From e1270f81bdc81f5a575b34c2d2c294bdde3e6f4f Mon Sep 17 00:00:00 2001
From: Nathan Binkert <nate@binkert.org>
Date: Sun, 16 Aug 2009 13:39:58 -0700
Subject: ply: update PLY to version 3.2
---
ext/ply/example/BASIC/basiclog.py | 79 +++++++++++++++++++++++++++++++++++++++
1 file changed, 79 insertions(+)
create mode 100644 ext/ply/example/BASIC/basiclog.py
(limited to 'ext/ply/example/BASIC/basiclog.py')
diff --git a/ext/ply/example/BASIC/basiclog.py b/ext/ply/example/BASIC/basiclog.py
new file mode 100644
index 000000000..ccfd7b967
--- /dev/null
+++ b/ext/ply/example/BASIC/basiclog.py
@@ -0,0 +1,79 @@
+# An implementation of Dartmouth BASIC (1964)
+#
+
+import sys
+sys.path.insert(0,"../..")
+
+if sys.version_info[0] >= 3:
+ raw_input = input
+
+import logging
+logging.basicConfig(
+ level = logging.INFO,
+ filename = "parselog.txt",
+ filemode = "w"
+)
+log = logging.getLogger()
+
+import basiclex
+import basparse
+import basinterp
+
+# If a filename has been specified, we try to run it.
+# If a runtime error occurs, we bail out and enter
+# interactive mode below
+if len(sys.argv) == 2:
+ data = open(sys.argv[1]).read()
+ prog = basparse.parse(data,debug=log)
+ if not prog: raise SystemExit
+ b = basinterp.BasicInterpreter(prog)
+ try:
+ b.run()
+ raise SystemExit
+ except RuntimeError:
+ pass
+
+else:
+ b = basinterp.BasicInterpreter({})
+
+# Interactive mode. This incrementally adds/deletes statements
+# from the program stored in the BasicInterpreter object. In
+# addition, special commands 'NEW','LIST',and 'RUN' are added.
+# Specifying a line number with no code deletes that line from
+# the program.
+
+while 1:
+ try:
+ line = raw_input("[BASIC] ")
+ except EOFError:
+ raise SystemExit
+ if not line: continue
+ line += "\n"
+ prog = basparse.parse(line,debug=log)
+ if not prog: continue
+
+ keys = list(prog)
+ if keys[0] > 0:
+ b.add_statements(prog)
+ else:
+ stat = prog[keys[0]]
+ if stat[0] == 'RUN':
+ try:
+ b.run()
+ except RuntimeError:
+ pass
+ elif stat[0] == 'LIST':
+ b.list()
+ elif stat[0] == 'BLANK':
+ b.del_line(stat[1])
+ elif stat[0] == 'NEW':
+ b.new()
+
+
+
+
+
+
+
+
+
--
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