Move target type calculation inside if

Maria Solano · Maria Solano · commit b267256554ee · 2023-04-07T14:48:45.000-07:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -22627,8 +22627,8 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
             }
             let i = 0;
             for (const type of target.types) {
-                const targetType = getTypeOfPropertyOfType(type, propertyName);
                 if (discriminable[i] === undefined) {
+                    const targetType = getTypeOfPropertyOfType(type, propertyName);
                     discriminable[i] = !!(targetType && related(getDiscriminatingType(), targetType));
                 }
                 i++;

Original file line number	Diff line number	Diff line change
`@@ -22627,8 +22627,8 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {`
`22627`	`22627`	`}`
`22628`	`22628`	`let i = 0;`
`22629`	`22629`	`for (const type of target.types) {`
`22630`		`- const targetType = getTypeOfPropertyOfType(type, propertyName);`
`22631`	`22630`	`if (discriminable[i] === undefined) {`
	`22631`	`+ const targetType = getTypeOfPropertyOfType(type, propertyName);`
`22632`	`22632`	`discriminable[i] = !!(targetType && related(getDiscriminatingType(), targetType));`
`22633`	`22633`	`}`
`22634`	`22634`	`i++;`