* Create Vector language documentation
Main changes to docs:
1. Create brief documentation on Zig vector types with code example
2. Get rid of the SIMD sub-heading under the main Vectors heading,
and update links accordingly
3. Add an example to the `@shuffle` docs
`getExternalExecutor` is moved from `std.zig.CrossTarget` to
`std.zig.system.NativeTargetInfo.getExternalExecutor`.
The function also now communicates a bit more information about *why*
the host is unable to execute a binary. The CLI is updated to report
this information in a useful manner.
`getExternalExecutor` is also improved to detect such patterns as:
* x86_64 is able to execute x86 binaries
* aarch64 is able to execute arm binaries
* etc.
Added qemu-hexagon support to `getExternalExecutor`.
`std.Target.canExecBinaries` of is removed; callers should use the more
powerful `getExternalExecutor` instead.
Now that `zig test` tries to run the resulting binary no matter what,
this commit has a follow-up change to the build system and docgen to
utilize the `getExternalExecutor` function and pass `--test-no-exec`
in some cases to avoid getting the error.
Additionally:
* refactor: extract NativePaths and NativeTargetInfo into their own
files named after the structs.
* small improvement to langref to reduce the complexity of the `callconv`
expression in a couple examples.
Updates the Language Reference sections: Comments, Values, and Zig Test.
Zig Test section moved down with the goal "make sure it can be read top to
bottom sensibly" in mind (issue #1524).
Comments and Values section examples changed test declarations to a main
function and expect statement to print statements.
A print statement was added to the "String Literals and Unicode Code Point"
section's example to demonstrate the "u" format specifier.
Zig Test Section:
* Addresses the question: "How does the syntax work?".
* Partially answers the question: "What can I do with the zig test tool?" but
should be sufficient to understand the examples in all of this document.
* Addresses the question: "How does a top-level test block differ from a function definition?"
* Provides a example to run multiple test.
Lacks clear definitions of containers, top-level, order independence, lazy
analysis, resolve, reference.
GitHub Issues: #8221, #8234
* Remove the builtins `@addWithSaturation`, `@subWithSaturation`,
`@mulWithSaturation`, and `@shlWithSaturation` now that we have
first-class syntax for saturating arithmetic.
* langref: Clarify the behavior of `@shlExact`.
* Ast: rename `bit_shift_left` to `shl` and `bit_shift_right` to `shr`
for consistency.
* Air: rename to include underscore separator with consistency with
the rest of the ops.
* Air: add shl_exact instruction
* Use non-extended tags for saturating arithmetic, to keep it
simple so that all the arithmetic operations can be done the same
way.
- Sema: unify analyzeArithmetic with analyzeSatArithmetic
- implement comptime `+|`, `-|`, and `*|`
- allow float operands to saturating arithmetic
* `<<|` allows any integer type for the RHS.
* C backend: fix rebase conflicts
* LLVM backend: reduce the amount of branching for arithmetic ops
* zig.h: fix magic number not matching actual size of C integer types
docgen HTML escapes characters inside of `syntax_block`s. This commit replaces the escaped
greater than with the `>` character. No other occurrences were found.
Fixes#9840
In a previous commit (f4d3d29), syntax checking for code blocks with the
`syntax` type was disabled due to a change in astgen now checking the existence of
identifiers. The change in astgen caused some code samples in the language
reference to cause compilation errors.
This commit updates the code samples in the language reference and
re-enables syntax checking. Some code samples have been changed to unchecked
syntax blocks using `{#syntax_block#}` when suitable.
This edit allows the reader to understand the syntax this section is talking about more quickly – they don’t have to read the whole code block and understand which part of it demonstrates the feature being described.
Affects https://ziglang.org/documentation/master/#Inferred-Error-Sets
* langref: add some more "see also" links for atomics
* Add the following AIR instructions
- atomic_load
- atomic_store_unordered
- atomic_store_monotonic
- atomic_store_release
- atomic_store_seq_cst
- atomic_rmw
* Implement those AIR instructions in LLVM and C backends.
* AstGen: make the `ty` result locations for `@atomicRmw`, `@atomicLoad`,
and `@atomicStore` be `coerced_ty` to avoid unnecessary ZIR
instructions when Sema will be doing the coercions redundantly.
* Sema for `@atomicLoad` and `@atomicRmw` is done, however Sema for
`@atomicStore` is not yet implemented.
- comptime eval for `@atomicRmw` is not yet implemented.
* Sema: flesh out `coerceInMemoryAllowed` a little bit more. It can now
handle pointers.
The language reference's HTML has been updated to be more semantically correct.
This also helps to improve the document's accessibility concerns.
* Document structure has single h1, other header sections start at h2, nav sections w/ aria labels, main section
* Zig's homepage is linked, Zig Standard Library section link to it
* Tables have caption and scoping rows and columns
* Code blocks are figures with figure captions citing source files
* Change line height 1.5 to include table of contents as well
* Luminosity contrast ratios have been adjusted to 7:1
* Dark mode colors adjusted to reduce eye strain
* Links have default browser underline with hover and focus effects
* Asides, definition lists, keyboard inputs, program outputs are represented semantically
Tools used to check:
WAVE plugin https://wave.webaim.org/
Firefox Accessibility Developer Tool
Lighthouse Accessibility Tool
- adds 1 simple behavior tests for each
which does integer and vector ops at
runtime and comptime
- adds bigint_*_sat() methods for each
- use CreateIntrinsic() which accepts a
variable number of arguments to pass
the scale parameter
* update langref
- added case to test/compile_errors.zig given floats
- explain upstream bug in llvm.smul.fix.sat and link to #9643 in langref and commented out test cases
* sat-arithmetic: skip mul tests if arch == .wasm32 because ci is erroring with 'LLVM ERROR: Unable to expand fixed point multiplication' when compiling for wasm32
