tools/lexer_generator/code_generator.py - Issue 139303002: Experimental parser: elide cursor reads in some cases

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Unified Diff: tools/lexer_generator/code_generator.py

Issue 139303002: Experimental parser: elide cursor reads in some cases (Closed) Base URL: https://v8.googlecode.com/svn/branches/experimental/parser

Patch Set: Created 6 years, 11 months ago

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Index: tools/lexer_generator/code_generator.py

diff --git a/tools/lexer_generator/code_generator.py b/tools/lexer_generator/code_generator.py

index 5f02ebb33899df636d9a1a83e6eb9831ad836036..d503a1dc67373a96469749366abf6a7406ae3616 100644

--- a/tools/lexer_generator/code_generator.py

+++ b/tools/lexer_generator/code_generator.py

@@ -99,6 +99,7 @@ class CodeGenerator:

'node_number' : None,

'original_node_number' : state.node_number(),

'transitions' : transitions,

+ 'can_elide_read' : len(transitions) == 0,

'switch_transitions' : [],

'deferred_transitions' : [],

'long_char_transitions' : [],

@@ -286,6 +287,9 @@ class CodeGenerator:

state['match_action'] = (state['match_action'][0], value)

if state['match_action'][0] != 'goto_start':

states[value[-1]]['entry_points']['after_entry_code'] = True

+ state['can_elide_read'] = False

+ else:

+ states[value[-1]]['can_elide_read'] = False

@staticmethod

def __mark_entry_points(dfa_states):

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