Function visitArrowFunctionExpr

packages/compiler/src/output/abstract_emitter.ts:430–458

(ast: o.ArrowFunctionExpr, ctx: EmitterVisitorContext)

  }

  visitArrowFunctionExpr(ast: o.ArrowFunctionExpr, ctx: EmitterVisitorContext): void {
    this.printLeadingComments(ast, ctx);
    ctx.print(ast, '(');
    this.visitParams(ast.params, ctx);
    ctx.print(ast, ')');
    ast.type?.visitType(this, ctx);
    ctx.print(ast, ' => ');

    if (Array.isArray(ast.body)) {
      ctx.print(ast, `{`);
      ctx.println(ast);
      ctx.incIndent();
      this.visitAllStatements(ast.body, ctx);
      ctx.decIndent();
      ctx.println(ast, `}`);
    } else {
      const shouldParenthesize = this.shouldParenthesize(ast.body, ast);

      if (shouldParenthesize) {
        ctx.print(ast, '(');
      }

      ast.body.visitExpression(this, ctx);

      if (shouldParenthesize) {
        ctx.print(ast, ')');
      }
    }
  }

  visitDeclareFunctionStmt(stmt: o.DeclareFunctionStmt, ctx: EmitterVisitorContext): void {
    this.printLeadingComments(stmt, ctx);