https://github.com/SamrudhNelli updated 
https://github.com/llvm/llvm-project/pull/181417

>From 5137041232b96451cd140ff157c61498827ca0da Mon Sep 17 00:00:00 2001
From: Samrudh Nelli <[email protected]>
Date: Fri, 13 Feb 2026 22:38:54 +0530
Subject: [PATCH 1/2] fix: Enable horizontal wrapping on longer function
 definitions

Could not figure out how to use the {{^End}} on the just
the inner scope as it would revert to the outer scope with {{End}} set
for the final function.
Hence, reverted to trailing commas for all parameters.

erbtehagf

jket
---
 clang-tools-extra/clang-doc/JSONGenerator.cpp |  7 ++++--
 .../clang-doc/assets/clang-doc-mustache.css   | 22 +++++++++++++++++++
 .../assets/function-template.mustache         |  3 +--
 3 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/clang-tools-extra/clang-doc/JSONGenerator.cpp 
b/clang-tools-extra/clang-doc/JSONGenerator.cpp
index 5051e7e6e690d..c3c14b9ee6f4e 100644
--- a/clang-tools-extra/clang-doc/JSONGenerator.cpp
+++ b/clang-tools-extra/clang-doc/JSONGenerator.cpp
@@ -452,8 +452,7 @@ static void serializeArray(const Container &Records, Object 
&Obj,
     json::Value ItemVal = Object();
     auto &ItemObj = *ItemVal.getAsObject();
     SerializeInfo(Records[Index], ItemObj);
-    if (Index == Records.size() - 1)
-      ItemObj["End"] = true;
+    ItemObj["End"] = (Index == Records.size() - 1);
     RecordsArrayRef.push_back(ItemVal);
   }
   Obj[Key] = RecordsArray;
@@ -536,10 +535,14 @@ static void serializeInfo(const FunctionInfo &F, 
json::Object &Obj,
                           const std::optional<StringRef> RepositoryLine) {
   serializeCommonAttributes(F, Obj, RepositoryURL, RepositoryLine);
   Obj["IsStatic"] = F.IsStatic;
+  size_t ParamLen = F.Name.size() + 1;
 
   auto ReturnTypeObj = Object();
   serializeInfo(F.ReturnType, ReturnTypeObj);
   Obj["ReturnType"] = std::move(ReturnTypeObj);
+  ParamLen += F.ReturnType.Type.Name.size();
+  ParamLen += 2;
+  Obj["ParamLength"] = ParamLen;
 
   if (!F.Params.empty())
     serializeArray(F.Params, Obj, "Params", SerializeInfoLambda);
diff --git a/clang-tools-extra/clang-doc/assets/clang-doc-mustache.css 
b/clang-tools-extra/clang-doc/assets/clang-doc-mustache.css
index 19fba2f9eae76..922166d8ee258 100644
--- a/clang-tools-extra/clang-doc/assets/clang-doc-mustache.css
+++ b/clang-tools-extra/clang-doc/assets/clang-doc-mustache.css
@@ -520,3 +520,25 @@ a, a:visited, a:hover, a:active {
   overflow: hidden;
   padding: 10px;
 }
+
+
+.params-vertical {
+    display: flex;
+    flex-wrap: wrap;
+}
+
+
+.param {
+    display: block;
+    margin-right: 5px;
+    padding-left: 100px;
+}
+
+.format-text {
+    color: #800;    
+}
+
+.format-title {
+    color: #800;
+    font-weight: bold;
+}
\ No newline at end of file
diff --git a/clang-tools-extra/clang-doc/assets/function-template.mustache 
b/clang-tools-extra/clang-doc/assets/function-template.mustache
index 510219a63d379..64845bc2d89e6 100644
--- a/clang-tools-extra/clang-doc/assets/function-template.mustache
+++ b/clang-tools-extra/clang-doc/assets/function-template.mustache
@@ -10,8 +10,7 @@
         <pre><code class="language-cpp code-clang-doc">template 
&lt;{{#Parameters}}{{Param}}{{^End}}, {{/End}}{{/Parameters}}&gt;</code></pre>
         {{/Template}}
         {{! Function Prototype }}
-        <pre><code class="language-cpp code-clang-doc">{{ReturnType.QualName}} 
{{Name}}{{#Template}}{{#Specialization}}&lt;{{#Parameters}}{{Param}}{{^End}}, 
{{/End}}{{/Parameters}}&gt;{{/Specialization}}{{/Template}} 
({{#Params}}{{Type.QualName}} {{Name}}{{^End}}, 
{{/End}}{{/Params}})</code></pre>
-        {{! Function Comments }}
+        <pre><code class="nohighlight code-clang-doc"><span 
class="format-text">{{ReturnType.QualName}}</span> <span 
class="format-title">{{Name}}</span> (<span class="params-vertical" 
style="padding-left: {{ParamLength}}ch;">{{#Params}}<span class="param"><span 
class="format-text">{{Type.QualName}}</span> {{Name}}{{^End}}, 
{{/End}}</span>{{/Params}}</span><span class="params-vertical" 
style="padding-left: {{ParamLength}}ch;">)</span></code></pre>
         {{#Description}}
         <div class="doc-card">
             {{>Comments}}

>From c8194948bc7935aee91faabb651d2e91253aefa4 Mon Sep 17 00:00:00 2001
From: Samrudh Nelli <[email protected]>
Date: Mon, 16 Feb 2026 20:00:01 +0530
Subject: [PATCH 2/2] implement approach 2 that falls back to approach 3 for
 long functions

---
 clang-tools-extra/clang-doc/JSONGenerator.cpp | 24 +++++++++++++++++--
 .../clang-doc/assets/clang-doc-mustache.css   |  1 -
 .../assets/function-template.mustache         |  2 +-
 3 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/clang-tools-extra/clang-doc/JSONGenerator.cpp 
b/clang-tools-extra/clang-doc/JSONGenerator.cpp
index c3c14b9ee6f4e..ea1d26bb3d592 100644
--- a/clang-tools-extra/clang-doc/JSONGenerator.cpp
+++ b/clang-tools-extra/clang-doc/JSONGenerator.cpp
@@ -455,6 +455,24 @@ static void serializeArray(const Container &Records, 
Object &Obj,
     ItemObj["End"] = (Index == Records.size() - 1);
     RecordsArrayRef.push_back(ItemVal);
   }
+  if (Key == "Params") {
+    size_t TotalLength = 0;
+    for (const auto &Val : RecordsArrayRef) {
+      if (const auto *ItemObj = Val.getAsObject()) {
+        if (const auto *Type = ItemObj->get("Type"))
+          if(const auto *TypeObj = Type->getAsObject())
+            if(auto Name = TypeObj->getString("QualName"))
+              TotalLength += Name->size();
+        if (auto Name = ItemObj->getString("Name"))
+          TotalLength += Name->size();
+        TotalLength += 2; // For ', '
+      }
+    }
+    size_t ParamLen;
+    if(auto Length = Obj.getInteger("ParamLength"))
+      ParamLen = *Length;
+    Obj["IsLong"] = (TotalLength + ParamLen > 80);
+  }
   Obj[Key] = RecordsArray;
 }
 
@@ -473,8 +491,7 @@ static void serializeInfo(const ArrayRef<TemplateParamInfo> 
&Params,
     Object &ParamObj = *ParamObjVal.getAsObject();
 
     ParamObj["Param"] = Params[Idx].Contents;
-    if (Idx == Params.size() - 1)
-      ParamObj["End"] = true;
+    ParamObj["End"] = (Idx == Params.size() - 1);
     ParamsArrayRef.push_back(ParamObjVal);
   }
   Obj["Parameters"] = ParamsArray;
@@ -547,6 +564,9 @@ static void serializeInfo(const FunctionInfo &F, 
json::Object &Obj,
   if (!F.Params.empty())
     serializeArray(F.Params, Obj, "Params", SerializeInfoLambda);
 
+  if(ParamLen >= 40)
+    Obj["ParamLength"] = 35;
+
   if (F.Template)
     serializeInfo(F.Template.value(), Obj);
 }
diff --git a/clang-tools-extra/clang-doc/assets/clang-doc-mustache.css 
b/clang-tools-extra/clang-doc/assets/clang-doc-mustache.css
index 922166d8ee258..82f4f318ad578 100644
--- a/clang-tools-extra/clang-doc/assets/clang-doc-mustache.css
+++ b/clang-tools-extra/clang-doc/assets/clang-doc-mustache.css
@@ -531,7 +531,6 @@ a, a:visited, a:hover, a:active {
 .param {
     display: block;
     margin-right: 5px;
-    padding-left: 100px;
 }
 
 .format-text {
diff --git a/clang-tools-extra/clang-doc/assets/function-template.mustache 
b/clang-tools-extra/clang-doc/assets/function-template.mustache
index 64845bc2d89e6..fe49bb5fa421f 100644
--- a/clang-tools-extra/clang-doc/assets/function-template.mustache
+++ b/clang-tools-extra/clang-doc/assets/function-template.mustache
@@ -10,7 +10,7 @@
         <pre><code class="language-cpp code-clang-doc">template 
&lt;{{#Parameters}}{{Param}}{{^End}}, {{/End}}{{/Parameters}}&gt;</code></pre>
         {{/Template}}
         {{! Function Prototype }}
-        <pre><code class="nohighlight code-clang-doc"><span 
class="format-text">{{ReturnType.QualName}}</span> <span 
class="format-title">{{Name}}</span> (<span class="params-vertical" 
style="padding-left: {{ParamLength}}ch;">{{#Params}}<span class="param"><span 
class="format-text">{{Type.QualName}}</span> {{Name}}{{^End}}, 
{{/End}}</span>{{/Params}}</span><span class="params-vertical" 
style="padding-left: {{ParamLength}}ch;">)</span></code></pre>
+        <pre><code class="nohighlight code-clang-doc"><span 
class="format-text">{{ReturnType.QualName}}</span> <span 
class="format-title">{{Name}}</span> ({{#IsLong}}<span class="params-vertical" 
style="padding-left: {{ParamLength}}ch;">{{#Params}}<span class="param"><span 
class="format-text">{{Type.QualName}}</span> {{Name}}{{^End}}, 
{{/End}}</span>{{/Params}}</span><span class="param" style="padding-left: 
calc({{ParamLength}}ch - 
1ch);">)</span>{{/IsLong}}{{^IsLong}}{{#Params}}{{Type.QualName}} 
{{Name}}{{^End}}, {{/End}}{{/Params}}){{/IsLong}}</code></pre>
         {{#Description}}
         <div class="doc-card">
             {{>Comments}}

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