From e0edb49f7a8c43881462ea04eec28262129f6c3f Mon Sep 17 00:00:00 2001
From: Yilou Wang <wangyilou123@gmail.com>
Date: Fri, 20 Feb 2026 16:53:34 +0100
Subject: [PATCH] Support 'this' keyword inside inline randomize() with {}
 constraint blocks (#7102) (#7113)

---
 src/V3LinkDot.cpp                         |  3 ++
 test_regress/t/t_randomize_this_inline.py | 21 ++++++++
 test_regress/t/t_randomize_this_inline.v  | 62 +++++++++++++++++++++++
 3 files changed, 86 insertions(+)
 create mode 100755 test_regress/t/t_randomize_this_inline.py
 create mode 100644 test_regress/t/t_randomize_this_inline.v

diff --git a/src/V3LinkDot.cpp b/src/V3LinkDot.cpp
index e831c9a76..2c22bf1a2 100644
--- a/src/V3LinkDot.cpp
+++ b/src/V3LinkDot.cpp
@@ -3705,6 +3705,9 @@ class LinkDotResolveVisitor final : public VNVisitor {
 
             if (VN_IS(nodep->lhsp(), ParseRef) && nodep->lhsp()->name() == "this") {
                 VSymEnt* classSymp = getThisClassSymp();
+                // In 'randomize() with { this.member }', 'this' refers to randomized
+                // object, not the calling class (IEEE 1800-2023 18.7)
+                if (m_randSymp && m_inWith) classSymp = m_randSymp;
                 if (!classSymp) {
                     nodep->v3error("'this' used outside class (IEEE 1800-2023 8.11)");
                     m_ds.m_dotErr = true;
diff --git a/test_regress/t/t_randomize_this_inline.py b/test_regress/t/t_randomize_this_inline.py
new file mode 100755
index 000000000..db1adb3f9
--- /dev/null
+++ b/test_regress/t/t_randomize_this_inline.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of either the GNU Lesser General Public License Version 3
+# or the Perl Artistic License Version 2.0.
+# SPDX-FileCopyrightText: 2026 Wilson Snyder
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+import vltest_bootstrap
+
+test.scenarios('simulator')
+
+if not test.have_solver:
+    test.skip("No constraint solver installed")
+
+test.compile()
+
+test.execute()
+
+test.passes()
diff --git a/test_regress/t/t_randomize_this_inline.v b/test_regress/t/t_randomize_this_inline.v
new file mode 100644
index 000000000..e3e808a69
--- /dev/null
+++ b/test_regress/t/t_randomize_this_inline.v
@@ -0,0 +1,62 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed under the Creative Commons Public Domain.
+// SPDX-FileCopyrightText: 2026 PlanV GmbH
+// SPDX-License-Identifier: CC0-1.0
+
+// verilog_format: off
+`define stop $stop
+`define checkd(gotv,expv) do if ((gotv) !== (expv)) begin $write("%%Error: %s:%0d:  got=%0d exp=%0d\n", `__FILE__,`__LINE__, (gotv), (expv)); `stop; end while(0);
+`define check_range(gotv,minv,maxv) do if ((gotv) < (minv) || (gotv) > (maxv)) begin $write("%%Error: %s:%0d:  got=%0d exp=%0d-%0d\n", `__FILE__,`__LINE__, (gotv), (minv), (maxv)); `stop; end while(0);
+// verilog_format: on
+
+// Test: 'this' keyword inside inline randomize() with {} constraint blocks.
+// 'this' should refer to the object being randomized (IEEE 1800-2023 18.7).
+
+class DataItem;
+  rand bit [7:0] value;
+  rand bit [7:0] limit;
+  constraint default_con { limit inside {[8'd50:8'd200]}; }
+endclass
+
+// Test 4: 'this' in inline constraint called from another class method.
+// 'this' must bind to the randomized object, not the calling class.
+class Caller;
+  rand bit [7:0] own_value;
+  function int do_rand(DataItem item);
+    return item.randomize() with { this.value > 8'd30; this.value < 8'd40; };
+  endfunction
+endclass
+
+module t;
+  initial begin
+    automatic DataItem item = new();
+    automatic Caller caller = new();
+    automatic int rand_ok;
+
+    // Test 1: 'this.member' in inline constraint from module-level code
+    rand_ok = item.randomize() with { this.value > 8'd10; this.value < 8'd50; };
+    `checkd(rand_ok, 1)
+    `check_range(item.value, 11, 49)
+    `check_range(item.limit, 50, 200)
+
+    // Test 2: multiple 'this.member' references
+    rand_ok = item.randomize() with { this.value > 8'd20; this.value < 8'd30; };
+    `checkd(rand_ok, 1)
+    `check_range(item.value, 21, 29)
+
+    // Test 3: mix of 'this.member' and unqualified member
+    rand_ok = item.randomize() with { this.value > 8'd5; this.value < 8'd100; limit > 8'd150; };
+    `checkd(rand_ok, 1)
+    `check_range(item.value, 6, 99)
+    `check_range(item.limit, 151, 200)
+
+    // Test 4: 'this' binds to randomized object, not calling class
+    rand_ok = caller.do_rand(item);
+    `checkd(rand_ok, 1)
+    `check_range(item.value, 31, 39)
+
+    $write("*-* All Finished *-*\n");
+    $finish;
+  end
+endmodule