Motiejus
9322d3feb0
Port the upstream ptrCast() function (AstGen.zig:8969-9087) which handles nested pointer cast collapsing. All five pointer cast builtins (@ptrCast, @alignCast, @addrSpaceCast, @constCast, @volatileCast) now route through a single ptrCastBuiltin() function that: - Walks inward through nested builtin calls accumulating flags - Handles @fieldParentPtr nesting (with accumulated outer flags) - Emits ptr_cast_full, ptr_cast_no_dest, or simple ptr_cast based on combined flags and whether a result type is needed This fixes compile errors in field_parent_ptr.zig and switch.zig where @alignCast(@fieldParentPtr(...)) needed nested cast support. Also adds @addrSpaceCast support (previously missing). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
About
zig0 aspires to be an interpreter of zig 0.15.2 written in C.
This is written with help from LLM:
- Lexer:
- Datastructures 100% human.
- Helper functions 100% human.
- Lexing functions 50/50 human/bot.
- Parser:
- Datastructures 100% human.
- Helper functions 50/50.
- Parser functions 5/95 human/bot.
- AstGen: TBD.
Testing
Quick test:
zig build fmt-zig0 test-zig0
Full test and static analysis with all supported compilers and valgrind (run before commit, takes a while):
zig build all-zig0 -Dvalgrind
Debugging tips
Test runs infinitely? Build the test program executable:
$ zig build test-zig0 -Dzig0-no-exec
And then run it, capturing the stack trace:
gdb -batch \
-ex "python import threading; threading.Timer(1.0, lambda: gdb.post_event(lambda: gdb.execute('interrupt'))).start()" \
-ex run \
-ex "bt full" \
-ex quit \
zig-out/bin/test
You are welcome to replace -ex "bt full" with anything other of interest.