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Added parse_lark_grammar.py and the syntax parameter/registry #1019

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Added parse_lark_grammar.py and the syntax parameter/registry #1019

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7 changes: 6 additions & 1 deletion lark/lark.py
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,7 @@ class LarkOptions(Serialize):
edit_terminals: Optional[Callable[[TerminalDef], TerminalDef]]
import_paths: 'List[Union[str, Callable[[Union[None, str, PackageResource], str], Tuple[str, str]]]]'
source_path: Optional[str]
syntax: Union[str, Callable[[str, str], Tree]]

OPTIONS_DOC = """
**=== General Options ===**
Expand Down Expand Up @@ -136,6 +137,9 @@ class LarkOptions(Serialize):
A List of either paths or loader functions to specify from where grammars are imported
source_path
Override the source of from where the grammar was loaded. Useful for relative imports and unconventional grammar loading
syntax
Select the syntax with which the grammar is parsed. Either a function or a registered syntax
(default guess based on extension / uses lark when that fails)
**=== End of Options ===**
"""
if __doc__:
Expand Down Expand Up @@ -169,6 +173,7 @@ class LarkOptions(Serialize):
'use_bytes': False,
'import_paths': [],
'source_path': None,
'syntax': None
}

def __init__(self, options_dict):
Expand Down Expand Up @@ -328,7 +333,7 @@ def __init__(self, grammar: 'Union[Grammar, str, IO[str]]', **options) -> None:


# Parse the grammar file and compose the grammars
self.grammar, used_files = load_grammar(grammar, self.source_path, self.options.import_paths, self.options.keep_all_tokens)
self.grammar, used_files = load_grammar(grammar, self.source_path, self.options)
else:
assert isinstance(grammar, Grammar)
self.grammar = grammar
Expand Down
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