sfw) = 0; virtual void break_closure_cycles (const std::shared_ptr<stack_frame>&) { } void mark_closure_context (void) { m_is_closure_context = true; } bool is_closure_context (void) const { return m_is_closure_context; } protected: // Reference to the call stack that contains this frame. Global // variables are stored in the call stack. This link gives us // immediate access to them. tree_evaluator& m_evaluator; // TRUE if this stack frame is saved with a handle to a nested // function (closure). bool m_is_closure_context; // The line and column of the source file where this stack frame // was created. Used to print stack traces. int m_line; int m_column; // Index in call stack. std::size_t m_index; // Pointer to the nearest parent frame. May include compiled // functions. std::shared_ptr<stack_frame> m_parent_link; // Pointer to the nearest parent frame that contains variable // information (script, function, or scope). This link skips over // compiled function parent frames. std::shared_ptr<stack_frame> m_static_link; // Pointer to the nearest lexical parent frame. Used to access // non-local variables for nested and anonymous functions or as a // link to the parent frame in which a script is executed. std::shared_ptr<stack_frame> m_access_link; // Allow function handles to temporarily store their dispatch class // in the call stack. std::string m_dispatch_class; }; OCTAVE_END_NAMESPACE(octave) #endif