From 10a674fe1d1a2ca1918b1f80c48ca94592821aa7 Mon Sep 17 00:00:00 2001
From: Jellyfrog <Jellyfrog@users.noreply.github.com>
Date: Thu, 22 Jan 2026 00:01:10 +0100
Subject: [PATCH] fix: tolerate lowercase type identifiers in SEQUENCE OF

Add relaxed grammar option to handle MIB files that incorrectly use
lowercase type identifiers in SEQUENCE OF declarations.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 pysmi/lexer/smi.py      |  1 +
 pysmi/parser/dialect.py |  1 +
 pysmi/parser/smi.py     | 11 +++++++++++
 3 files changed, 13 insertions(+)

diff --git a/pysmi/lexer/smi.py b/pysmi/lexer/smi.py
index 43455db..5fee7f6 100644
--- a/pysmi/lexer/smi.py
+++ b/pysmi/lexer/smi.py
@@ -534,6 +534,7 @@ def tokens():
     "lowcaseIdentifier": [],
     "curlyBracesAroundEnterpriseInTrap": [],
     "noCells": [],
+    "lowcaseTypeIdentifier": [],
 }
 
 
diff --git a/pysmi/parser/dialect.py b/pysmi/parser/dialect.py
index cd7b7e6..650b9db 100644
--- a/pysmi/parser/dialect.py
+++ b/pysmi/parser/dialect.py
@@ -26,6 +26,7 @@
     lowcaseIdentifier=True,
     curlyBracesAroundEnterpriseInTrap=True,
     noCells=True,
+    lowcaseTypeIdentifier=True,
 )
 
 # Compatibility API
diff --git a/pysmi/parser/smi.py b/pysmi/parser/smi.py
index 5ae4273..5754afe 100644
--- a/pysmi/parser/smi.py
+++ b/pysmi/parser/smi.py
@@ -1420,6 +1420,15 @@ def p_CreationPart(self, p):
             p[0] = (p[1], p[3])
 
 
+# noinspection PyIncorrectDocstring
+class LowcaseTypeIdentifier:
+    # common mistake - lowercase type identifier in SEQUENCE OF
+    @staticmethod
+    def p_row(self, p):
+        """row : fuzzy_lowercase_identifier"""
+        p[0] = ('row', p[1])
+
+
 relaxedGrammar = {
     "supportSmiV1Keywords": [
         SupportSmiV1Keywords.p_importedKeyword,
@@ -1438,6 +1447,7 @@ def p_CreationPart(self, p):
         CurlyBracesInEnterprises.p_EnterprisePart,
     ],
     "noCells": [NoCells.p_CreationPart],
+    "lowcaseTypeIdentifier": [LowcaseTypeIdentifier.p_row],
 }
 
 
@@ -1464,6 +1474,7 @@ def parserFactory(**grammarOptions):
         * lowcaseIdentifier - tolerate lowercase MIB identifiers
         * curlyBracesAroundEnterpriseInTrap - tolerate curly braces around enterprise ID in TRAP MACRO
         * noCells - tolerate missing cells (XXX)
+        * lowcaseTypeIdentifier - tolerate lowercase type identifiers in SEQUENCE OF
 
     Examples: