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-rw-r--r--pyGHDL/libghdl/vhdl/nodes.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/pyGHDL/libghdl/vhdl/nodes.py b/pyGHDL/libghdl/vhdl/nodes.py
index f662ad6a7..85c064c37 100644
--- a/pyGHDL/libghdl/vhdl/nodes.py
+++ b/pyGHDL/libghdl/vhdl/nodes.py
@@ -30,6 +30,9 @@ from pyGHDL.libghdl._types import (
from pyGHDL.libghdl.vhdl.tokens import Tok
Null_Iir = 0
+"""
+Null element for an IIR node reference.
+"""
Null_Iir_List = 0
Iir_List_All = 1