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bpo-40334: Support CO_FUTURE_BARRY_AS_BDFL in the new parser (GH-19721)

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This commit also allows to pass flags to the new parser in all interfaces and fixes a bug in the parser generator that was causing to inline rules with actions, making them disappear.
This commit is contained in:
Pablo Galindo 2020-04-27 18:02:07 +01:00 • committed by GitHub
parent 9adccc1384
commit 2b74c835a7
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12 changed files with 578 additions and 468 deletions
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10
Tools/peg_generator/pegen/c_generator.py
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@ -73,9 +73,17 @@ class CCallMakerVisitor(GrammarVisitor):
return "literal", f"_PyPegen_expect_token(p, {type})"
def visit_Rhs(self, node: Rhs) -> Tuple[Optional[str], str]:
def can_we_inline(node):
if len(node.alts) != 1 or len(node.alts[0].items) != 1:
return False
# If the alternative has an action we cannot inline
if getattr(node.alts[0], "action", None) is not None:
return False
return True
if node in self.cache:
return self.cache[node]
if len(node.alts) == 1 and len(node.alts[0].items) == 1:
if can_we_inline(node):
self.cache[node] = self.visit(node.alts[0].items[0])
else:
name = self.gen.name_node(node)