fix parsing empty string literal (#409)

* fix parsing empty string literal Signed-off-by: Dirk Thomas <dirk-thomas@users.noreply.github.com> * add annotation with empty string literal parameter Signed-off-by: Dirk Thomas <dirk-thomas@users.noreply.github.com>
ros2 · Sep 9, 2019 · f445d96 · f445d96
1 parent c488b81
commit f445d96
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diff --git a/rosidl_parser/rosidl_parser/parser.py b/rosidl_parser/rosidl_parser/parser.py
@@ -589,6 +589,8 @@ def get_floating_pt_literal_value(floating_pt_literal):
 
 
 def get_string_literal_value(string_literal, *, allow_unicode=False):
+    if len(string_literal.children) == 0:
+        return ''
     assert len(string_literal.children) == 1
     child = string_literal.children[0]
     assert isinstance(child, Token)

diff --git a/rosidl_parser/test/msg/MyMessage.idl b/rosidl_parser/test/msg/MyMessage.idl
@@ -20,6 +20,7 @@ module rosidl_parser {
       @key
       @range ( min=-10, max=10 )
       long long_value;
+      @verbatim (language="comment", text="")
       unsigned long unsigned_long_value;
       long long long_long_value;
       unsigned long long unsigned_long_long_value;