Fix recursion and add proper discrimination of sync/async functions

rt/examples/fork.cpp

 #include <typon/typon.hpp>
 #include <typon/logger.hpp>
-
+#include <python/builtins.hpp>
+#include <typon/generator.hpp>
 
 using namespace typon;
 

rt/include/python/builtins.hpp

@@ -52,16 +52,10 @@ concept PyNext = requires(T t) {
 struct {
   template <PyNext T>
   std::optional<typename T::value_type>
-  sync(T &t, std::optional<typename T::value_type> def = std::nullopt) {
+  operator()(T &t, std::optional<typename T::value_type> def = std::nullopt) {
     auto opt = t.py_next();
     return opt ? opt : def;
   }
-
-  template <PyNext T>
-  auto operator()(T &t, std::optional<typename T::value_type> def = std::nullopt)
-  -> typon::Task<decltype(sync(t, def))> {
-    co_return sync(t, def);
-  }
 } next;
 
 template <typename T>
@@ -69,7 +63,7 @@ std::ostream &operator<<(std::ostream &os, std::optional<T> const &opt) {
   return opt ? os << opt.value() : os << "None";
 }
 
-typon::Task<bool> is_cpp() { co_return true; }
+bool is_cpp() { return true; }
 
 class NoneType {
 public:

rt/include/python/builtins/print.hpp

@@ -50,19 +50,14 @@ typon::Task<void> print(T const &head, Args const &...args) {
 }*/
 
 struct {
-  void sync() { std::cout << '\n'; }
+  void operator()() { std::cout << '\n'; }
 
   template <Printable T, Printable... Args>
-  void sync(T const &head, Args const &...args) {
+  void operator()(T const &head, Args const &...args) {
     print_to(head, std::cout);
     (((std::cout << ' '), print_to(args, std::cout)), ...);
     std::cout << '\n';
   }
-
-  template<Printable... Args>
-  typon::Task<void> operator()(Args const &...args) {
-    co_return sync(args...);
-  }
 } print;
 //typon::Task<void> print() { std::cout << '\n'; co_return; }
 #endif // TYPON_PRINT_HPP

trans/test_runner.py

@@ -28,6 +28,8 @@ def run_tests():
         ]
         if alt := environ.get("ALT_RUNNER"):
             commands.append(alt.format(name_bin=name_bin, name_cpp_posix=name_cpp.as_posix()))
+        else:
+            print("no ALT_RUNNER")
         for cmd in commands:
             if system(cmd) != 0:
                 print(f"Error running command: {cmd}")

trans/tests/naive_fibonacci_accelerated_fork.py

@@ -7,17 +7,17 @@ def fibo(n: int) -> int:
     b = fibo(n - 2)
     return a + b
 
-def parallel_fibo(n: int) -> int:
-    if n < 2:
-        return n
-    if n < 25:
-        a = fibo(n - 1)
-        b = fibo(n - 2)
-        return a + b
-    x = fork(lambda: fibo(n - 1))
-    y = fork(lambda: fibo(n - 2))
-    sync()
-    return x.get() + y.get()
+# def parallel_fibo(n: int) -> int:
+#     if n < 2:
+#         return n
+#     if n < 25:
+#         a = fibo(n - 1)
+#         b = fibo(n - 2)
+#         return a + b
+#     x = fork(lambda: fibo(n - 1))
+#     y = fork(lambda: fibo(n - 2))
+#     sync()
+#     return x.get() + y.get()
 
 
 if __name__ == "__main__":

trans/transpiler/phases/emit_cpp/block.py

@@ -120,7 +120,7 @@ class BlockVisitor(NodeVisitor):
                 yield "Join"
             yield f"<decltype(sync({', '.join(names)}))>"
         yield "{"
-        inner_scope = node.scope
+        inner_scope = node.inner_scope
 
         for child in node.body:
             # Python uses module- and function- level scoping. Blocks, like conditionals and loops, do not form scopes

trans/transpiler/phases/emit_cpp/expr.py

@@ -75,13 +75,14 @@ class ExpressionVisitor(NodeVisitor):
 
     def visit_Name(self, node: ast.Name) -> Iterable[str]:
         res = self.fix_name(node.id)
-        if False and (decl := self.scope.get(res)):
-            if decl.kind == VarKind.SELF:
-                res = "(*this)"
-            elif decl.future and CoroutineMode.ASYNC in self.generator:
-                res = f"{res}.get()"
-                if decl.future == "future":
-                    res = "co_await " + res
+        if self.scope.function and (decl := self.scope.get(res)) and decl.type is self.scope.function.obj_type:
+            res = "(*this)"
+            #if decl.kind == VarKind.SELF:
+            #    res = "(*this)"
+            #elif decl.future and CoroutineMode.ASYNC in self.generator:
+            #    res = f"{res}.get()"
+            #    if decl.future == "future":
+            #        res = "co_await " + res
         yield res
 
     def visit_Compare(self, node: ast.Compare) -> Iterable[str]:
@@ -125,7 +126,7 @@ class ExpressionVisitor(NodeVisitor):
                 yield from ()
             return
         # TODO: precedence needed?
-        if CoroutineMode.ASYNC in self.generator:
+        if CoroutineMode.ASYNC in self.generator and node.is_await:
             yield "co_await "
             node.in_await = True
         elif CoroutineMode.FAKE in self.generator:

trans/transpiler/phases/emit_cpp/function.py

@@ -28,7 +28,7 @@ class FunctionVisitor(BlockVisitor):
         yield f"for (auto {node.target.id} : "
         yield from self.expr().visit(node.iter)
         yield ")"
-        yield from self.emit_block(node.scope, node.body)
+        yield from self.emit_block(node.inner_scope, node.body)
         if node.orelse:
             raise NotImplementedError(node, "orelse")
 
@@ -36,13 +36,13 @@ class FunctionVisitor(BlockVisitor):
         yield "if ("
         yield from self.expr().visit(node.test)
         yield ")"
-        yield from self.emit_block(node.scope, node.body)
+        yield from self.emit_block(node.inner_scope, node.body)
         if node.orelse:
             yield "else "
             if isinstance(node.orelse, ast.If):
                 yield from self.visit(node.orelse)
             else:
-                yield from self.emit_block(node.orelse.scope, node.orelse)
+                yield from self.emit_block(node.orelse.inner_scope, node.orelse)
 
     def visit_Return(self, node: ast.Return) -> Iterable[str]:
         if CoroutineMode.ASYNC in self.generator:
@@ -57,7 +57,7 @@ class FunctionVisitor(BlockVisitor):
         yield "while ("
         yield from self.expr().visit(node.test)
         yield ")"
-        yield from self.emit_block(node.scope, node.body)
+        yield from self.emit_block(node.inner_scope, node.body)
         if node.orelse:
             raise NotImplementedError(node, "orelse")
 

trans/transpiler/phases/typing/block.py

@@ -6,7 +6,8 @@ from transpiler.phases.typing.annotations import TypeAnnotationVisitor
 from transpiler.phases.typing.common import ScoperVisitor
 from transpiler.phases.typing.expr import ScoperExprVisitor
 from transpiler.phases.typing.scope import VarDecl, VarKind, ScopeKind
-from transpiler.phases.typing.types import BaseType, TypeVariable, FunctionType, IncompatibleTypesError, TY_MODULE
+from transpiler.phases.typing.types import BaseType, TypeVariable, FunctionType, IncompatibleTypesError, TY_MODULE, \
+    Promise
 
 
 @dataclass
@@ -74,13 +75,13 @@ class ScoperBlockVisitor(ScoperVisitor):
 
     def visit_FunctionDef(self, node: ast.FunctionDef):
         argtypes = [self.visit_annotation(arg.annotation) for arg in node.args.args]
-        rtype = self.visit_annotation(node.returns)
+        rtype = Promise(self.visit_annotation(node.returns))
         ftype = FunctionType(argtypes, rtype)
         self.scope.vars[node.name] = VarDecl(VarKind.LOCAL, ftype)
         scope = self.scope.child(ScopeKind.FUNCTION)
         scope.obj_type = ftype
         scope.function = scope
-        node.scope = scope
+        node.inner_scope = scope
         for arg, ty in zip(node.args.args, argtypes):
             scope.vars[arg.arg] = VarDecl(VarKind.LOCAL, ty)
         for b in node.body:
@@ -92,7 +93,7 @@ class ScoperBlockVisitor(ScoperVisitor):
     def visit_If(self, node: ast.If):
         scope = self.scope.child(ScopeKind.FUNCTION_INNER)
         scope.function = self.scope.function
-        node.scope = scope
+        node.inner_scope = scope
         visitor = ScoperBlockVisitor(scope, self.root_decls)
         for b in node.body:
             visitor.visit(b)
@@ -107,7 +108,7 @@ class ScoperBlockVisitor(ScoperVisitor):
         ftype = fct.obj_type
         assert isinstance(ftype, FunctionType)
         vtype = self.expr().visit(node.value) if node.value else None
-        vtype.unify(ftype.return_type)
+        vtype.unify(ftype.return_type.return_type if isinstance(ftype.return_type, Promise) else ftype.return_type)
 
     def visit_Global(self, node: ast.Global):
         for name in node.names:

trans/transpiler/phases/typing/expr.py

@@ -4,7 +4,7 @@ from typing import List
 from transpiler.phases.typing import ScopeKind, VarDecl, VarKind
 from transpiler.phases.typing.common import ScoperVisitor
 from transpiler.phases.typing.types import IncompatibleTypesError, BaseType, TupleType, TY_STR, TY_BOOL, TY_INT, \
-    TY_COMPLEX, TY_NONE, FunctionType, PyList, TypeVariable, PySet, TypeType, PyDict
+    TY_COMPLEX, TY_NONE, FunctionType, PyList, TypeVariable, PySet, TypeType, PyDict, Promise
 
 DUNDER = {
     ast.Eq: "eq",
@@ -73,7 +73,12 @@ class ScoperExprVisitor(ScoperVisitor):
 
     def visit_Call(self, node: ast.Call) -> BaseType:
         ftype = self.visit(node.func)
-        return self.visit_function_call(ftype, [self.visit(arg) for arg in node.args])
+        rtype = self.visit_function_call(ftype, [self.visit(arg) for arg in node.args])
+        if isinstance(rtype, Promise):
+            node.is_await = True
+            return rtype.return_type
+        node.is_await = False
+        return rtype
 
     def visit_function_call(self, ftype: BaseType, arguments: List[BaseType]):
         if not isinstance(ftype, FunctionType):
@@ -93,7 +98,8 @@ class ScoperExprVisitor(ScoperVisitor):
         scope = self.scope.child(ScopeKind.FUNCTION)
         scope.obj_type = ftype
         scope.function = scope
-        node.scope = scope
+        node.inner_scope = scope
+        node.body.scope = scope
         for arg, ty in zip(node.args.args, argtypes):
             scope.vars[arg.arg] = VarDecl(VarKind.LOCAL, ty)
         decls = {}

trans/transpiler/phases/typing/types.py

@@ -42,6 +42,16 @@ class BaseType(ABC):
     def to_list(self) -> List["BaseType"]:
         return [self]
 
+class MagicType(BaseType):
+    def unify_internal(self, other: "BaseType"):
+        if type(self) is not type(other):
+            raise IncompatibleTypesError()
+
+    def contains_internal(self, other: "BaseType") -> bool:
+        return False
+
+
+
 
 cur_var = 0
 
@@ -68,7 +78,7 @@ class TypeVariable(BaseType):
             self.resolved = other
 
     def contains_internal(self, other: BaseType) -> bool:
-        return self is other
+        return self.resolve() is other.resolve()
 
     def gen_sub(self, this: "BaseType", typevars) -> "Self":
         if match := typevars.get(self.name):
@@ -134,6 +144,10 @@ class FunctionType(TypeOperator):
     def return_type(self):
         return self.args[0]
 
+    @return_type.setter
+    def return_type(self, value):
+        self.args[0] = value
+
     def __str__(self):
         ret, *args = map(str, self.args)
         if self.variadic:
@@ -214,3 +228,11 @@ class ForkResult(TypeOperator):
     @property
     def return_type(self):
         return self.args[0]
+
+class Promise(TypeOperator):
+    def __init__(self, args: BaseType):
+        super().__init__([args], "Promise")
+
+    @property
+    def return_type(self):
+        return self.args[0]
\ No newline at end of file