unix-cpy: Remove unix-cpy. It's no longer needed.

unix-cpy was originally written to get semantic equivalent with CPython
without writing functional tests.  When writing the initial
implementation of uPy it was a long way between lexer and functional
tests, so the half-way test was to make sure that the bytecode was
correct.  The idea was that if the uPy bytecode matched CPython 1-1 then
uPy would be proper Python if the bytecodes acted correctly.  And having
matching bytecode meant that it was less likely to miss some deep
subtlety in the Python semantics that would require an architectural
change later on.

But that is all history and it no longer makes sense to retain the
ability to output CPython bytecode, because:

1. It outputs CPython 3.3 compatible bytecode.  CPython's bytecode
changes from version to version, and seems to have changed quite a bit
in 3.5.  There's no point in changing the bytecode output to match
CPython anymore.

2. uPy and CPy do different optimisations to the bytecode which makes it
harder to match.

3. The bytecode tests are not run.  They were never part of Travis and
are not run locally anymore.

4. The EMIT_CPYTHON option needs a lot of extra source code which adds
heaps of noise, especially in compile.c.

5. Now that there is an extensive test suite (which tests functionality)
there is no need to match the bytecode.  Some very subtle behaviour is
tested with the test suite and passing these tests is a much better
way to stay Python-language compliant, rather than trying to match
CPy bytecode.

1 files changed, 0 insertions, 111 deletions

diff --git a/tests/bytecode/pylib-tests/symbol.py b/tests/bytecode/pylib-tests/symbol.py
deleted file mode 100644
index 34143b5d8e..0000000000
--- a/tests/bytecode/pylib-tests/symbol.py
+++ /dev/null
@@ -1,111 +0,0 @@
-#! /usr/bin/env python3
-
-"""Non-terminal symbols of Python grammar (from "graminit.h")."""
-
-#  This file is automatically generated; please don't muck it up!
-#
-#  To update the symbols in this file, 'cd' to the top directory of
-#  the python source tree after building the interpreter and run:
-#
-#    ./python Lib/symbol.py
-
-#--start constants--
-single_input = 256
-file_input = 257
-eval_input = 258
-decorator = 259
-decorators = 260
-decorated = 261
-funcdef = 262
-parameters = 263
-typedargslist = 264
-tfpdef = 265
-varargslist = 266
-vfpdef = 267
-stmt = 268
-simple_stmt = 269
-small_stmt = 270
-expr_stmt = 271
-testlist_star_expr = 272
-augassign = 273
-del_stmt = 274
-pass_stmt = 275
-flow_stmt = 276
-break_stmt = 277
-continue_stmt = 278
-return_stmt = 279
-yield_stmt = 280
-raise_stmt = 281
-import_stmt = 282
-import_name = 283
-import_from = 284
-import_as_name = 285
-dotted_as_name = 286
-import_as_names = 287
-dotted_as_names = 288
-dotted_name = 289
-global_stmt = 290
-nonlocal_stmt = 291
-assert_stmt = 292
-compound_stmt = 293
-if_stmt = 294
-while_stmt = 295
-for_stmt = 296
-try_stmt = 297
-with_stmt = 298
-with_item = 299
-except_clause = 300
-suite = 301
-test = 302
-test_nocond = 303
-lambdef = 304
-lambdef_nocond = 305
-or_test = 306
-and_test = 307
-not_test = 308
-comparison = 309
-comp_op = 310
-star_expr = 311
-expr = 312
-xor_expr = 313
-and_expr = 314
-shift_expr = 315
-arith_expr = 316
-term = 317
-factor = 318
-power = 319
-atom = 320
-testlist_comp = 321
-trailer = 322
-subscriptlist = 323
-subscript = 324
-sliceop = 325
-exprlist = 326
-testlist = 327
-dictorsetmaker = 328
-classdef = 329
-arglist = 330
-argument = 331
-comp_iter = 332
-comp_for = 333
-comp_if = 334
-encoding_decl = 335
-yield_expr = 336
-yield_arg = 337
-#--end constants--
-
-sym_name = {}
-for _name, _value in list(globals().items()):
-    if type(_value) is type(0):
-        sym_name[_value] = _name
-
-
-def main():
-    import sys
-    import token
-    if len(sys.argv) == 1:
-        sys.argv = sys.argv + ["Include/graminit.h", "Lib/symbol.py"]
-    token._main()
-
-if __name__ == "__main__":
-    main()