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pt-pr-code.cc
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2000-01-15
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/*
Copyright (C) 1996, 1997 John W. Eaton
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 2, 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, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if defined (__GNUG__)
#pragma implementation
#endif
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <iostream.h>
#include "error.h"
#include "ov-usr-fcn.h"
#include "pr-output.h"
#include "pt-all.h"
void
tree_print_code::visit_argument_list (tree_argument_list& lst)
{
Pix p = lst.first ();
while (p)
{
tree_expression *elt = lst (p);
lst.next (p);
if (elt)
{
elt->accept (*this);
if (p)
os << ", ";
}
}
}
void
tree_print_code::visit_binary_expression (tree_binary_expression& expr)
{
indent ();
print_parens (expr, "(");
tree_expression *op1 = expr.lhs ();
if (op1)
op1->accept (*this);
os << " " << expr.oper () << " ";
tree_expression *op2 = expr.rhs ();
if (op2)
op2->accept (*this);
print_parens (expr, ")");
}
void
tree_print_code::visit_break_command (tree_break_command&)
{
indent ();
os << "break";
}
void
tree_print_code::visit_colon_expression (tree_colon_expression& expr)
{
indent ();
print_parens (expr, "(");
tree_expression *op1 = expr.base ();
if (op1)
op1->accept (*this);
// Stupid syntax.
tree_expression *op3 = expr.increment ();
if (op3)
{
os << ":";
op3->accept (*this);
}
tree_expression *op2 = expr.limit ();
if (op2)
{
os << ":";
op2->accept (*this);
}
print_parens (expr, ")");
}
void
tree_print_code::visit_continue_command (tree_continue_command&)
{
indent ();
os << "continue";
}
void
tree_print_code::visit_decl_command (tree_decl_command& cmd)
{
indent ();
os << cmd.name () << " ";
tree_decl_init_list *init_list = cmd.initializer_list ();
if (init_list)
init_list->accept (*this);
}
void
tree_print_code::visit_decl_elt (tree_decl_elt& cmd)
{
tree_identifier *id = cmd.ident ();
if (id)
id->accept (*this);
tree_expression *expr = cmd.expression ();
if (expr)
{
os << " = ";
expr->accept (*this);
}
}
void
tree_print_code::visit_decl_init_list (tree_decl_init_list& lst)
{
Pix p = lst.first ();
while (p)
{
tree_decl_elt *elt = lst (p);
lst.next (p);
if (elt)
{
elt->accept (*this);
if (p)
os << ", ";
}
}
}
void
tree_print_code::visit_simple_for_command (tree_simple_for_command& cmd)
{
indent ();
os << "for ";
tree_expression *lhs = cmd.left_hand_side ();
if (lhs)
lhs->accept (*this);
os << " = ";
tree_expression *expr = cmd.control_expr ();
if (expr)
expr->accept (*this);
newline ();
tree_statement_list *list = cmd.body ();
if (list)
{
increment_indent_level ();
list->accept (*this);
decrement_indent_level ();
}
indent ();
os << "endfor";
}
void
tree_print_code::visit_complex_for_command (tree_complex_for_command& cmd)
{
indent ();
os << "for [";
tree_argument_list *lhs = cmd.left_hand_side ();
if (lhs)
lhs->accept (*this);
os << "] = ";
tree_expression *expr = cmd.control_expr ();
if (expr)
expr->accept (*this);
newline ();
tree_statement_list *list = cmd.body ();
if (list)
{
increment_indent_level ();
list->accept (*this);
decrement_indent_level ();
}
indent ();
os << "endfor";
}
void
tree_print_code::visit_octave_user_function (octave_user_function& fcn)
{
reset ();
visit_octave_user_function_header (fcn);
tree_statement_list *cmd_list = fcn.body ();
if (cmd_list)
{
increment_indent_level ();
cmd_list->accept (*this);
decrement_indent_level ();
}
visit_octave_user_function_trailer (fcn);
}
void
tree_print_code::visit_octave_user_function_header (octave_user_function& fcn)
{
indent ();
os << "function ";
tree_parameter_list *ret_list = fcn.return_list ();
if (ret_list)
{
bool takes_var_return = fcn.takes_var_return ();
int len = ret_list->length ();
if (len > 1 || takes_var_return)
os << "[";
ret_list->accept (*this);
if (takes_var_return)
{
if (len > 0)
os << ", ";
os << "...";
}
if (len > 1 || takes_var_return)
os << "]";
os << " = ";
}
string fcn_name = fcn.function_name ();
os << (fcn_name.empty () ? string ("(empty)") : fcn_name) << " ";
tree_parameter_list *param_list = fcn.parameter_list ();
if (param_list)
{
bool takes_varargs = fcn.takes_varargs ();
int len = param_list->length ();
if (len > 0 || takes_varargs)
os << "(";
param_list->accept (*this);
if (takes_varargs)
{
if (len > 0)
os << ", ";
os << "...";
}
if (len > 0 || takes_varargs)
{
os << ")";
newline ();
}
}
else
{
os << "()";
newline ();
}
}
void
tree_print_code::visit_octave_user_function_trailer (octave_user_function&)
{
indent ();
os << "endfunction";
newline ();
}
void
tree_print_code::visit_identifier (tree_identifier& id)
{
indent ();
print_parens (id, "(");
string nm = id.name ();
os << (nm.empty () ? string ("(empty)") : nm);
print_parens (id, ")");
}
void
tree_print_code::visit_if_clause (tree_if_clause& cmd)
{
tree_expression *expr = cmd.condition ();
if (expr)
expr->accept (*this);
newline ();
increment_indent_level ();
tree_statement_list *list = cmd.commands ();
if (list)
{
list->accept (*this);
decrement_indent_level ();
}
}
void
tree_print_code::visit_if_command (tree_if_command& cmd)
{
indent ();
os << "if ";
tree_if_command_list *list = cmd.cmd_list ();
if (list)
list->accept (*this);
indent ();
os << "endif";
}
void
tree_print_code::visit_if_command_list (tree_if_command_list& lst)
{
Pix p = lst.first ();
bool first_elt = true;
while (p)
{
tree_if_clause *elt = lst (p);
if (elt)
{
if (! first_elt)
{
indent ();
if (elt->is_else_clause ())
os << "else";
else
os << "elseif ";
}
elt->accept (*this);
}
first_elt = false;
lst.next (p);
}
}
void
tree_print_code::visit_index_expression (tree_index_expression& expr)
{
indent ();
print_parens (expr, "(");
tree_expression *e = expr.expression ();
if (e)
e->accept (*this);
tree_argument_list *list = expr.arg_list ();
if (list)
{
os << " (";
list->accept (*this);
os << ")";
}
print_parens (expr, ")");
}
void
tree_print_code::visit_indirect_ref (tree_indirect_ref& expr)
{
indent ();
print_parens (expr, "(");
tree_expression *e = expr.expression ();
if (e)
e->accept (*this);
os << "." << expr.elt_name ();
print_parens (expr, ")");
}
void
tree_print_code::visit_matrix (tree_matrix& lst)
{
indent ();
print_parens (lst, "(");
os << "[";
Pix p = lst.first ();
while (p)
{
tree_argument_list *elt = lst (p);
lst.next (p);
if (elt)
{
elt->accept (*this);
if (p)
os << "; ";
}
}
os << "]";
print_parens (lst, ")");
}
void
tree_print_code::visit_cell (tree_cell& lst)
{
indent ();
print_parens (lst, "(");
os << "{";
Pix p = lst.first ();
while (p)
{
tree_argument_list *elt = lst (p);
lst.next (p);
if (elt)
{
elt->accept (*this);
if (p)
os << "; ";
}
}
os << "}";
print_parens (lst, ")");
}
void
tree_print_code::visit_multi_assignment (tree_multi_assignment& expr)
{
indent ();
print_parens (expr, "(");
tree_argument_list *lhs = expr.left_hand_side ();
if (lhs)
{
int len = lhs->length ();
if (len > 1)
os << "[";
lhs->accept (*this);
if (len > 1)
os << "]";
}
os << " " << expr.oper () << " ";
tree_expression *rhs = expr.right_hand_side ();
if (rhs)
rhs->accept (*this);
print_parens (expr, ")");
}
void
tree_print_code::visit_no_op_command (tree_no_op_command& cmd)
{
indent ();
os << cmd.original_command ();
}
void
tree_print_code::visit_constant (tree_constant& val)
{
indent ();
print_parens (val, "(");
val.print_raw (os, true, print_original_text);
print_parens (val, ")");
}
void
tree_print_code::visit_parameter_list (tree_parameter_list& lst)
{
Pix p = lst.first ();
while (p)
{
tree_identifier *elt = lst (p);
lst.next (p);
if (elt)
{
elt->accept (*this);
if (p)
os << ", ";
}
}
}
void
tree_print_code::visit_plot_command (tree_plot_command& cmd)
{
indent ();
int ndim = cmd.num_dimensions ();
switch (ndim)
{
case 1:
os << "replot";
break;
case 2:
os << "gplot";
break;
case 3:
os << "gsplot";
break;
default:
os << "<unkown plot command>";
break;
}
plot_limits *range = cmd.limits ();
if (range)
range->accept (*this);
subplot_list *plot_list = cmd.subplots ();
if (plot_list)
plot_list->accept (*this);
}
void
tree_print_code::visit_plot_limits (plot_limits& cmd)
{
plot_range *x_range = cmd.x_limits ();
if (x_range)
x_range->accept (*this);
plot_range *y_range = cmd.y_limits ();
if (y_range)
y_range->accept (*this);
plot_range *z_range = cmd.z_limits ();
if (z_range)
z_range->accept (*this);
}
void
tree_print_code::visit_plot_range (plot_range& cmd)
{
os << " [";
tree_expression *lower = cmd.lower_bound ();
if (lower)
lower->accept (*this);
os << ":";
tree_expression *upper = cmd.upper_bound ();
if (upper)
upper->accept (*this);
os << "]";
}
void
tree_print_code::visit_postfix_expression (tree_postfix_expression& expr)
{
indent ();
print_parens (expr, "(");
tree_expression *e = expr.operand ();
if (e)
e->accept (*this);
os << expr.oper ();
print_parens (expr, ")");
}
void
tree_print_code::visit_prefix_expression (tree_prefix_expression& expr)
{
indent ();
print_parens (expr, "(");
os << expr.oper ();
tree_expression *e = expr.operand ();
if (e)
e->accept (*this);
print_parens (expr, ")");
}
void
tree_print_code::visit_return_command (tree_return_command&)
{
indent ();
os << "return";
}
void
tree_print_code::visit_return_list (tree_return_list& lst)
{
Pix p = lst.first ();
while (p)
{
tree_index_expression *elt = lst (p);
lst.next (p);
if (elt)
{
elt->accept (*this);
if (p)
os << ", ";
}
}
}
void
tree_print_code::visit_simple_assignment (tree_simple_assignment& expr)
{
indent ();
print_parens (expr, "(");
tree_expression *lhs = expr.left_hand_side ();
if (lhs)
lhs->accept (*this);
os << " " << expr.oper () << " ";
tree_expression *rhs = expr.right_hand_side ();
if (rhs)
rhs->accept (*this);
print_parens (expr, ")");
}
void
tree_print_code::visit_statement (tree_statement& stmt)
{
tree_command *cmd = stmt.command ();
if (cmd)
{
cmd->accept (*this);
if (! stmt.print_result ())
os << ";";
newline ();
}
else
{
tree_expression *expr = stmt.expression ();
if (expr)
{
expr->accept (*this);
if (! stmt.print_result ())
os << ";";
newline ();
}
}
}
void
tree_print_code::visit_statement_list (tree_statement_list& lst)
{
for (Pix p = lst.first (); p != 0; lst.next (p))
{
tree_statement *elt = lst (p);
if (elt)
elt->accept (*this);
}
}
void
tree_print_code::visit_subplot (subplot& cmd)
{
tree_expression *sp_plot_data = cmd.plot_data ();
if (sp_plot_data)
{
os << " ";
sp_plot_data->accept (*this);
}
subplot_axes *sp_axes_clause = cmd.axes_clause ();
if (sp_axes_clause)
sp_axes_clause->accept (*this);
subplot_using *sp_using_clause = cmd.using_clause ();
if (sp_using_clause)
sp_using_clause->accept (*this);
tree_expression *sp_title_clause = cmd.title_clause ();
if (sp_title_clause)
sp_title_clause->accept (*this);
subplot_style *sp_style_clause = cmd.style_clause ();
if (sp_style_clause)
sp_style_clause->accept (*this);
}
void
tree_print_code::visit_subplot_axes (subplot_axes& cmd)
{
os << " axes " << cmd.axes ();
}
void
tree_print_code::visit_subplot_list (subplot_list& lst)
{
Pix p = lst.first ();
while (p)
{
subplot *elt = lst (p);
lst.next (p);
if (elt)
{
elt->accept (*this);
if (p)
os << ",";
}
}
}
void
tree_print_code::visit_subplot_style (subplot_style& cmd)
{
os << " with " << cmd.style ();
tree_expression *sp_linetype = cmd.linetype ();
if (sp_linetype)
{
os << " ";
sp_linetype->accept (*this);
}
tree_expression *sp_pointtype = cmd.pointtype ();
if (sp_pointtype)
{
os << " ";
sp_pointtype->accept (*this);
}
}
void
tree_print_code::visit_subplot_using (subplot_using& cmd)
{
os << " using ";
int qual_count = cmd.qualifier_count ();
if (qual_count > 0)
{
tree_expression **x = cmd.qualifiers ();
for (int i = 0; i < qual_count; i++)
{
if (i > 0)
os << ":";
if (x[i])
x[i]->accept (*this);
}
}
else
{
tree_expression *scanf_fmt = cmd.scanf_format ();
if (scanf_fmt)
scanf_fmt->accept (*this);
}
}
void
tree_print_code::visit_switch_case (tree_switch_case& cs)
{
indent ();
if (cs.is_default_case ())
os << "otherwise";
else
os << "case ";
tree_expression *label = cs.case_label ();
if (label)
label->accept (*this);
newline ();
increment_indent_level ();
tree_statement_list *list = cs.commands ();
if (list)
{
list->accept (*this);
decrement_indent_level ();
}
}
void
tree_print_code::visit_switch_case_list (tree_switch_case_list& lst)
{
Pix p = lst.first ();
while (p)
{
tree_switch_case *elt = lst (p);
if (elt)
elt->accept (*this);
lst.next (p);
}
}
void
tree_print_code::visit_switch_command (tree_switch_command& cmd)
{
indent ();
os << "switch ";
tree_expression *expr = cmd.switch_value ();
if (expr)
expr->accept (*this);
newline ();
increment_indent_level ();
tree_switch_case_list *list = cmd.case_list ();
if (list)
list->accept (*this);
indent ();
os << "endswitch";
}
void
tree_print_code::visit_try_catch_command (tree_try_catch_command& cmd)
{
indent ();
os << "try_catch";
newline ();
tree_statement_list *try_code = cmd.body ();
if (try_code)
{
increment_indent_level ();
try_code->accept (*this);
decrement_indent_level ();
}
indent ();
os << "catch";
newline ();
tree_statement_list *catch_code = cmd.cleanup ();
if (catch_code)
{
increment_indent_level ();
catch_code->accept (*this);
decrement_indent_level ();
}
indent ();
os << "end_try_catch";
}
void
tree_print_code::visit_unwind_protect_command
(tree_unwind_protect_command& cmd)
{
indent ();
os << "unwind_protect";
newline ();
tree_statement_list *unwind_protect_code = cmd.body ();
if (unwind_protect_code)
{
increment_indent_level ();
unwind_protect_code->accept (*this);
decrement_indent_level ();
}
indent ();
os << "cleanup_code";
newline ();
tree_statement_list *cleanup_code = cmd.cleanup ();
if (cleanup_code)
{
increment_indent_level ();
cleanup_code->accept (*this);
decrement_indent_level ();
}
indent ();
os << "end_unwind_protect";
}
void
tree_print_code::visit_while_command (tree_while_command& cmd)
{
indent ();
os << "while ";
tree_expression *expr = cmd.condition ();
if (expr)
expr->accept (*this);
newline ();
tree_statement_list *list = cmd.body ();
if (list)
{
increment_indent_level ();
list->accept (*this);
decrement_indent_level ();
}
indent ();
os << "endwhile";
}
// Current indentation.
int tree_print_code::curr_print_indent_level = 0;
// TRUE means we are at the beginning of a line.
bool tree_print_code::beginning_of_line = true;
// Each print_code() function should call this before printing
// anything.
//
// This doesn't need to be fast, but isn't there a better way?
void
tree_print_code::indent (void)
{
assert (curr_print_indent_level >= 0);
if (beginning_of_line)
{
os << prefix;
for (int i = 0; i < curr_print_indent_level; i++)
os << " ";
beginning_of_line = false;
}
}
// All print_code() functions should use this to print new lines.
void
tree_print_code::newline (void)
{
os << "\n";
beginning_of_line = true;
}
// For ressetting print_code state.
void
tree_print_code::reset (void)
{
beginning_of_line = true;
curr_print_indent_level = 0;
}
void
tree_print_code::print_parens (const tree_expression& expr, const char *txt)
{
int n = expr.paren_count ();
for (int i = 0; i < n; i++)
os << txt;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/