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faster: split out recursive sets

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This commit is contained in:
John Doty 2024-04-13 13:20:33 -07:00
parent 44c71b2ea9
commit c5552ab36f
1 changed files with 13 additions and 6 deletions
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19
parser_faster.py
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@ -206,7 +206,7 @@ class GenerateLR0(object):
return tuple(next)
def gen_sets(self, config_set, F):
def gen_sets_recursive(self, config_set, F):
"""Recursively generate all configuration sets starting from the
provided set, and merge them with the provided set 'F'.
"""
@ -215,16 +215,23 @@ class GenerateLR0(object):
else:
new_F = F + (config_set,)
for successor in self.gen_all_successors(config_set):
new_F = self.gen_sets(successor, new_F)
new_F = self.gen_sets_recursive(successor, new_F)
return new_F
def gen_sets(self, config_set):
"""Recursively generate all configuration sets starting from the
provided set, and merge them with the provided set 'F'.
"""
return self.gen_sets_recursive(config_set, ())
def gen_all_sets(self):
"""Generate all of the configuration sets for the grammar."""
initial_set = self.gen_closure(
( Configuration.from_rule(self.grammar[0]), )
)
return self.gen_sets(initial_set, ())
return self.gen_sets(initial_set)
def find_set_index(self, sets, set):
"""Find the specified set in the set of sets, and return the
@ -608,7 +615,7 @@ class GenerateLR1(GenerateSLR1):
initial_set = self.gen_closure(
( Configuration.from_rule(self.grammar[0], lookahead=('$',)), ),
)
return self.gen_sets(initial_set, ())
return self.gen_sets(initial_set)
class GenerateLALR(GenerateLR1):
@ -646,7 +653,7 @@ class GenerateLALR(GenerateLR1):
b_no_la = tuple(s.replace(lookahead=()) for s in b)
return a_no_la == b_no_la
def gen_sets(self, config_set, F):
def gen_sets_recursive(self, config_set, F):
"""Recursively generate all configuration sets starting from the
provided set, and merge them with the provided set 'F'.
@ -666,7 +673,7 @@ class GenerateLALR(GenerateLR1):
# No merge candidate found, proceed.
new_F = F + (config_set,)
for successor in self.gen_all_successors(config_set):
new_F = self.gen_sets(successor, new_F)
new_F = self.gen_sets_recursive(successor, new_F)
return new_F