Use self hosted translate-c for cImport #4025
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- fix use of undefined value - fix parenexprclass result not being suppressed - add an error and a TODO for access of an anonymous field
…xu-stage-2-cimport
According to C11 6.5.6.8, pointer arithmetic may not overflow. In fact, it may not even go more than 1 past the end of an object, or UB occurs. This is the same as Zig pointer arithmetic semantics, and so the `+` and `+=` operators rather than `+%` and `+%=` are appropriate for C-translated pointer arithmetic.
Block-local identifiers have block-local mangling numbers, and more consistent mangling is applied within blocks. Parameters, for example, are treated the same as other block-local variables, and are not mangled unless they conflict with another name in scope.
* `std.mem.Compare` is now `std.math.Order` and the enum tags renamed to follow new style convention. * `std.mem.compare` is renamed to `std.mem.order`. * new function `std.math.order`
Widening and truncating integer casting to different signedness works better now. For example `(unsigned long)-1` is now translated to zig code that compiles correctly.
This made macros which had an error being processed emit multiple times, causing the self-hosted compiler to fail to build.
This input file, for example, would produce duplicate identifiers in the translated Zig code: ``` #define bar err( #define bar err( ```
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This is @Vexu's #3973, merged into a branch, with more commits.
Checklist:
-1type coerced tounsigned longstatic inline)