feat: implement local variable declarations and symbol table in compiler and VM

Add support for local variable declarations with `var` keyword in the Wren compiler, including a symbol table for tracking locals within blocks. Introduce new bytecode instructions (CODE_POP, CODE_LOAD_LOCAL, CODE_STORE_LOCAL) and a call frame stack in the VM to manage local variable scopes during execution. Refactor the symbol table from a flat array to a proper SymbolTable struct with init/clear/add/ensure/find functions, and add a primitive method table for the num class with an `abs` method.

This commit is contained in:

Bob Nystrom

2013-10-23 22:32:59 +00:00

parent 71c4c330ca

commit ca8f9faf18

4 changed files with 293 additions and 54 deletions

example/hello.wren

+3 -2

View File

@@ -1,2 +1,3 @@
 .ok
 .yar
 var a = 123
 var b = 345
 a