[mycpp] Translate AsdlType.Create() -> AsdlType::Create()

It works in mycpp/examples/parse!

build/py.sh

@@ -186,7 +186,7 @@ py-codegen() {
   gen-asdl-py 'frontend/syntax.asdl' 'frontend.syntax_abbrev'
 
   # For tests
-  gen-asdl-py 'mycpp/examples/expr.asdl'
+  gen-asdl-py 'mycpp/examples/expr.asdl' --init-zero-N
 }
 
 py-asdl-examples() {

mycpp/NINJA_subgraph.py

@@ -89,7 +89,10 @@ def DefineTargets(ru):
         phony_prefix = 'mycpp-unit')
 
   # ASDL schema that examples/parse.py depends on
-  ru.asdl_library('mycpp/examples/expr.asdl')
+  ru.asdl_library(
+      'mycpp/examples/expr.asdl',
+      init_zero_n = True,
+      )
 
 
 #

mycpp/cppgen_pass.py

@@ -563,14 +563,19 @@ def visit_member_expr(self, o: 'mypy.nodes.MemberExpr') -> T:
             # self.log('member o = %s, o.expr = %s', o, o.expr)
             pass
 
-          # This is an approximate hack that assumes that locals don't shadow
-          # imported names.  Might be a problem with names like 'word'?
-          if (isinstance(o.expr, NameExpr) and (
+          is_asdl = o.name == 'Create'  # hack for MyType.Create()
+
+          is_module = isinstance(o.expr, NameExpr) and (
               o.expr.name in self.imported_names or
               o.expr.name in ('mylib', 'libc', 'posix', 'fcntl_',
-                              'time_', 'termios', 'signal_', 'fanos') or
-              o.name == '__init__'
-              )):
+                              'time_', 'termios', 'signal_', 'fanos')
+          )
+          # TODO: Do we need this?
+          is_init = o.name == '__init__'
+
+          # This is an approximate hack that assumes that locals don't shadow
+          # imported names.  Might be a problem with names like 'word'?
+          if is_asdl or is_module or is_init:
             op = '::'
           else:
             op = '->'  # Everything is a pointer

mycpp/examples/parse.py

@@ -14,6 +14,7 @@
 from mycpp.mylib import log, tagswitch
 from mycpp import mylib
 from _devbuild.gen.expr_asdl import (
+    expr,
     expr_e,  # for translation only?
     expr_t, expr__Var, expr__Const, expr__Binary, tok_e, tok_t
 )
@@ -150,8 +151,10 @@ def Parse(self):
     return self.ParseExpr()
 
 
-def run_tests():
+
+def TestParse():
   # type: () -> None
+
   lex = Lexer('abc')
   while True:
     tok_type, tok_val = lex.Read()
@@ -207,6 +210,37 @@ def run_tests():
         log('Other')
 
 
+def TestCreate():
+  # type: () -> None
+
+  c = expr.Const.Create()
+  log('c.i %d', c.i)
+
+  v = expr.Var.Create()
+  log('v.name %r', v.name)
+
+  b = expr.Binary.Create()
+  log('b.op %r', b.op)
+  b.op = '+'
+
+  # Must assign these
+  b.left = c
+  b.right = v
+
+  htree = b.PrettyTree()
+  ast_f = fmt.AnsiOutput(mylib.Stdout())
+
+  fmt.PrintTree(htree, ast_f)
+  ast_f.write('\n')
+
+
+def run_tests():
+  # type: () -> None
+
+  TestParse()
+  TestCreate()
+
+
 def run_benchmarks():
   # type: () -> None
   n = 100000