refactor heapview

src/prolog/ast.rs

@@ -15,12 +15,12 @@ use std::rc::Rc;
 use std::str::Utf8Error;
 use std::vec::Vec;
 
+pub const LEXER_BUF_SIZE: usize = 4096;
+
 pub type Atom = String;
 
 pub type Var = String;
 
-pub const LEXER_BUF_SIZE: usize = 4096;
-
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord)]
 pub enum GenContext {
     Head, Mid(usize), Last(usize) // Mid & Last: chunk_num