Block the use of interpolated string when a compile-time constant is …

…required (#11692)

Fixed #11292.
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src/Bicep.Core.IntegrationTests/ScenarioTests.cs

@@ -5013,4 +5013,22 @@ public void Test_Issue10343()
         var evaluated = TemplateEvaluator.Evaluate(result.Template);
         evaluated.Should().HaveValueAtPath("resources.foo3.dependsOn", new JArray("foo2"));
     }
+
+    // https://github.com/Azure/bicep/issues/11292
+    [TestMethod]
+    public void Test_Issue11292()
+    {
+        var result = CompilationHelper.Compile(
+            Services.WithFeatureOverrides(new(SymbolicNameCodegenEnabled: true)),
+            ("main.bicep", """
+            @description('foo${'bar'}')
+            param baz int
+            """));
+
+        result.Template.Should().NotHaveValue();
+        result.ExcludingLinterDiagnostics().Should().HaveDiagnostics(new[]
+        {
+            ("BCP032", DiagnosticLevel.Error, "The value must be a compile-time constant."),
+        });
+    }
 }

src/Bicep.Core/TypeSystem/CompileTimeConstantVisitor.cs

@@ -60,6 +60,15 @@ public override void VisitPropertyAccessSyntax(PropertyAccessSyntax syntax)
             this.AppendError(syntax);
         }
 
+        public override void VisitStringSyntax(StringSyntax syntax)
+        {
+            // Flag string interpolation since we don't support constant folding and constant propagation.
+            if (syntax.IsInterpolated())
+            {
+                this.AppendError(syntax);
+            }
+        }
+
         public override void VisitTernaryOperationSyntax(TernaryOperationSyntax syntax)
         {
             this.AppendError(syntax);

src/Bicep.LangServer/Extensions/DocumentUriExtensions.cs

@@ -1,12 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
-using OmniSharp.Extensions.LanguageServer.Protocol;
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace OmniSharp.Extensions.LanguageServer.Protocol
 {