ASDL
1 program
Added 2026-03-13T04:57:17Z
Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled
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Aliases: Abstract Syntax Description Language, Zephyr ASDL
Provenance: commit f6d0847deb · authored 2026-03-13T05:57:45+01:00 · agent claude-code · model claude-sonnet-4-6
Sources mentioning this language
3 sources · pl_id:
pl/zephyr-asdlRelated languages
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Gathered by LLM agents during the experiment that started this catalogue. They are not verified: the agent names an origin, but a program can be altered or invented — an audit found one attributed to a file that does not exist, in a syntax the language does not have. Prefer the programs archived by Software Heritage above. The catalogue's goal is the languages themselves, grounded in sources (PLDB, Wikipedia, Rosetta Code, …), with real archived programs; these examples may be dropped.
Python AST Grammar
Provenance: commit f6d0847deb · authored 2026-03-13T05:57:45+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled
-- ASDL's 4 built-in types are:
-- identifier, int, string, constant
module Python
{
mod = Module(stmt* body, type_ignore* type_ignores)
| Interactive(stmt* body)
| Expression(expr body)
| FunctionType(expr* argtypes, expr returns)
stmt = FunctionDef(identifier name, arguments args,
stmt* body, expr* decorator_list, expr? returns,
string? type_comment)
| AsyncFunctionDef(identifier name, arguments args,
stmt* body, expr* decorator_list, expr? returns,
string? type_comment)
| ClassDef(identifier name,
expr* bases,
keyword* keywords,
stmt* body,
expr* decorator_list)
| Return(expr? value)
| Delete(expr* targets)
| Assign(expr* targets, expr value, string? type_comment)
| AugAssign(expr target, operator op, expr value)
| AnnAssign(expr target, expr annotation, expr? value, int simple)
expr = BoolOp(boolop op, expr* values)
| NamedExpr(expr target, expr value)
| BinOp(expr left, operator op, expr right)
| UnaryOp(unaryop op, expr operand)
| Lambda(arguments args, expr body)
| IfExp(expr test, expr body, expr orelse)
| Dict(expr* keys, expr* values)
| Set(expr* elts)
| ListComp(expr elt, comprehension* generators)
| Constant(constant value, string? kind)
| Name(identifier id, expr_context ctx)
| List(expr* elts, expr_context ctx)
| Tuple(expr* elts, expr_context ctx)
boolop = And | Or
operator = Add | Sub | Mult | MatMult | Div | Mod | Pow | LShift
| RShift | BitOr | BitXor | BitAnd | FloorDiv
unaryop = Invert | Not | UAdd | USub
cmpop = Eq | NotEq | Lt | LtE | Gt | GtE | Is | IsNot | In | NotIn
expr_context = Load | Store | Del
comprehension = (expr target, expr iter, expr* ifs, int is_async)
arguments = (arg* posonlyargs, arg* args, arg? vararg, arg* kwonlyargs,
expr* kw_defaults, arg? kwarg, expr* defaults)
arg = (identifier arg, expr? annotation, string? type_comment)
attributes (int lineno, int col_offset, int? end_lineno,
int? end_col_offset)
type_ignore = TypeIgnore(int lineno, string tag)
}