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"""Dispatcher used when transforming a mypy AST to the IR form.
mypyc.irbuild.builder and mypyc.irbuild.main are closely related.
"""
from typing_extensions import NoReturn
from mypy.nodes import (
MypyFile, FuncDef, ReturnStmt, AssignmentStmt, OpExpr,
IntExpr, NameExpr, Var, IfStmt, UnaryExpr, ComparisonExpr, WhileStmt, CallExpr,
IndexExpr, Block, ListExpr, ExpressionStmt, MemberExpr, ForStmt,
BreakStmt, ContinueStmt, ConditionalExpr, OperatorAssignmentStmt, TupleExpr, ClassDef,
Import, ImportFrom, ImportAll, DictExpr, StrExpr, CastExpr, TempNode,
PassStmt, PromoteExpr, AssignmentExpr, AwaitExpr, BackquoteExpr, AssertStmt, BytesExpr,
ComplexExpr, Decorator, DelStmt, DictionaryComprehension, EllipsisExpr, EnumCallExpr, ExecStmt,
FloatExpr, GeneratorExpr, GlobalDecl, LambdaExpr, ListComprehension, SetComprehension,
NamedTupleExpr, NewTypeExpr, NonlocalDecl, OverloadedFuncDef, PrintStmt, RaiseStmt,
RevealExpr, SetExpr, SliceExpr, StarExpr, SuperExpr, TryStmt, TypeAliasExpr, TypeApplication,
TypeVarExpr, TypedDictExpr, UnicodeExpr, WithStmt, YieldFromExpr, YieldExpr, ParamSpecExpr,
MatchStmt
)
from mypyc.ir.ops import Value
from mypyc.irbuild.builder import IRVisitor, IRBuilder, UnsupportedException
from mypyc.irbuild.classdef import transform_class_def
from mypyc.irbuild.function import (
transform_func_def,
transform_overloaded_func_def,
transform_decorator,
transform_lambda_expr,
transform_yield_expr,
transform_yield_from_expr,
transform_await_expr,
)
from mypyc.irbuild.statement import (
transform_block,
transform_expression_stmt,
transform_return_stmt,
transform_assignment_stmt,
transform_operator_assignment_stmt,
transform_import,
transform_import_from,
transform_import_all,
transform_if_stmt,
transform_while_stmt,
transform_for_stmt,
transform_break_stmt,
transform_continue_stmt,
transform_raise_stmt,
transform_try_stmt,
transform_with_stmt,
transform_assert_stmt,
transform_del_stmt,
)
from mypyc.irbuild.expression import (
transform_name_expr,
transform_member_expr,
transform_super_expr,
transform_call_expr,
transform_unary_expr,
transform_op_expr,
transform_index_expr,
transform_conditional_expr,
transform_int_expr,
transform_float_expr,
transform_complex_expr,
transform_comparison_expr,
transform_str_expr,
transform_bytes_expr,
transform_ellipsis,
transform_list_expr,
transform_tuple_expr,
transform_dict_expr,
transform_set_expr,
transform_list_comprehension,
transform_set_comprehension,
transform_dictionary_comprehension,
transform_slice_expr,
transform_generator_expr,
transform_assignment_expr,
)
class IRBuilderVisitor(IRVisitor):
"""Mypy node visitor that dispatches to node transform implementations.
This class should have no non-trivial logic.
This visitor is separated from the rest of code to improve modularity and
to avoid import cycles.
This is based on the visitor pattern
(https://en.wikipedia.org/wiki/Visitor_pattern).
"""
# This gets passed to all the implementations and contains all the
# state and many helpers. The attribute is initialized outside
# this class since this class and IRBuilder form a reference loop.
builder: IRBuilder
def visit_mypy_file(self, mypyfile: MypyFile) -> None:
assert False, "use transform_mypy_file instead"
def visit_class_def(self, cdef: ClassDef) -> None:
transform_class_def(self.builder, cdef)
def visit_import(self, node: Import) -> None:
transform_import(self.builder, node)
def visit_import_from(self, node: ImportFrom) -> None:
transform_import_from(self.builder, node)
def visit_import_all(self, node: ImportAll) -> None:
transform_import_all(self.builder, node)
def visit_func_def(self, fdef: FuncDef) -> None:
transform_func_def(self.builder, fdef)
def visit_overloaded_func_def(self, o: OverloadedFuncDef) -> None:
transform_overloaded_func_def(self.builder, o)
def visit_decorator(self, dec: Decorator) -> None:
transform_decorator(self.builder, dec)
def visit_block(self, block: Block) -> None:
transform_block(self.builder, block)
# Statements
def visit_expression_stmt(self, stmt: ExpressionStmt) -> None:
transform_expression_stmt(self.builder, stmt)
def visit_return_stmt(self, stmt: ReturnStmt) -> None:
transform_return_stmt(self.builder, stmt)
def visit_assignment_stmt(self, stmt: AssignmentStmt) -> None:
transform_assignment_stmt(self.builder, stmt)
def visit_operator_assignment_stmt(self, stmt: OperatorAssignmentStmt) -> None:
transform_operator_assignment_stmt(self.builder, stmt)
def visit_if_stmt(self, stmt: IfStmt) -> None:
transform_if_stmt(self.builder, stmt)
def visit_while_stmt(self, stmt: WhileStmt) -> None:
transform_while_stmt(self.builder, stmt)
def visit_for_stmt(self, stmt: ForStmt) -> None:
transform_for_stmt(self.builder, stmt)
def visit_break_stmt(self, stmt: BreakStmt) -> None:
transform_break_stmt(self.builder, stmt)
def visit_continue_stmt(self, stmt: ContinueStmt) -> None:
transform_continue_stmt(self.builder, stmt)
def visit_raise_stmt(self, stmt: RaiseStmt) -> None:
transform_raise_stmt(self.builder, stmt)
def visit_try_stmt(self, stmt: TryStmt) -> None:
transform_try_stmt(self.builder, stmt)
def visit_with_stmt(self, stmt: WithStmt) -> None:
transform_with_stmt(self.builder, stmt)
def visit_pass_stmt(self, stmt: PassStmt) -> None:
pass
def visit_assert_stmt(self, stmt: AssertStmt) -> None:
transform_assert_stmt(self.builder, stmt)
def visit_del_stmt(self, stmt: DelStmt) -> None:
transform_del_stmt(self.builder, stmt)
def visit_global_decl(self, stmt: GlobalDecl) -> None:
# Pure declaration -- no runtime effect
pass
def visit_nonlocal_decl(self, stmt: NonlocalDecl) -> None:
# Pure declaration -- no runtime effect
pass
def visit_match_stmt(self, stmt: MatchStmt) -> None:
self.bail("Match statements are not yet supported", stmt.line)
# Expressions
def visit_name_expr(self, expr: NameExpr) -> Value:
return transform_name_expr(self.builder, expr)
def visit_member_expr(self, expr: MemberExpr) -> Value:
return transform_member_expr(self.builder, expr)
def visit_super_expr(self, expr: SuperExpr) -> Value:
return transform_super_expr(self.builder, expr)
def visit_call_expr(self, expr: CallExpr) -> Value:
return transform_call_expr(self.builder, expr)
def visit_unary_expr(self, expr: UnaryExpr) -> Value:
return transform_unary_expr(self.builder, expr)
def visit_op_expr(self, expr: OpExpr) -> Value:
return transform_op_expr(self.builder, expr)
def visit_index_expr(self, expr: IndexExpr) -> Value:
return transform_index_expr(self.builder, expr)
def visit_conditional_expr(self, expr: ConditionalExpr) -> Value:
return transform_conditional_expr(self.builder, expr)
def visit_comparison_expr(self, expr: ComparisonExpr) -> Value:
return transform_comparison_expr(self.builder, expr)
def visit_int_expr(self, expr: IntExpr) -> Value:
return transform_int_expr(self.builder, expr)
def visit_float_expr(self, expr: FloatExpr) -> Value:
return transform_float_expr(self.builder, expr)
def visit_complex_expr(self, expr: ComplexExpr) -> Value:
return transform_complex_expr(self.builder, expr)
def visit_str_expr(self, expr: StrExpr) -> Value:
return transform_str_expr(self.builder, expr)
def visit_bytes_expr(self, expr: BytesExpr) -> Value:
return transform_bytes_expr(self.builder, expr)
def visit_ellipsis(self, expr: EllipsisExpr) -> Value:
return transform_ellipsis(self.builder, expr)
def visit_list_expr(self, expr: ListExpr) -> Value:
return transform_list_expr(self.builder, expr)
def visit_tuple_expr(self, expr: TupleExpr) -> Value:
return transform_tuple_expr(self.builder, expr)
def visit_dict_expr(self, expr: DictExpr) -> Value:
return transform_dict_expr(self.builder, expr)
def visit_set_expr(self, expr: SetExpr) -> Value:
return transform_set_expr(self.builder, expr)
def visit_list_comprehension(self, expr: ListComprehension) -> Value:
return transform_list_comprehension(self.builder, expr)
def visit_set_comprehension(self, expr: SetComprehension) -> Value:
return transform_set_comprehension(self.builder, expr)
def visit_dictionary_comprehension(self, expr: DictionaryComprehension) -> Value:
return transform_dictionary_comprehension(self.builder, expr)
def visit_slice_expr(self, expr: SliceExpr) -> Value:
return transform_slice_expr(self.builder, expr)
def visit_generator_expr(self, expr: GeneratorExpr) -> Value:
return transform_generator_expr(self.builder, expr)
def visit_lambda_expr(self, expr: LambdaExpr) -> Value:
return transform_lambda_expr(self.builder, expr)
def visit_yield_expr(self, expr: YieldExpr) -> Value:
return transform_yield_expr(self.builder, expr)
def visit_yield_from_expr(self, o: YieldFromExpr) -> Value:
return transform_yield_from_expr(self.builder, o)
def visit_await_expr(self, o: AwaitExpr) -> Value:
return transform_await_expr(self.builder, o)
def visit_assignment_expr(self, o: AssignmentExpr) -> Value:
return transform_assignment_expr(self.builder, o)
# Unimplemented constructs that shouldn't come up because they are py2 only
def visit_backquote_expr(self, o: BackquoteExpr) -> Value:
self.bail("Python 2 features are unsupported", o.line)
def visit_exec_stmt(self, o: ExecStmt) -> None:
self.bail("Python 2 features are unsupported", o.line)
def visit_print_stmt(self, o: PrintStmt) -> None:
self.bail("Python 2 features are unsupported", o.line)
def visit_unicode_expr(self, o: UnicodeExpr) -> Value:
self.bail("Python 2 features are unsupported", o.line)
# Constructs that shouldn't ever show up
def visit_enum_call_expr(self, o: EnumCallExpr) -> Value:
assert False, "can't compile analysis-only expressions"
def visit__promote_expr(self, o: PromoteExpr) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_namedtuple_expr(self, o: NamedTupleExpr) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_newtype_expr(self, o: NewTypeExpr) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_temp_node(self, o: TempNode) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_type_alias_expr(self, o: TypeAliasExpr) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_type_application(self, o: TypeApplication) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_type_var_expr(self, o: TypeVarExpr) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_paramspec_expr(self, o: ParamSpecExpr) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_typeddict_expr(self, o: TypedDictExpr) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_reveal_expr(self, o: RevealExpr) -> Value:
assert False, "can't compile analysis-only expressions"
def visit_var(self, o: Var) -> None:
assert False, "can't compile Var; should have been handled already?"
def visit_cast_expr(self, o: CastExpr) -> Value:
assert False, "CastExpr should have been handled in CallExpr"
def visit_star_expr(self, o: StarExpr) -> Value:
assert False, "should have been handled in Tuple/List/Set/DictExpr or CallExpr"
# Helpers
def bail(self, msg: str, line: int) -> NoReturn:
"""Reports an error and aborts compilation up until the last accept() call
(accept() catches the UnsupportedException and keeps on
processing. This allows errors to be non-blocking without always
needing to write handling for them.
"""
self.builder.error(msg, line)
raise UnsupportedException()
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