This commit makes it possible to combine self-hosted with a pre-compiled
C object file, e.g.:
```
zig-out/bin/zig build-exe hello.zig add.o
```
where `add.o` is a pre-compiled C object file.
Also:
* improve the "ambiguous reference" error by swapping the order of
"declared here" and "also declared here" notes.
* improve the "not accessible from inner function" error:
- point out that it has to do with the thing being mutable
- eliminate the incorrect association with it being a function
- note where it crosses a namespace boundary
* struct field types are evaluated in a context that has the struct
namespace visible. Likewise with align expressions, linksection
expressions, enum tag values, and union/enum tag argument
expressions.
Closes#9194Closes#9622
* stage2 AstGen: add missing compile error for declaring a local
that shadows a primitive. Even with `@""` syntax, it may not have
the same name as a primitive.
* stage2 AstGen: add a compile error for a global declaration
whose name matches a primitive. However it is allowed when using
`@""` syntax.
* stage1: delete all "declaration shadows primitive" compile errors
because they are now handled by stage2 AstGen.
* stage1/stage2 AstGen: notice when using `@""` syntax and:
- treat `_` as a regular identifier
- skip checking if an identifire is a primitive
Check the new test cases for clarifications on semantics.
closes#6062
This way, we will conform to the standard practice of setting the
offset within the section header to the beginning of the file and
we will be able to track the location of the section in the file
for incremental updates.
* rework `build_options` to integrate with the FileSource abstraction
* support mapping as an arbitrarily named package
* support mapping to multiple different artifacts
* use hash of contents for options filename
Locals are not allowed to shadow declarations, but declarations are
allowed to shadow each other, as long as there are no ambiguous
references.
closes#678
Previous commit shifted everything down in the start.zig file, and
unfortunately our stage2 test harness depends on absolute line
numbers for a couple tests.
We already have a LICENSE file that covers the Zig Standard Library. We
no longer need to remind everyone that the license is MIT in every single
file.
Previously this was introduced to clarify the situation for a fork of
Zig that made Zig's LICENSE file harder to find, and replaced it with
their own license that required annual payments to their company.
However that fork now appears to be dead. So there is no need to
reinforce the copyright notice in every single file.
Instead of referencing stub indices since these can now be obtained
in a more generic fashion from the actual linked-list of atoms in
the __stub_helper section.
This is a simple structure containing an array and a length, that can be viewed as a slice.
It is useful to pass-by-copy small data whose exact size is known at runtime, but whose maximum size is known at comptime. This greatly simplifies code that otherwise would require an allocator, or reimplementing what this type does.
The primary purpose of this change is to eliminate one usage of
`usingnamespace` in the standard library - specifically the usage for
errno values in `std.os.linux`.
This is accomplished by truncating the `E` prefix from error values, and
making errno a proper enum.
A similar strategy can be used to eliminate some other `usingnamespace`
sites in the std lib.
This is a backwards-compatible language change.
Previously, `@intToEnum` coerced its integer operand to the integer tag
type of the destination enum type, often requiring the callsite to
additionally wrap the operand in an `@intCast`. Now, the `@intCast` is
implicit, and any integer operand can be passed to `@intToEnum`.
The same as before, it is illegal behavior to pass any integer which does
not have a corresponding enum tag.
With this routine, we are now able to freely shift stub_helper
section in memory and in file since the VM addressing is now dynamically
dependent on the positioning of `__stub_helper` preamble and other
sections generated by the linker.
