[gsb] replace dyn_cast with isa

Suyash Srijan · Suyash Srijan · commit 3c1e8fa1cbf3 · 2019-01-19T23:21:42.000Z
diff --git a/lib/AST/GenericSignatureBuilder.cpp b/lib/AST/GenericSignatureBuilder.cpp
@@ -4632,8 +4632,8 @@ ConstraintResult GenericSignatureBuilder::addTypeRequirement(
       
       bool shouldOfferFixit = false;
       if (auto GTPT = subjectType->getAs<GenericTypeParamType>()) {
-        shouldOfferFixit = dyn_cast<ExtensionDecl>(GTPT->getDecl()
-                                                       ->getDeclContext());
+        shouldOfferFixit = isa<ExtensionDecl>(GTPT->getDecl()
+                                                  ->getDeclContext());
       }
       
       if (shouldOfferFixit) {

Original file line number	Diff line number	Diff line change
`@@ -4632,8 +4632,8 @@ ConstraintResult GenericSignatureBuilder::addTypeRequirement(`
`4632`	`4632`
`4633`	`4633`	`bool shouldOfferFixit = false;`
`4634`	`4634`	`if (auto GTPT = subjectType->getAs<GenericTypeParamType>()) {`
`4635`		`- shouldOfferFixit = dyn_cast<ExtensionDecl>(GTPT->getDecl()`
`4636`		`- ->getDeclContext());`
	`4635`	`+ shouldOfferFixit = isa<ExtensionDecl>(GTPT->getDecl()`
	`4636`	`+ ->getDeclContext());`
`4637`	`4637`	`}`
`4638`	`4638`
`4639`	`4639`	`if (shouldOfferFixit) {`