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Support backslash line continuations in lark.lark #1626

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Merged
erezsh merged 1 commit into from
Aug 25, 2026
+11 −0
Merged

Support backslash line continuations in lark.lark #1626

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3 changes: 3 additions & 0 deletions lark/grammars/lark.lark
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Original file line number Diff line number Diff line change
Expand Up @@ -58,5 +58,8 @@ _NL: /(\r?\n)+\s*/

COMMENT: /\s*/ "//" /[^\n]/* | /\s*/ "#" /[^\n]/*

BACKSLASH: /\\[ ]*\n/

%ignore WS_INLINE
%ignore COMMENT
%ignore BACKSLASH
8 changes: 8 additions & 0 deletions tests/test_grammar.py
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Expand Up @@ -328,6 +328,14 @@ def test_line_breaks(self):
p.parse('ab')


def test_line_breaks_in_lark_lark(self):
# The `lark.lark` meta-grammar must accept line continuations too
lark_lark = Lark.open_from_package('lark', 'lark.lark', ('grammars',), parser='lalr')
lark_lark.parse(r"""start: "a" \
"b"
""")


def test_symbol_eq(self):
a = None
b = Symbol("abc")
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