[estree] add Directive to Program (#40996)

types/estree/estree-tests.ts

@@ -7,6 +7,7 @@ declare var statement: ESTree.Statement;
 declare var emptyStatement: ESTree.EmptyStatement;
 declare var blockStatement: ESTree.BlockStatement;
 declare var expressionStatement: ESTree.ExpressionStatement;
+declare var directive: ESTree.Directive;
 declare var ifStatement: ESTree.IfStatement;
 declare var labeledStatement: ESTree.LabeledStatement;
 declare var breakStatement: ESTree.BreakStatement;
@@ -120,6 +121,11 @@ statement = blockStatement.body[0];
 var expressionStatement: ESTree.ExpressionStatement;
 expression = expressionStatement.expression;
 
+// Directive
+literal = directive.expression;
+// $ExpectType string
+directive.directive;
+
 // IfStatement
 var ifStatement: ESTree.IfStatement;
 expression = ifStatement.test;

types/estree/index.d.ts

@@ -62,10 +62,16 @@ export interface Position {
 export interface Program extends BaseNode {
   type: "Program";
   sourceType: "script" | "module";
-  body: Array<Statement | ModuleDeclaration>;
+  body: Array<Directive | Statement | ModuleDeclaration>;
   comments?: Array<Comment>;
 }
 
+export interface Directive extends BaseNode {
+  type: "ExpressionStatement";
+  expression: Literal;
+  directive: string;
+}
+
 interface BaseFunction extends BaseNode {
   params: Array<Pattern>;
   generator?: boolean;