lib9p: idl.gen: Detect when we try to import a sym that doesn't exist

1 files changed, 6 insertions, 0 deletions

diff --git a/lib9p/idl/__init__.py b/lib9p/idl/__init__.py
index fec6c41..41664f1 100644
--- a/lib9p/idl/__init__.py
+++ b/lib9p/idl/__init__.py
@@ -449,8 +449,10 @@ def parse_file(
                 other_version, other_typs = get_include(m.group("file"))
                 for symname in m.group("syms").split(sep=","):
                     symname = symname.strip()
+                    found = False
                     for typ in other_typs:
                         if typ.name == symname or symname == "*":
+                            found = True
                             match typ:
                                 case Primitive():
                                     pass
@@ -467,6 +469,10 @@ def parse_file(
                                         if other_version in member.in_versions:
                                             member.in_versions.add(version)
                             env[typ.name] = typ
+                    if symname != "*" and not found:
+                        raise ValueError(
+                            f"import: {m.group('file')}: no symbol {repr(symname)}"
+                        )
             elif m := re.fullmatch(re_line_num, line):
                 num = Number()
                 num.name = m.group("name")