Function enter

packages/compiler-sfc/src/compileScript.ts:643–671

(child: Node, parent: Node | null)

      const scope: Statement[][] = [scriptSetupAst.body]
      walk(node, {
        enter(child: Node, parent: Node | null) {
          if (isFunctionType(child)) {
            this.skip()
          }
          if (child.type === 'BlockStatement') {
            scope.push(child.body)
          }
          if (child.type === 'AwaitExpression') {
            hasAwait = true
            // if the await expression is an expression statement and
            // - is in the root scope
            // - or is not the first statement in a nested block scope
            // then it needs a semicolon before the generated code.
            const currentScope = scope[scope.length - 1]
            const needsSemi = currentScope.some((n, i) => {
              return (
                (scope.length === 1 || i > 0) &&
                n.type === 'ExpressionStatement' &&
                n.start === child.start
              )
            })
            processAwait(
              ctx,
              child,
              needsSemi,
              parent!.type === 'ExpressionStatement',
            )
          }
        },
        exit(node: Node) {
          if (node.type === 'BlockStatement') scope.pop()
        },