Add END statement, fix float parsing with exponents

diff --git a/LICENSE b/LICENSE
new file mode 100644 (file)
index 0000000..d159169
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program 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 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

diff --git a/applesoft_basic.l b/applesoft_basic.l
index 0ffea7c..0402224 100644 (file)
--- a/applesoft_basic.l
+++ b/applesoft_basic.l
@@ -130,7 +130,7 @@ P\ *R\ *I\ *N\ *T/(\ *[A-Z0-9])*(\ *[$%])? {
   return y_tab.KEYWORD_PRINT
 }
 P\ *R\ *# {
-  return y_tab.KEYWORD_PR_FLOAT_LITERAL
+  return y_tab.KEYWORD_PR_NUMBER
 }
 P\ *O\ *S/(\ *[A-Z0-9])*(\ *[$%])? {
   return y_tab.KEYWORD_POS
@@ -208,7 +208,7 @@ I\ *N\ *P\ *U\ *T/(\ *[A-Z0-9])*(\ *[$%])? {
   return y_tab.KEYWORD_INPUT
 }
 I\ *N\ *# {
-  return y_tab.KEYWORD_IN_FLOAT_LITERAL
+  return y_tab.KEYWORD_IN_NUMBER
 }
 I\ *F/(\ *[A-Z0-9])*(\ *[$%])? {
   return y_tab.KEYWORD_IF
@@ -324,7 +324,7 @@ A\ *B\ *S/(\ *[A-Z0-9])*(\ *[$%])? {
 (?E{t_def.NodeTextIntLiteral}(?E{t_def.NodeText.Char}[0-9])(\ *(?E{t_def.NodeText.Char}[0-9]))*) {
   return y_tab.INT_LITERAL
 }
-(?E{t_def.NodeFloatLiteral}((?E{t_def.NodeFloatLiteral.NodeTextInteger}(?E{t_def.NodeText.Char}[0-9])(\ *(?E{t_def.NodeText.Char}[0-9]))*)|(?E{t_def.NodeFloatLiteral.NodeTextInteger}((?E{t_def.NodeText.Char}[0-9])\ *)*)(?E{t_def.NodeFloatLiteral.NodeTextFraction}\.(\ *(?E{t_def.NodeText.Char}[0-9]))*))(?E{t_def.NodeFloatLiteral.Exponent}\ *E(?E{t_def.NodeFloatLiteral.NodeTextSign}(\ *(?E{t_def.NodeText.Char}[+-]))?)(?E{t_def.NodeFloatLiteral.NodeTextInteger}(\ *(?E{t_def.NodeText.Char}[0-9]))*))?) {
+(?E{t_def.NodeFloatLiteral}((?E{t_def.NodeFloatLiteral.NodeTextInteger}(?E{t_def.NodeText.Char}[0-9])(\ *(?E{t_def.NodeText.Char}[0-9]))*)(?E{t_def.NodeFloatLiteral.NodeTextFraction}"")|(?E{t_def.NodeFloatLiteral.NodeTextInteger}((?E{t_def.NodeText.Char}[0-9])\ *)*)(?E{t_def.NodeFloatLiteral.NodeTextFraction}\.(\ *(?E{t_def.NodeText.Char}[0-9]))*))(?E{t_def.NodeFloatLiteral.NodeExponent}\ *E(?E{t_def.NodeFloatLiteral.NodeTextSign}(\ *(?E{t_def.NodeText.Char}[+-]))?)\ *(?E{t_def.NodeFloatLiteral.NodeTextInteger}(?E{t_def.NodeText.Char}[0-9])(\ *(?E{t_def.NodeText.Char}[0-9]))*))?) {
   return y_tab.FLOAT_LITERAL
 }
 \"(?E{t_def.NodeStrLiteral}[^"\n]*)\" {

diff --git a/applesoft_basic.py b/applesoft_basic.py
index 2dda9b4..5dbe72f 100755 (executable)
--- a/applesoft_basic.py
+++ b/applesoft_basic.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 
-# Copyright (C) 2018 Nick Downing <nick@ndcode.org>
+# Copyright (C) 2022 Nick Downing <nick@ndcode.org>
 # SPDX-License-Identifier: GPL-2.0-only
 #
 # This program is free software; you can redistribute it and/or modify it under
@@ -21,15 +21,23 @@ import element
 import sys
 import y_tab
 
+#import lex_yy
+#print('yylex()', lex_yy.yylex())
+#print('yytext', f'"{lex_yy.yytext:s}"')
+#assert False
+
 print('y_tab.yyparse()')
 program = y_tab.yyparse(t_def.NodeProgram)
 
+print('element.serialize()')
+element.serialize(program, sys.stdout)
+
 print('program.post_process()')
 program.post_process(program)
 
 print('element.serialize()')
 element.serialize(program, sys.stdout)
 
-print('context.execute()')
+print('context.run()')
 context = t_def.Context(program)
-context.execute()
+context.run()

diff --git a/applesoft_basic.t b/applesoft_basic.t
index 17315d8..325be7f 100644 (file)
--- a/applesoft_basic.t
+++ b/applesoft_basic.t
@@ -54,6 +54,7 @@ class NodeStatementPrint: NodeStatement {
 };
 class NodeStatementGoto: NodeStatement;
 class NodeStatementIf: NodeStatement;
+class NodeStatementEnd: NodeStatement;
 class NodeExpression: Node;
 class NodeExpressionOr: NodeExpression;
 class NodeExpressionAnd: NodeExpression;
@@ -95,6 +96,9 @@ class NodeExpressionVariable: NodeExpression;
 # this program; if not, write to the Free Software Foundation, Inc., 51
 # Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 
+class EndException(Exception):
+  pass
+
 class Context:
   def __init__(self, program = None, variables = None, i = 0, j = 1):
     self.program = program if program is not None else NodeProgram()
@@ -102,6 +106,12 @@ class Context:
     self.i = i
     self.j = j
 
+  def run(self):
+    try:
+      self.execute()
+    except EndException:
+      pass
+
   def line_number(self):
     assert self.i < len(self.program.children)
     return self.program.children[self.i].children[0].int_value
@@ -135,14 +145,15 @@ del post_process
 @method(NodeFloatLiteral)
 def post_process(self, program):
   Node.post_process(self, program)
-  exponent = 0
-  if len(self.children) >= 4:
-    exponent = int(self.children[3].str_value)
-    if self.children[2].str_value == '-':
-      exponent = -exponent
+  exponent_value = 0
+  if len(self.children) >= 3:
+    exponent = self.children[2]
+    exponent_value = int(exponent.children[1].str_value)
+    if exponent.children[0].str_value == '-':
+      exponent_value = -exponent_value
   value = (
     int(self.children[0].str_value + self.children[1].str_value) *
-      10. ** (exponent - len(self.children[1].str_value))
+      10. ** (exponent_value - len(self.children[1].str_value))
   )
   self.float_value = value
 del post_process
@@ -228,6 +239,9 @@ def execute(self, context):
   if value == '' or value == 0.:
     context.i += 1
     context.j = 1
+@method(NodeStatementEnd)
+def execute(self, context):
+  raise EndException()
 del execute
 
 @method(NodeExpression)

diff --git a/applesoft_basic.y b/applesoft_basic.y
index 2285491..001ca50 100644 (file)
--- a/applesoft_basic.y
+++ b/applesoft_basic.y
@@ -58,7 +58,7 @@
 %token KEYWORD_HPLOT
 %token KEYWORD_HTAB
 %token KEYWORD_IF
-%token KEYWORD_IN_FLOAT_LITERAL
+%token KEYWORD_IN_NUMBER
 %token KEYWORD_INPUT
 %token KEYWORD_INT
 %token KEYWORD_INVERSE
@@ -84,7 +84,7 @@
 %token KEYWORD_POKE
 %token KEYWORD_POP
 %token KEYWORD_POS
-%token KEYWORD_PR_FLOAT_LITERAL
+%token KEYWORD_PR_NUMBER
 %token KEYWORD_PRINT
 %token KEYWORD_READ
 %token KEYWORD_RECALL
@@ -158,8 +158,9 @@ statement_opt
   | %space (?E{t_def.NodeStatementPrint, semicolon = False}KEYWORD_PRINT print_expression_list0)
   | %space (?E{t_def.NodeStatementPrint, semicolon = True}KEYWORD_PRINT print_expression_list1)
   | %space (?E{t_def.NodeStatementGoto}KEYWORD_GOTO INT_LITERAL)
-  | %space (?E{t_def.NodeStatementIf}KEYWORD_IF expression KEYWORD_THEN)
+  | %space (?E{t_def.NodeStatementIf}KEYWORD_IF expression KEYWORD_THEN) statement_opt
   | %space (?E{t_def.NodeStatementIf}KEYWORD_IF expression KEYWORD_THEN) %space (?E{t_def.NodeStatementGoto}INT_LITERAL)
+  | %space (?E{t_def.NodeStatementEnd}KEYWORD_END)
   ;
 
 print_expression_list0

diff --git a/float_literal.txt b/float_literal.txt
new file mode 100644 (file)
index 0000000..cfd2366
--- /dev/null
+++ b/float_literal.txt
@@ -0,0 +1,33 @@
+we need a way for the lexer file to contain multi-line expressions,
+or at least a reliable way to add comments, for now keep a copy here
+
+(?E{t_def.NodeFloatLiteral}
+  (
+    (?E{t_def.NodeFloatLiteral.NodeTextInteger}
+      (?E{t_def.NodeText.Char}[0-9])
+      (\ *(?E{t_def.NodeText.Char}[0-9]))*
+    )
+    (?E{t_def.NodeFloatLiteral.NodeTextFraction}
+      ""
+    )
+    |
+    (?E{t_def.NodeFloatLiteral.NodeTextInteger}
+      ((?E{t_def.NodeText.Char}[0-9])\ *)*
+    )
+    (?E{t_def.NodeFloatLiteral.NodeTextFraction}
+      \.
+      (\ *(?E{t_def.NodeText.Char}[0-9]))*
+    )
+  )
+  (?E{t_def.NodeFloatLiteral.NodeExponent}
+    \ *E
+    (?E{t_def.NodeFloatLiteral.NodeTextSign}
+      (\ *(?E{t_def.NodeText.Char}[+-]))?
+    )
+    \ *
+    (?E{t_def.NodeFloatLiteral.NodeTextInteger}
+      (?E{t_def.NodeText.Char}[0-9])
+      (\ *(?E{t_def.NodeText.Char}[0-9]))*
+    )
+  )?
+)

diff --git a/test.bas b/test.bas
index 179be32..0532477 100644 (file)
--- a/test.bas
+++ b/test.bas
@@ -1,4 +1,5 @@
 10 I$="PI":I%=-3.141:I=3.141
 20 PRINT I$" "I%" "I
 30 I%=I%+1
-40 IF I%<10 THEN 20
+40 IF I%>5 THEN END
+50 GOTO 20