rustfmt.toml

# Run rustfmt with this config (it should be picked up automatically).
version = "Two"
use_small_heuristics = "Max"
merge_derives = false

# Files to ignore. Each entry uses gitignore syntax, but `!` prefixes aren't allowed.
ignore = [
    "/build/",
    "/*-build/",
    "/build-*/",
    "/vendor/",

    # Some tests are not formatted, for multiple reasons:
    # - some contain syntax errors that cause rustfmt to give an error
    # - some UI tests are broken by different formatting
    # - some require special comments in a particular position (e.g. `EMIT_MIR` comments)
    "/tests/codegen/simd-intrinsic/", # Many types like `u8x64` are better hand-formatted.
    "/tests/crashes/",                # Many tests contain syntax errors.
    "/tests/debuginfo/",              # Tests are somewhat sensitive to source code layout.
    "/tests/incremental/",            # Tests are somewhat sensitive to source code layout.
    "/tests/mir-opt/",
    "/tests/pretty/",
    "/tests/run-make/translation/test.rs", # Contains syntax errors.
    "/tests/run-make-fulldeps/",
    "/tests/run-pass-valgrind/",
    "/tests/rustdoc/",
    "/tests/rustdoc-gui/",
    "/tests/rustdoc-js/",
    "/tests/rustdoc-json/",
    "/tests/rustdoc-js-std/",
    "/tests/rustdoc-ui/",
    "/tests/ui/",
    "/tests/ui-fulldeps/",

    # Do not format submodules.
    # FIXME: sync submodule list with tidy/bootstrap/etc
    # tidy/src/walk.rs:filter_dirs
    "library/backtrace",
    "library/portable-simd",
    "library/stdarch",
    "compiler/rustc_codegen_gcc",
    "src/doc/book",
    "src/doc/edition-guide",
    "src/doc/embedded-book",
    "src/doc/nomicon",
    "src/doc/reference",
    "src/doc/rust-by-example",
    "src/doc/rustc-dev-guide",
    "src/llvm-project",
    "src/tools/cargo",
    "src/tools/clippy",
    "src/tools/miri",
    "src/tools/rust-analyzer",
    "src/tools/rustc-perf",
    "src/tools/rustfmt",

    # These are ignored by a standard cargo fmt run.
    "compiler/rustc_codegen_cranelift/scripts",
    "compiler/rustc_codegen_cranelift/example/gen_block_iterate.rs", # uses edition 2024
]