From 552e98e8981899dc4f00e2051b4ab8ff1640c66d Mon Sep 17 00:00:00 2001
From: h7x4 <h7x4@nani.wtf>
Date: Mon, 2 Mar 2026 10:34:50 +0900
Subject: [PATCH] lemmatizer/rules/ichidan: add informal conditionals

---
 lib/util/lemmatizer/rules/ichidan_verbs.dart | 33 ++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/lib/util/lemmatizer/rules/ichidan_verbs.dart b/lib/util/lemmatizer/rules/ichidan_verbs.dart
index 7d4f7ab..29a17f7 100644
--- a/lib/util/lemmatizer/rules/ichidan_verbs.dart
+++ b/lib/util/lemmatizer/rules/ichidan_verbs.dart
@@ -173,6 +173,36 @@ final LemmatizationRule ichidanVerbNegativeConditional =
       wordClass: WordClass.ichidanVerb,
     );
 
+final LemmatizationRule ichidanVerbNegativeConditionalVariant1 =
+    LemmatizationRule.simple(
+      name: 'Ichidan verb - negative conditional form (informal variant)',
+      pattern: 'なきゃ',
+      replacement: 'る',
+      lookAheadBehind: _lookBehinds,
+      validChildClasses: [WordClass.ichidanVerb],
+      wordClass: WordClass.ichidanVerb,
+    );
+
+final LemmatizationRule ichidanVerbNegativeConditionalVariant2 =
+    LemmatizationRule.simple(
+      name: 'Ichidan verb - negative conditional form (informal variant)',
+      pattern: 'なくちゃ',
+      replacement: 'る',
+      lookAheadBehind: _lookBehinds,
+      validChildClasses: [WordClass.ichidanVerb],
+      wordClass: WordClass.ichidanVerb,
+    );
+
+final LemmatizationRule ichidanVerbNegativeConditionalVariant3 =
+    LemmatizationRule.simple(
+      name: 'Ichidan verb - negative conditional form (informal variant)',
+      pattern: 'ないと',
+      replacement: 'る',
+      lookAheadBehind: _lookBehinds,
+      validChildClasses: [WordClass.ichidanVerb],
+      wordClass: WordClass.ichidanVerb,
+    );
+
 final LemmatizationRule ichidanVerbNegativeVolitional =
     LemmatizationRule.simple(
       name: 'Ichidan verb - negative volitional form',
@@ -285,6 +315,9 @@ final List<LemmatizationRule> ichidanVerbLemmatizationRules =
       ichidanVerbNegativePast,
       ichidanVerbNegativeTe,
       ichidanVerbNegativeConditional,
+      ichidanVerbNegativeConditionalVariant1,
+      ichidanVerbNegativeConditionalVariant2,
+      ichidanVerbNegativeConditionalVariant3,
       ichidanVerbNegativeVolitional,
       ichidanVerbNegativePotential,
       ichidanVerbNegativePassive,