feat: add foreign class support with allocation, construct opcodes, and CLI callback wiring

Implement the initial infrastructure for foreign classes in the Wren VM, including new opcodes (FOREIGN_CONSTRUCT, FOREIGN_CLASS), a WrenBindForeignClassFn callback type in the public API, and updated CLI vm.c to store and forward foreign binding callbacks via setForeignCallbacks(). The compiler now tracks whether a class is foreign via a new isForeign flag in ClassCompiler, emits CODE_FOREIGN_CONSTRUCT instead of CODE_CONSTRUCT for foreign class constructors, and errors on field definitions inside foreign classes. The debug dump and opcode header gain entries for the new opcodes, and wrenBindSuperclass handles the -1 numFields sentinel for foreign classes to prevent field inheritance from superclasses.

This commit is contained in:

Bob Nystrom

2015-08-15 19:07:53 +00:00

parent 7551fa8c9b

commit 2dc209e585

33 changed files with 720 additions and 119 deletions

test/language/inheritance/inherit_from_map.wren

+1 -1

View File

@@ -1 +1 @@
 class Subclass is Map {} // expect runtime error: Subclass cannot inherit from Map.
 class Subclass is Map {} // expect runtime error: Class 'Subclass' cannot inherit from built-in class 'Map'.