infer from usages: support short-circuiting assignment operators (#52860)

Author: zardoy

src/services/codefixes/inferFromUsage.ts

@@ -869,6 +869,9 @@ function inferTypeFromReferences(program: Program, references: readonly Identifi
             case SyntaxKind.EqualsEqualsEqualsToken:
             case SyntaxKind.ExclamationEqualsEqualsToken:
             case SyntaxKind.ExclamationEqualsToken:
+            case SyntaxKind.AmpersandAmpersandEqualsToken:
+            case SyntaxKind.QuestionQuestionEqualsToken:
+            case SyntaxKind.BarBarEqualsToken:
                 addCandidateType(usage, checker.getTypeAtLocation(parent.left === node ? parent.right : parent.left));
                 break;
 

tests/cases/fourslash/codeFixInferFromUsageAllAssignments.ts

@@ -0,0 +1,14 @@
+/// <reference path='fourslash.ts' />
+
+// @noImplicitAny: false
+////[|let x
+////|]
+////x ??= 1
+////x ||= "2"
+////x &&= true
+
+verify.codeFix({
+    description: "Infer type of 'x' from usage",
+    index: 0,
+    newRangeContent: 'let x: string | number | boolean\n',
+})