Merge pull request #1416 from SimonCropp/use-some-pattern-matching

baywet · web-flow · commit a4ffde3f1a7f · 2023-10-24T15:24:17.000-04:00
use some pattern matching
diff --git a/src/Microsoft.OpenApi.Hidi/OpenApiSpecVersionHelper.cs b/src/Microsoft.OpenApi.Hidi/OpenApiSpecVersionHelper.cs
@@ -18,7 +18,7 @@ public static OpenApiSpecVersion TryParseOpenApiSpecVersion(string value)
 
             if (int.TryParse(res, out var result))
             {
-                if (result >= 2 && result < 3)
+                if (result is >= 2 and < 3)
                 {
                     return OpenApiSpecVersion.OpenApi2_0;
                 }
diff --git a/src/Microsoft.OpenApi.Readers/Services/OpenApiRemoteReferenceCollector.cs b/src/Microsoft.OpenApi.Readers/Services/OpenApiRemoteReferenceCollector.cs
@@ -39,15 +39,10 @@ public override void Visit(IOpenApiReferenceable referenceable)
         /// </summary>
         private void AddReference(OpenApiReference reference)
         {
-            if (reference != null)
+            if (reference is {IsExternal: true} &&
+                !_references.ContainsKey(reference.ExternalResource))
             {
-                if (reference.IsExternal)
-                {
-                    if (!_references.ContainsKey(reference.ExternalResource))
-                    {
-                        _references.Add(reference.ExternalResource, reference);
-                    }
-                }
+                _references.Add(reference.ExternalResource, reference);
             }
         }
     }
diff --git a/src/Microsoft.OpenApi.Readers/V2/OpenApiParameterDeserializer.cs b/src/Microsoft.OpenApi.Readers/V2/OpenApiParameterDeserializer.cs
@@ -128,7 +128,7 @@ internal static partial class OpenApiV2Deserializer
                     new(
                         p => p.Schema?.Enum,
                         (p, v) => {
-                            if (p.Schema != null || v != null && v.Count > 0)
+                            if (p.Schema != null || v is {Count: > 0})
                             {
                                 GetOrCreateSchema(p).Enum = v;
                             }
diff --git a/src/Microsoft.OpenApi/Models/OpenApiComponents.cs b/src/Microsoft.OpenApi/Models/OpenApiComponents.cs
@@ -126,8 +126,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                 Schemas,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.Schema &&
+                    if (component.Reference is {Type: ReferenceType.Schema} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV3WithoutReference(w);
@@ -144,8 +143,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                 Responses,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.Response &&
+                    if (component.Reference is {Type: ReferenceType.Response} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV3WithoutReference(w);
@@ -162,8 +160,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                 Parameters,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.Parameter &&
+                    if (component.Reference is {Type: ReferenceType.Parameter} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV3WithoutReference(w);
@@ -180,8 +177,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                 Examples,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.Example &&
+                    if (component.Reference is {Type: ReferenceType.Example} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV3WithoutReference(w);
@@ -198,8 +194,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                 RequestBodies,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.RequestBody &&
+                    if (component.Reference is {Type: ReferenceType.RequestBody} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV3WithoutReference(w);
@@ -216,8 +211,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                 Headers,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.Header &&
+                    if (component.Reference is {Type: ReferenceType.Header} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV3WithoutReference(w);
@@ -234,8 +228,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                 SecuritySchemes,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.SecurityScheme &&
+                    if (component.Reference is {Type: ReferenceType.SecurityScheme} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV3WithoutReference(w);
@@ -252,8 +245,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                 Links,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.Link &&
+                    if (component.Reference is {Type: ReferenceType.Link} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV3WithoutReference(w);
@@ -270,8 +262,7 @@ public void SerializeAsV3(IOpenApiWriter writer)
                 Callbacks,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.Callback &&
+                    if (component.Reference is {Type: ReferenceType.Callback} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV3WithoutReference(w);
diff --git a/src/Microsoft.OpenApi/Models/OpenApiDocument.cs b/src/Microsoft.OpenApi/Models/OpenApiDocument.cs
@@ -186,8 +186,7 @@ public void SerializeAsV2(IOpenApiWriter writer)
                     Components?.Schemas,
                     (w, key, component) =>
                     {
-                        if (component.Reference != null &&
-                            component.Reference.Type == ReferenceType.Schema &&
+                        if (component.Reference is {Type: ReferenceType.Schema} &&
                             component.Reference.Id == key)
                         {
                             component.SerializeAsV2WithoutReference(w);
@@ -215,8 +214,7 @@ public void SerializeAsV2(IOpenApiWriter writer)
                 parameters,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.Parameter &&
+                    if (component.Reference is {Type: ReferenceType.Parameter} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV2WithoutReference(w);
@@ -233,8 +231,7 @@ public void SerializeAsV2(IOpenApiWriter writer)
                 Components?.Responses,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.Response &&
+                    if (component.Reference is {Type: ReferenceType.Response} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV2WithoutReference(w);
@@ -251,8 +248,7 @@ public void SerializeAsV2(IOpenApiWriter writer)
                 Components?.SecuritySchemes,
                 (w, key, component) =>
                 {
-                    if (component.Reference != null &&
-                        component.Reference.Type == ReferenceType.SecurityScheme &&
+                    if (component.Reference is {Type: ReferenceType.SecurityScheme} &&
                         component.Reference.Id == key)
                     {
                         component.SerializeAsV2WithoutReference(w);
diff --git a/src/Microsoft.OpenApi/Models/OpenApiOperation.cs b/src/Microsoft.OpenApi/Models/OpenApiOperation.cs
@@ -274,7 +274,7 @@ public void SerializeAsV2(IOpenApiWriter writer)
                     .SelectMany(static r => r.Value.Content?.Keys)
                     .Concat(
                         Responses
-                        .Where(static r => r.Value.Reference != null && r.Value.Reference.HostDocument != null)
+                        .Where(static r => r.Value.Reference is {HostDocument: not null})
                         .SelectMany(static r => r.Value.GetEffective(r.Value.Reference.HostDocument)?.Content?.Keys))
                     .Distinct()
                     .ToList();
diff --git a/src/Microsoft.OpenApi/Models/OpenApiParameter.cs b/src/Microsoft.OpenApi/Models/OpenApiParameter.cs
@@ -246,7 +246,7 @@ public void SerializeAsV3WithoutReference(IOpenApiWriter writer)
             }
 
             // explode
-            writer.WriteProperty(OpenApiConstants.Explode, _explode, _style.HasValue && _style.Value == ParameterStyle.Form);
+            writer.WriteProperty(OpenApiConstants.Explode, _explode, _style is ParameterStyle.Form);
 
             // allowReserved
             writer.WriteProperty(OpenApiConstants.AllowReserved, AllowReserved, false);
diff --git a/src/Microsoft.OpenApi/Services/OpenApiReferenceResolver.cs b/src/Microsoft.OpenApi/Services/OpenApiReferenceResolver.cs
@@ -300,7 +300,7 @@ private void ResolveTags(IList<OpenApiTag> tags)
 
         private bool IsUnresolvedReference(IOpenApiReferenceable possibleReference)
         {
-            return (possibleReference != null && possibleReference.UnresolvedReference);
+            return possibleReference is {UnresolvedReference: true};
         }
     }
 }
diff --git a/src/Microsoft.OpenApi/Validations/OpenApiValidator.cs b/src/Microsoft.OpenApi/Validations/OpenApiValidator.cs
@@ -292,7 +292,7 @@ private void Validate(object item, Type type)
             }
 
             // Validate unresolved references as references
-            if (item is IOpenApiReferenceable potentialReference && potentialReference.UnresolvedReference)
+            if (item is IOpenApiReferenceable {UnresolvedReference: true})
             {
                 type = typeof(IOpenApiReferenceable);
             }
diff --git a/src/Microsoft.OpenApi/Validations/Rules/OpenApiContactRules.cs b/src/Microsoft.OpenApi/Validations/Rules/OpenApiContactRules.cs
@@ -21,7 +21,7 @@ public static class OpenApiContactRules
                 (context, item) =>
                 {
                     context.Enter("email");
-                    if (item != null && item.Email != null)
+                    if (item is {Email: not null})
                     {
                         if (!item.Email.IsEmailAddress())
                         {
diff --git a/src/Microsoft.OpenApi/Writers/OpenApiJsonWriter.cs b/src/Microsoft.OpenApi/Writers/OpenApiJsonWriter.cs
@@ -59,7 +59,7 @@ public override void WriteStartObject()
 
             var currentScope = StartScope(ScopeType.Object);
 
-            if (previousScope != null && previousScope.Type == ScopeType.Array)
+            if (previousScope is {Type: ScopeType.Array})
             {
                 currentScope.IsInArray = true;
 
@@ -110,7 +110,7 @@ public override void WriteStartArray()
 
             var currentScope = StartScope(ScopeType.Array);
 
-            if (previousScope != null && previousScope.Type == ScopeType.Array)
+            if (previousScope is {Type: ScopeType.Array})
             {
                 currentScope.IsInArray = true;
 
diff --git a/src/Microsoft.OpenApi/Writers/OpenApiYamlWriter.cs b/src/Microsoft.OpenApi/Writers/OpenApiYamlWriter.cs
@@ -48,7 +48,7 @@ public override void WriteStartObject()
 
             var currentScope = StartScope(ScopeType.Object);
 
-            if (previousScope != null && previousScope.Type == ScopeType.Array)
+            if (previousScope is {Type: ScopeType.Array})
             {
                 currentScope.IsInArray = true;
 
@@ -76,7 +76,7 @@ public override void WriteEndObject()
             if (previousScope.ObjectCount == 0)
             {
                 // If we are in an object, write a white space preceding the braces.
-                if (currentScope != null && currentScope.Type == ScopeType.Object)
+                if (currentScope is {Type: ScopeType.Object})
                 {
                     Writer.Write(" ");
                 }
@@ -94,7 +94,7 @@ public override void WriteStartArray()
 
             var currentScope = StartScope(ScopeType.Array);
 
-            if (previousScope != null && previousScope.Type == ScopeType.Array)
+            if (previousScope is {Type: ScopeType.Array})
             {
                 currentScope.IsInArray = true;
 
@@ -122,7 +122,7 @@ public override void WriteEndArray()
             if (previousScope.ObjectCount == 0)
             {
                 // If we are in an object, write a white space preceding the braces.
-                if (currentScope != null && currentScope.Type == ScopeType.Object)
+                if (currentScope is {Type: ScopeType.Object})
                 {
                     Writer.Write(" ");
                 }

Original file line number	Diff line number	Diff line change
`@@ -18,7 +18,7 @@ public static OpenApiSpecVersion TryParseOpenApiSpecVersion(string value)`
`18`	`18`
`19`	`19`	`if (int.TryParse(res, out var result))`
`20`	`20`	`{`
`21`		`- if (result >= 2 && result < 3)`
	`21`	`+ if (result is >= 2 and < 3)`
`22`	`22`	`{`
`23`	`23`	`return OpenApiSpecVersion.OpenApi2_0;`
`24`	`24`	`}`
Original file line number	Diff line number	Diff line change
`@@ -39,15 +39,10 @@ public override void Visit(IOpenApiReferenceable referenceable)`
`39`	`39`	`/// </summary>`
`40`	`40`	`private void AddReference(OpenApiReference reference)`
`41`	`41`	`{`
`42`		`- if (reference != null)`
	`42`	`+ if (reference is {IsExternal: true} &&`
	`43`	`+ !_references.ContainsKey(reference.ExternalResource))`
`43`	`44`	`{`
`44`		`- if (reference.IsExternal)`
`45`		`- {`
`46`		`- if (!_references.ContainsKey(reference.ExternalResource))`
`47`		`- {`
`48`		`- _references.Add(reference.ExternalResource, reference);`
`49`		`- }`
`50`		`- }`
	`45`	`+ _references.Add(reference.ExternalResource, reference);`
`51`	`46`	`}`
`52`	`47`	`}`
`53`	`48`	`}`
Original file line number	Diff line number	Diff line change
`@@ -128,7 +128,7 @@ internal static partial class OpenApiV2Deserializer`
`128`	`128`	`new(`
`129`	`129`	`p => p.Schema?.Enum,`
`130`	`130`	`(p, v) => {`
`131`		`- if (p.Schema != null \|\| v != null && v.Count > 0)`
	`131`	`+ if (p.Schema != null \|\| v is {Count: > 0})`
`132`	`132`	`{`
`133`	`133`	`GetOrCreateSchema(p).Enum = v;`
`134`	`134`	`}`
Original file line number	Diff line number	Diff line change
`@@ -126,8 +126,7 @@ public void SerializeAsV3(IOpenApiWriter writer)`
`126`	`126`	`Schemas,`
`127`	`127`	`(w, key, component) =>`
`128`	`128`	`{`
`129`		`- if (component.Reference != null &&`
`130`		`- component.Reference.Type == ReferenceType.Schema &&`
	`129`	`+ if (component.Reference is {Type: ReferenceType.Schema} &&`
`131`	`130`	`component.Reference.Id == key)`
`132`	`131`	`{`
`133`	`132`	`component.SerializeAsV3WithoutReference(w);`
`@@ -144,8 +143,7 @@ public void SerializeAsV3(IOpenApiWriter writer)`
`144`	`143`	`Responses,`
`145`	`144`	`(w, key, component) =>`
`146`	`145`	`{`
`147`		`- if (component.Reference != null &&`
`148`		`- component.Reference.Type == ReferenceType.Response &&`
	`146`	`+ if (component.Reference is {Type: ReferenceType.Response} &&`
`149`	`147`	`component.Reference.Id == key)`
`150`	`148`	`{`
`151`	`149`	`component.SerializeAsV3WithoutReference(w);`
`@@ -162,8 +160,7 @@ public void SerializeAsV3(IOpenApiWriter writer)`
`162`	`160`	`Parameters,`
`163`	`161`	`(w, key, component) =>`
`164`	`162`	`{`
`165`		`- if (component.Reference != null &&`
`166`		`- component.Reference.Type == ReferenceType.Parameter &&`
	`163`	`+ if (component.Reference is {Type: ReferenceType.Parameter} &&`
`167`	`164`	`component.Reference.Id == key)`
`168`	`165`	`{`
`169`	`166`	`component.SerializeAsV3WithoutReference(w);`
`@@ -180,8 +177,7 @@ public void SerializeAsV3(IOpenApiWriter writer)`
`180`	`177`	`Examples,`
`181`	`178`	`(w, key, component) =>`
`182`	`179`	`{`
`183`		`- if (component.Reference != null &&`
`184`		`- component.Reference.Type == ReferenceType.Example &&`
	`180`	`+ if (component.Reference is {Type: ReferenceType.Example} &&`
`185`	`181`	`component.Reference.Id == key)`
`186`	`182`	`{`
`187`	`183`	`component.SerializeAsV3WithoutReference(w);`
`@@ -198,8 +194,7 @@ public void SerializeAsV3(IOpenApiWriter writer)`
`198`	`194`	`RequestBodies,`
`199`	`195`	`(w, key, component) =>`
`200`	`196`	`{`
`201`		`- if (component.Reference != null &&`
`202`		`- component.Reference.Type == ReferenceType.RequestBody &&`
	`197`	`+ if (component.Reference is {Type: ReferenceType.RequestBody} &&`
`203`	`198`	`component.Reference.Id == key)`
`204`	`199`	`{`
`205`	`200`	`component.SerializeAsV3WithoutReference(w);`
`@@ -216,8 +211,7 @@ public void SerializeAsV3(IOpenApiWriter writer)`
`216`	`211`	`Headers,`
`217`	`212`	`(w, key, component) =>`
`218`	`213`	`{`
`219`		`- if (component.Reference != null &&`
`220`		`- component.Reference.Type == ReferenceType.Header &&`
	`214`	`+ if (component.Reference is {Type: ReferenceType.Header} &&`
`221`	`215`	`component.Reference.Id == key)`
`222`	`216`	`{`
`223`	`217`	`component.SerializeAsV3WithoutReference(w);`
`@@ -234,8 +228,7 @@ public void SerializeAsV3(IOpenApiWriter writer)`
`234`	`228`	`SecuritySchemes,`
`235`	`229`	`(w, key, component) =>`
`236`	`230`	`{`
`237`		`- if (component.Reference != null &&`
`238`		`- component.Reference.Type == ReferenceType.SecurityScheme &&`
	`231`	`+ if (component.Reference is {Type: ReferenceType.SecurityScheme} &&`
`239`	`232`	`component.Reference.Id == key)`
`240`	`233`	`{`
`241`	`234`	`component.SerializeAsV3WithoutReference(w);`
`@@ -252,8 +245,7 @@ public void SerializeAsV3(IOpenApiWriter writer)`
`252`	`245`	`Links,`
`253`	`246`	`(w, key, component) =>`
`254`	`247`	`{`
`255`		`- if (component.Reference != null &&`
`256`		`- component.Reference.Type == ReferenceType.Link &&`
	`248`	`+ if (component.Reference is {Type: ReferenceType.Link} &&`
`257`	`249`	`component.Reference.Id == key)`
`258`	`250`	`{`
`259`	`251`	`component.SerializeAsV3WithoutReference(w);`
`@@ -270,8 +262,7 @@ public void SerializeAsV3(IOpenApiWriter writer)`
`270`	`262`	`Callbacks,`
`271`	`263`	`(w, key, component) =>`
`272`	`264`	`{`
`273`		`- if (component.Reference != null &&`
`274`		`- component.Reference.Type == ReferenceType.Callback &&`
	`265`	`+ if (component.Reference is {Type: ReferenceType.Callback} &&`
`275`	`266`	`component.Reference.Id == key)`
`276`	`267`	`{`
`277`	`268`	`component.SerializeAsV3WithoutReference(w);`
Original file line number	Diff line number	Diff line change
`@@ -186,8 +186,7 @@ public void SerializeAsV2(IOpenApiWriter writer)`
`186`	`186`	`Components?.Schemas,`
`187`	`187`	`(w, key, component) =>`
`188`	`188`	`{`
`189`		`- if (component.Reference != null &&`
`190`		`- component.Reference.Type == ReferenceType.Schema &&`
	`189`	`+ if (component.Reference is {Type: ReferenceType.Schema} &&`
`191`	`190`	`component.Reference.Id == key)`
`192`	`191`	`{`
`193`	`192`	`component.SerializeAsV2WithoutReference(w);`
`@@ -215,8 +214,7 @@ public void SerializeAsV2(IOpenApiWriter writer)`
`215`	`214`	`parameters,`
`216`	`215`	`(w, key, component) =>`
`217`	`216`	`{`
`218`		`- if (component.Reference != null &&`
`219`		`- component.Reference.Type == ReferenceType.Parameter &&`
	`217`	`+ if (component.Reference is {Type: ReferenceType.Parameter} &&`
`220`	`218`	`component.Reference.Id == key)`
`221`	`219`	`{`
`222`	`220`	`component.SerializeAsV2WithoutReference(w);`
`@@ -233,8 +231,7 @@ public void SerializeAsV2(IOpenApiWriter writer)`
`233`	`231`	`Components?.Responses,`
`234`	`232`	`(w, key, component) =>`
`235`	`233`	`{`
`236`		`- if (component.Reference != null &&`
`237`		`- component.Reference.Type == ReferenceType.Response &&`
	`234`	`+ if (component.Reference is {Type: ReferenceType.Response} &&`
`238`	`235`	`component.Reference.Id == key)`
`239`	`236`	`{`
`240`	`237`	`component.SerializeAsV2WithoutReference(w);`
`@@ -251,8 +248,7 @@ public void SerializeAsV2(IOpenApiWriter writer)`
`251`	`248`	`Components?.SecuritySchemes,`
`252`	`249`	`(w, key, component) =>`
`253`	`250`	`{`
`254`		`- if (component.Reference != null &&`
`255`		`- component.Reference.Type == ReferenceType.SecurityScheme &&`
	`251`	`+ if (component.Reference is {Type: ReferenceType.SecurityScheme} &&`
`256`	`252`	`component.Reference.Id == key)`
`257`	`253`	`{`
`258`	`254`	`component.SerializeAsV2WithoutReference(w);`
Original file line number	Diff line number	Diff line change
`@@ -246,7 +246,7 @@ public void SerializeAsV3WithoutReference(IOpenApiWriter writer)`
`246`	`246`	`}`
`247`	`247`
`248`	`248`	`// explode`
`249`		`- writer.WriteProperty(OpenApiConstants.Explode, _explode, _style.HasValue && _style.Value == ParameterStyle.Form);`
	`249`	`+ writer.WriteProperty(OpenApiConstants.Explode, _explode, _style is ParameterStyle.Form);`
`250`	`250`
`251`	`251`	`// allowReserved`
`252`	`252`	`writer.WriteProperty(OpenApiConstants.AllowReserved, AllowReserved, false);`
Original file line number	Diff line number	Diff line change
`@@ -300,7 +300,7 @@ private void ResolveTags(IList<OpenApiTag> tags)`
`300`	`300`
`301`	`301`	`private bool IsUnresolvedReference(IOpenApiReferenceable possibleReference)`
`302`	`302`	`{`
`303`		`- return (possibleReference != null && possibleReference.UnresolvedReference);`
	`303`	`+ return possibleReference is {UnresolvedReference: true};`
`304`	`304`	`}`
`305`	`305`	`}`
`306`	`306`	`}`
Original file line number	Diff line number	Diff line change
`@@ -292,7 +292,7 @@ private void Validate(object item, Type type)`
`292`	`292`	`}`
`293`	`293`
`294`	`294`	`// Validate unresolved references as references`
`295`		`- if (item is IOpenApiReferenceable potentialReference && potentialReference.UnresolvedReference)`
	`295`	`+ if (item is IOpenApiReferenceable {UnresolvedReference: true})`
`296`	`296`	`{`
`297`	`297`	`type = typeof(IOpenApiReferenceable);`
`298`	`298`	`}`
Original file line number	Diff line number	Diff line change
`@@ -21,7 +21,7 @@ public static class OpenApiContactRules`
`21`	`21`	`(context, item) =>`
`22`	`22`	`{`
`23`	`23`	`context.Enter("email");`
`24`		`- if (item != null && item.Email != null)`
	`24`	`+ if (item is {Email: not null})`
`25`	`25`	`{`
`26`	`26`	`if (!item.Email.IsEmailAddress())`
`27`	`27`	`{`