Add support for inline namespaces

cxxheaderparser/parser.py

@@ -284,6 +284,7 @@ class CxxParser:
             "alignas": self._consume_attribute_specifier_seq,
             "extern": self._parse_extern,
             "friend": self._parse_friend_decl,
+            "inline": self._parse_inline,
             "namespace": self._parse_namespace,
             "private": self._process_access_specifier,
             "protected": self._process_access_specifier,
@@ -398,6 +399,9 @@ class CxxParser:
 
                 tok = self._next_token_must_be("NAME")
 
+        if inline and len(names) > 1:
+            raise CxxParseError("a nested namespace definition cannot be inline")
+
         # TODO: namespace_alias_definition
 
         ns = NamespaceDecl(names, inline)

cxxheaderparser/simple.py

@@ -91,6 +91,7 @@ class NamespaceScope:
     """
 
     name: str = ""
+    inline: bool = False
 
     classes: typing.List["ClassScope"] = field(default_factory=list)
     enums: typing.List[EnumDecl] = field(default_factory=list)
@@ -248,6 +249,9 @@ class SimpleCxxVisitor:
 
         assert ns is not None
 
+        # only set inline on inner namespace
+        ns.inline = state.namespace.inline
+
         self.block = ns
         self.namespace = ns