Question

It seems all scripting languages like PHP ,Perl doesn’t build any syntax tree,but interpret it directly(no separate syntax parsing & code generation):

https://svn.php.net/repository/php/php-src/trunk/Zend/zend_language_parser.y

is there any popular interpretive language that first generates the Syntax tree when parsing at all?

Answer 1

The information you have regarding Perl is incorrect:

At compile time, the interpreter parses Perl code into a syntax tree. At run time, it executes the program by walking the tree.

(Source: perl wikipedia page.)

You’ll find information about modules you can use to visualize that syntax tree in the Core modules documentation.