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Code Transpiler Tool - Transpile cơ bản giữa Python/JS/Rust.
Author: Hieu Louis (2026)
Hỗ trợ:
- python → javascript (AST-based, subset: function/return/assign/print/expr/binop)
- python → rust (AST-based, subset: fn/let/return/print)
- javascript → python (regex-based, subset: function/var-let-const/console.log)
Đây là transpiler đơn giản, KHÔNG phải production-grade. Chỉ minh hoạ
ý tưởng AST transformation và regex substitution.
"""
from __future__ import annotations
import ast
import re
from typing import Any, Dict, List, Optional
from .base import Tool, ToolResult, ToolContext, ToolCategory, ToolSafety
SUPPORTED_PAIRS = {
"python_to_javascript",
"python_to_rust",
"javascript_to_python",
}
# ---------------------------------------------------------------------------
# Python → JavaScript
# ---------------------------------------------------------------------------
class _PyToJSVisitor(ast.NodeVisitor):
"""Transpile Python AST subset → JavaScript."""
def __init__(self) -> None:
self.lines: List[str] = []
self._indent = 0
def _pad(self) -> str:
return " " * self._indent
def visit_Module(self, node: ast.Module) -> None:
for stmt in node.body:
self.visit(stmt)
def visit_FunctionDef(self, node: ast.FunctionDef) -> None:
params = ", ".join(a.arg for a in node.args.args)
self.lines.append(f"{self._pad()}function {node.name}({params}) {{")
self._indent += 1
for stmt in node.body:
self.visit(stmt)
self._indent -= 1
self.lines.append(f"{self._pad()}}}")
def visit_Return(self, node: ast.Return) -> None:
val = self._expr(node.value) if node.value else ""
self.lines.append(f"{self._pad()}return {val};")
def visit_Assign(self, node: ast.Assign) -> None:
target = self._expr(node.targets[0])
val = self._expr(node.value)
self.lines.append(f"{self._pad()}let {target} = {val};")
def visit_Expr(self, node: ast.Expr) -> None:
if (isinstance(node.value, ast.Call)
and isinstance(node.value.func, ast.Name)
and node.value.func.id == "print"):
args = ", ".join(self._expr(a) for a in node.value.args)
self.lines.append(f"{self._pad()}console.log({args});")
else:
self.lines.append(f"{self._pad()}{self._expr(node.value)};")
def _expr(self, node: Optional[ast.AST]) -> str:
if node is None:
return ""
if isinstance(node, ast.Constant):
if isinstance(node.value, str):
return f'"{node.value}"'
return repr(node.value)
if isinstance(node, ast.Name):
return node.id
if isinstance(node, ast.BinOp):
return f"({self._expr(node.left)} {self._op(node.op)} {self._expr(node.right)})"
if isinstance(node, ast.Call):
args = ", ".join(self._expr(a) for a in node.args)
return f"{self._expr(node.func)}({args})"
return ast.unparse(node)
@staticmethod
def _op(op: ast.AST) -> str:
if isinstance(op, ast.Add): return "+"
if isinstance(op, ast.Sub): return "-"
if isinstance(op, ast.Mult): return "*"
if isinstance(op, ast.Div): return "/"
if isinstance(op, ast.Mod): return "%"
return "?"
# ---------------------------------------------------------------------------
# Python → Rust
# ---------------------------------------------------------------------------
class _PyToRustVisitor(ast.NodeVisitor):
"""Transpile Python AST subset → Rust (i32 typed)."""
def __init__(self) -> None:
self.lines: List[str] = []
self._indent = 0
def _pad(self) -> str:
return " " * self._indent
def visit_Module(self, node: ast.Module) -> None:
self.lines.append("fn main() {")
self._indent += 1
for stmt in node.body:
if not isinstance(stmt, ast.FunctionDef):
self.visit(stmt)
self._indent -= 1
self.lines.append("}")
# Top-level functions after main
for stmt in node.body:
if isinstance(stmt, ast.FunctionDef):
self.visit(stmt)
def visit_FunctionDef(self, node: ast.FunctionDef) -> None:
params = ", ".join(f"{a.arg}: i32" for a in node.args.args)
self.lines.append(f"fn {node.name}({params}) -> i32 {{")
self._indent += 1
for stmt in node.body:
self.visit(stmt)
self._indent -= 1
self.lines.append(f"{self._pad()}}}")
def visit_Return(self, node: ast.Return) -> None:
val = self._expr(node.value) if node.value else "0"
self.lines.append(f"{self._pad()}return {val};")
def visit_Assign(self, node: ast.Assign) -> None:
target = self._expr(node.targets[0])
val = self._expr(node.value)
self.lines.append(f"{self._pad()}let {target} = {val};")
def visit_Expr(self, node: ast.Expr) -> None:
if (isinstance(node.value, ast.Call)
and isinstance(node.value.func, ast.Name)
and node.value.func.id == "print"):
args = ", ".join(self._expr(a) for a in node.value.args)
self.lines.append(f'{self._pad()}println!("{{:?}}", {args});')
else:
self.lines.append(f"{self._pad()}{self._expr(node.value)};")
def _expr(self, node: Optional[ast.AST]) -> str:
if node is None:
return ""
if isinstance(node, ast.Constant):
if isinstance(node.value, str):
return f'"{node.value}"'
return repr(node.value)
if isinstance(node, ast.Name):
return node.id
if isinstance(node, ast.BinOp):
return f"({self._expr(node.left)} {self._op(node.op)} {self._expr(node.right)})"
if isinstance(node, ast.Call):
args = ", ".join(self._expr(a) for a in node.args)
return f"{self._expr(node.func)}({args})"
return ast.unparse(node)
@staticmethod
def _op(op: ast.AST) -> str:
if isinstance(op, ast.Add): return "+"
if isinstance(op, ast.Sub): return "-"
if isinstance(op, ast.Mult): return "*"
if isinstance(op, ast.Div): return "/"
if isinstance(op, ast.Mod): return "%"
return "?"
# ---------------------------------------------------------------------------
# JavaScript → Python (regex)
# ---------------------------------------------------------------------------
def _js_to_python(code: str) -> str:
"""Transpile JS subset → Python bằng regex."""
out = code
# function name(params) { → def name(params):
out = re.sub(r"function\s+(\w+)\s*\(([^)]*)\)\s*{", r"def \1(\2):", out)
# var/let/const x = ...; → x = ...
out = re.sub(r"\b(?:var|let|const)\s+(\w+)\s*=\s*", r"\1 = ", out)
# console.log(...) → print(...)
out = re.sub(r"console\.log\s*\(", "print(", out)
# return ...; → return ...
out = re.sub(r"return\s+(.*?);", r"return \1", out)
# Loại bỏ dấu ; cuối dòng
out = re.sub(r";\s*$", "", out, flags=re.MULTILINE)
# Đóng block: } → pass (đơn giản)
out = re.sub(r"^\s*}\s*$", " pass", out, flags=re.MULTILINE)
return out
# ---------------------------------------------------------------------------
# Tool
# ---------------------------------------------------------------------------
class CodeTranspilerTool(Tool):
"""Transpile giữa Python/JS/Rust (basic AST + regex)."""
category = ToolCategory.CODE
safety = ToolSafety.MODERATE
requires_confirmation = True
@property
def name(self) -> str:
return "code_transpiler"
@property
def description(self) -> str:
return (
"Transpile code giữa Python/JavaScript/Rust (basic, AST + regex). "
"Hỗ trợ: python→javascript, python→rust, javascript→python."
)
@property
def parameters(self) -> Dict[str, Any]:
return {
"type": "object",
"properties": {
"code": {"type": "string", "description": "Source code cần transpile"},
"from_lang": {
"type": "string",
"enum": ["python", "javascript"],
"description": "Ngôn ngữ nguồn",
},
"to_lang": {
"type": "string",
"enum": ["python", "javascript", "rust"],
"description": "Ngôn ngữ đích",
},
},
"required": ["code", "from_lang", "to_lang"],
}
def validate_args(self, args: Dict[str, Any]) -> Optional[str]:
if not args.get("code"):
return "Missing required arg: code"
fl = args.get("from_lang")
tl = args.get("to_lang")
if not fl:
return "Missing required arg: from_lang"
if not tl:
return "Missing required arg: to_lang"
pair = f"{fl}_to_{tl}"
if pair not in SUPPORTED_PAIRS:
return (
f"Unsupported transpile pair: {pair}. "
f"Hỗ trợ: {sorted(SUPPORTED_PAIRS)}"
)
return None
def execute(self, args: Dict[str, Any], context: ToolContext) -> ToolResult:
code: str = args["code"]
fl: str = args["from_lang"]
tl: str = args["to_lang"]
try:
if fl == "python" and tl == "javascript":
tree = ast.parse(code)
v = _PyToJSVisitor()
v.visit(tree)
transpiled = "\n".join(v.lines)
elif fl == "python" and tl == "rust":
tree = ast.parse(code)
v = _PyToRustVisitor()
v.visit(tree)
transpiled = "\n".join(v.lines)
elif fl == "javascript" and tl == "python":
transpiled = _js_to_python(code)
else:
return ToolResult(success=False, error="Unsupported pair", return_code=1)
except SyntaxError as e:
return ToolResult(
success=False,
error=f"SyntaxError: {e.msg} (line {e.lineno})",
return_code=1,
)
except Exception as e:
return ToolResult(success=False, error=f"{type(e).__name__}: {e}", return_code=1)
return ToolResult(
success=True,
output=transpiled,
metadata={
"from_lang": fl,
"to_lang": tl,
"input_length": len(code),
"output_length": len(transpiled),
},
)
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