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Fix minor issues in Java Grammar #217

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Merged
shubhamugare merged 1 commit into from
Jul 16, 2025
Merged

Fix minor issues in Java Grammar #217

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4 changes: 2 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -44,7 +44,7 @@ Define your own grammar using simple EBNF syntax. Check out our [notebooks direc
| 🔥 Fast grammar-guided generation (as little as 10% generation overhead with Python and Go!) |
| 🤖 Seamlessly work with any HuggingFace Language Model, including Code, Chat, and Instruct models |
| 🖍️ Pass in any CFG in the EBNF format (even large grammars for programming languages like Python and Go!) |
| 📝 Built-in CFGs for **Python, Go, SQL, Math, JSON**, and more! |
| 📝 Built-in CFGs for **Python, Go, Java, SQL, Math, JSON**, and more! |
| 🎲 Sample with any existing decoding strategy (eg. greedy, beam search, nucleus sampling) |


Expand Down Expand Up @@ -148,7 +148,7 @@ print(f"SynCode output:\n{output}")
# }
```

Check more examples of using Python, Go, and other grammars in <a href="#-example-usage">Notebooks</a> and a quick example at
Check more examples of using Python, Go, Java and other grammars in <a href="#-example-usage">Notebooks</a> and a quick example at
&nbsp; [<img align="center" src="https://colab.research.google.com/assets/colab-badge.svg" />](https://colab.research.google.com/drive/1rYm8iehx_qYdtgWmqLkmhIjizhUVTb9E?usp=sharing)

#### Instuct-tuned Models
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25 changes: 10 additions & 15 deletions syncode/parsers/grammars/java.lark
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@@ -1,21 +1,9 @@
start: compilation_unit

%import common.CNAME
%import common.DIGIT
%import common.WS

%ignore WS

LINE_COMMENT: /\/\/[^\n\r]*/
BLOCK_COMMENT: /\/\*[\s\S]*?\*\//

type_parameters: "<" type_parameter ("," type_parameter)* ">"
type_parameter: CNAME type_bound?
type_bound: "extends" type ("&" type)*

%ignore LINE_COMMENT
%ignore BLOCK_COMMENT

compilation_unit: package_declaration? import_declarations? type_declarations?

package_declaration: "package" name ";"
Expand Down Expand Up @@ -188,7 +176,7 @@ floating_point_literal: DIGIT+ "." DIGIT+

boolean_literal: "true" | "false"

character_literal: "'" /[^\\'\n\r]/ "'"
character_literal: /'([^'\r\n\\]|\\([btnfr"'\\0-7]|[0-3]?[0-7]{2})|\\u[0-9a-fA-f]{4})'/

string_literal: /".*?"/

Expand All @@ -206,8 +194,6 @@ dim_expr: "[" expression "]"

dims: "[" "]"+



field_access: primary "." CNAME | "super" "." CNAME

method_invocation: name "(" argument_list? ")" | primary "." CNAME "(" argument_list? ")" | "super" "." CNAME "(" argument_list? ")"
Expand Down Expand Up @@ -289,3 +275,12 @@ reference_type: class_or_interface_type | array_type

array_type: primitive_type dims | name dims | array_type dims

LINE_COMMENT: /\/\/[^\n\r]*/
BLOCK_COMMENT: /\/\*[\s\S]*?\*\//

%import common.CNAME
%import common.DIGIT
%import common.WS
%ignore WS
%ignore LINE_COMMENT
%ignore BLOCK_COMMENT
6 changes: 5 additions & 1 deletion tests/parser/test_grammar_java.py
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Expand Up @@ -388,4 +388,8 @@ def test_java_parser26(self):
public """
r = inc_parser.get_acceptable_next_terminals(partial_code)
assert AcceptSequence(['CLASS']) in r.accept_sequences
assert r.remainder_state == RemainderState.COMPLETE
assert r.remainder_state == RemainderState.COMPLETE

if __name__ == '__main__':
unittest.main()