refactor: remove separate CODE_SUBCLASS instruction, unify class creation with null sentinel

Eliminate the dedicated CODE_SUBCLASS opcode and instead push a null value to indicate implicit inheritance from Object. This simplifies the bytecode interpreter by using a single CODE_CLASS instruction that checks the top of stack for a null sentinel to determine whether to use the implicit Object superclass or a user-provided superclass. The change also consolidates argument counting and debug printing logic, removing the now-unnecessary case branches for CODE_SUBCLASS across the compiler, VM, and debug modules.

This commit is contained in:

Bob Nystrom

2014-01-27 01:25:38 +00:00

parent 4aa851cb64

commit 74b67eae67

5 changed files with 74 additions and 157 deletions

.gitignore

View File

@@ -1,5 +1,6 @@
 # Intermediate files directory.
 build/
 build_xcode/
 # Built applications.
 wren