[ISSUE] Add #20

Author: LeeKaiXuan

issue/20/Makefile

@@ -0,0 +1,7 @@
+include ${PSS_HOME}/issue/Make.vars
+
+gentarget:
+	$(PSSGEN) test.pss -o test.s -root pss_top::root_a || true
+
+clean:
+	rm -f test.s result.log

issue/20/test.pss

@@ -0,0 +1,35 @@
+/*!
+@weakgroup      issue
+@{
+@file
+@author         Luther Lee
+@data           2024/06/13
+@brief          Test issue 20.
+
+
+---------------------------------------------------------------------------------------------------
+
+### Test Command
+@code{.unparsed}
+make
+@endcode
+
+@cond
+*/
+component pss_top {
+    action root_a {
+        activity {
+            do constraintBySet with { value in [1]; };
+        }
+    }
+
+    action constraintBySet {
+        rand int value;
+        set<int> foo = {1, 3, 5, 7};
+
+        constraint { value in foo; }
+        exec body ASM = """constraintBySet: {{value}}""";
+    }
+}
+
+/**@}*/

issue/20/test.s.golden

@@ -0,0 +1 @@
+constraintBySet: 1