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Grammar reduction

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rocky
2017-11-27 04:56:01 -05:00
parent 3f7b5e6db3
commit 2674ec893a
6 changed files with 17 additions and 10 deletions
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6
uncompyle6/parser.py
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@@ -415,10 +415,6 @@ class PythonParser(GenericASTBuilder):
def p_setcomp(self, args):
"""
expr ::= setcomp
setcomp ::= LOAD_SETCOMP MAKE_FUNCTION_0 expr GET_ITER CALL_FUNCTION_1
comp_iter ::= comp_if
comp_iter ::= comp_for
comp_iter ::= comp_body
@@ -512,8 +508,6 @@ class PythonParser(GenericASTBuilder):
compare_chained ::= expr compare_chained1 ROT_TWO POP_TOP _come_from
compare_chained2 ::= expr COMPARE_OP JUMP_FORWARD
mapexpr ::= BUILD_MAP kvlist
# Non-null kvlist items are broken out in the indiviual grammars
kvlist ::=

13
uncompyle6/parsers/parse2.py
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@@ -100,6 +100,12 @@ class Python2Parser(PythonParser):
_mklambda ::= load_closure mklambda
kwarg ::= LOAD_CONST expr
kvlist ::= kvlist kv3
kv3 ::= expr expr STORE_MAP
mapexpr ::= BUILD_MAP kvlist
classdef ::= buildclass designator
buildclass ::= LOAD_CONST expr mkfunc
@@ -355,6 +361,12 @@ class Python2Parser(PythonParser):
"LOAD_ASSERT expr CALL_FUNCTION_1 RAISE_VARARGS_1 COME_FROM",
], customize)
continue
elif opname == 'LOAD_SETCOMP':
self.add_unique_rules([
"expr ::= setcomp",
"setcomp ::= LOAD_SETCOMP MAKE_FUNCTION_0 expr GET_ITER CALL_FUNCTION_1"
], customize)
continue
elif opname == 'LOOKUP_METHOD':
# A PyPy speciality - DRY with parse3
self.add_unique_rule("load_attr ::= expr LOOKUP_METHOD",
@@ -392,6 +404,7 @@ class Python2Parser(PythonParser):
('expr '*v, opname))], customize)
elif prev_tok == 'LOAD_SETCOMP':
self.add_unique_rules([
"expr ::= setcomp",
('setcomp ::= %s load_closure LOAD_SETCOMP %s expr'
' GET_ITER CALL_FUNCTION_1' %
('expr '*v, opname))

3
uncompyle6/parsers/parse26.py
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@@ -142,7 +142,6 @@ class Python26Parser(Python2Parser):
whilestmt ::= SETUP_LOOP testexpr l_stmts_opt jb_pop POP_BLOCK _come_from
whilestmt ::= SETUP_LOOP testexpr l_stmts_opt jb_cf_pop bp_come_from
whilestmt ::= SETUP_LOOP testexpr return_stmts come_froms POP_TOP bp_come_from
whilestmt ::= SETUP_LOOP testexpr return_stmts POP_BLOCK COME_FROM
whileelsestmt ::= SETUP_LOOP testexpr l_stmts_opt jb_pop POP_BLOCK
@@ -253,8 +252,6 @@ class Python26Parser(Python2Parser):
return_if_lambda ::= RETURN_END_IF_LAMBDA POP_TOP
conditional_lambda ::= expr jmp_false_then expr return_if_lambda
return_stmt_lambda LAMBDA_MARKER
kvlist ::= kvlist kv3
kv3 ::= expr expr STORE_MAP
"""
def add_custom_rules(self, tokens, customize):

1
uncompyle6/parsers/parse27.py
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@@ -113,7 +113,6 @@ class Python27Parser(Python2Parser):
return_if_lambda ::= RETURN_END_IF_LAMBDA COME_FROM
conditional_lambda ::= expr jmp_false expr return_if_lambda
return_stmt_lambda LAMBDA_MARKER
kvlist ::= kvlist kv3
kv3 ::= expr expr STORE_MAP
"""

2
uncompyle6/parsers/parse3.py
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@@ -809,6 +809,8 @@ class Python3Parser(PythonParser):
seen_LOAD_SETCOMP = True
# Should this be generalized and put under MAKE_FUNCTION?
if has_get_iter_call_function1:
self.add_unique_rule("expr ::= setcomp",
opname, token.attr, customize)
rule_pat = ("setcomp ::= LOAD_SETCOMP %sMAKE_FUNCTION_0 expr "
"GET_ITER CALL_FUNCTION_1")
self.add_make_function_rule(rule_pat, opname, token.attr, customize)

2
uncompyle6/scanners/scanner2.py
View File

@@ -260,6 +260,8 @@ class Scanner2(Scanner):
customize[op_name] = 0
elif op == self.opc.CONTINUE_LOOP:
customize[op_name] = 0
elif op_name == 'LOAD_SETCOMP':
customize[op_name] = 0
elif op == self.opc.JUMP_ABSOLUTE:
# Further classify JUMP_ABSOLUTE into backward jumps
# which are used in loops, and "CONTINUE" jumps which