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Make a proper recovery for only error statements in a suite.

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This commit is contained in:
Dave Halter
2017-07-18 17:53:04 +02:00
parent 6ee986aa45
commit 790bc459ed
7 changed files with 17 additions and 13 deletions
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1
parso/pgen2/grammar.py
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@@ -82,6 +82,7 @@ class Grammar(object):
self.keywords = {}
self.tokens = {}
self.symbol2label = {}
self.label2symbol = {}
self.start = 256
def dump(self, filename):

1
parso/pgen2/pgen.py
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@@ -65,6 +65,7 @@ class ParserGenerator(object):
else:
c.labels.append((c.symbol2number[label], None))
c.symbol2label[label] = ilabel
c.label2symbol[ilabel] = label
return ilabel
else:
# A named token (NAME, NUMBER, STRING)

4
parso/python/grammar27.txt
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@@ -75,9 +75,7 @@ with_stmt: 'with' with_item (',' with_item)* ':' suite
with_item: test ['as' expr]
# NB compile.c makes sure that the default except clause is last
except_clause: 'except' [test [('as' | ',') test]]
# Edit by David Halter: The stmt is now optional. This reflects how Jedi allows
# classes and functions to be empty, which is beneficial for autocompletion.
suite: simple_stmt | NEWLINE INDENT stmt* DEDENT
suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
# Backward compatibility cruft to support:
# [ x for x in lambda: True, lambda: False if x() ]

4
parso/python/grammar34.txt
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@@ -78,9 +78,7 @@ with_stmt: 'with' with_item (',' with_item)* ':' suite
with_item: test ['as' expr]
# NB compile.c makes sure that the default except clause is last
except_clause: 'except' [test ['as' NAME]]
# Edit by David Halter: The stmt is now optional. This reflects how Jedi allows
# classes and functions to be empty, which is beneficial for autocompletion.
suite: simple_stmt | NEWLINE INDENT stmt* DEDENT
suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
test: or_test ['if' or_test 'else' test] | lambdef
test_nocond: or_test | lambdef_nocond

4
parso/python/grammar35.txt
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@@ -84,9 +84,7 @@ with_stmt: 'with' with_item (',' with_item)* ':' suite
with_item: test ['as' expr]
# NB compile.c makes sure that the default except clause is last
except_clause: 'except' [test ['as' NAME]]
# Edit by David Halter: The stmt is now optional. This reflects how Jedi allows
# classes and functions to be empty, which is beneficial for autocompletion.
suite: simple_stmt | NEWLINE INDENT stmt* DEDENT
suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
test: or_test ['if' or_test 'else' test] | lambdef
test_nocond: or_test | lambdef_nocond

5
parso/python/grammar36.txt
View File

@@ -83,10 +83,7 @@ with_stmt: 'with' with_item (',' with_item)* ':' suite
with_item: test ['as' expr]
# NB compile.c makes sure that the default except clause is last
except_clause: 'except' [test ['as' NAME]]
# Edit by Francisco Souza/David Halter: The stmt is now optional. This reflects
# how Jedi allows classes and functions to be empty, which is beneficial for
# autocompletion.
suite: simple_stmt | NEWLINE INDENT stmt* DEDENT
suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
test: or_test ['if' or_test 'else' test] | lambdef
test_nocond: or_test | lambdef_nocond

11
parso/python/parser.py
View File

@@ -221,6 +221,17 @@ class Parser(BaseParser):
error_leaf = tree.PythonErrorLeaf(tok_name[typ].lower(), value, start_pos, prefix)
stack[-1][2][1].append(error_leaf)
if symbol == 'suite':
dfa, state, node = stack[-1]
states, first = dfa
arcs = states[state]
intended_label = pgen_grammar.symbol2label['stmt']
# Introduce a proper state transition. We're basically allowing
# there to be no valid statements inside a suite.
if [x[0] for x in arcs] == [intended_label]:
new_state = arcs[0][1]
stack[-1] = dfa, new_state, node
def _stack_removal(self, pgen_grammar, stack, arcs, start_index, value, start_pos):
failed_stack = False
found = False