Motiejus Jakštys
257236be4c
Add two fixes from audit of ptrTypeExpr against upstream AstGen.zig ptrType: 1. Reject `[*c]allowzero T` with a compile error matching upstream (AstGen.zig:3840-3842). C pointers always allow address zero, so the allowzero modifier is invalid on them. 2. Save source_offset/source_line/source_column before typeExpr and restore them before evaluating each trailing expression (sentinel, addrspace, align). This ensures correct debug info source locations matching upstream (AstGen.zig:3844-3846, 3859-3861, 3876-3878, 3885-3887). Issue 3 (addrspace RL using addBuiltinValue) is skipped as addBuiltinValue is not yet implemented. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
About
zig0 aspires to be an interpreter of zig 0.15.1 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 test
Full test and static analysis with all supported compilers and valgrind (run before commit, takes a while):
zig build -Dvalgrind
Debugging tips
Test runs infinitely? Build the test program executable:
$ zig build test -Dno-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.