rustfmt.toml

#-- ./rustfmt.toml

# Formatting preferences for the BitNode Console workspace.
# Keep code readable, consistent, and aligned with modern Rust style.
#
# Only stable rustfmt options are configured here so `cargo fmt` on the pinned
# stable toolchain (see rust-toolchain.toml) produces deterministic output.
# Nightly-only options (group_imports, imports_granularity, wrap_comments, …)
# are intentionally omitted; revisit if we ever run `cargo +nightly fmt` in CI.

# Rust edition targeted by the formatter. Must track the `edition` field used
# by workspace crates so idiomatic syntax (e.g. `let ... else`) is respected.
edition = "2024"

# Layout width settings. `max_width` is the hard line cap; `chain_width` gives
# method chains a slightly tighter budget so long fluent calls break earlier.
max_width = 100
chain_width = 80

# Indentation: spaces, four per level (the community default, made explicit).
hard_tabs = false
tab_spaces = 4

# Let rustfmt pick line endings based on the file being formatted, so Windows
# checkouts don't churn on LF/CRLF differences.
newline_style = "Auto"

# "Default" small-heuristics keeps rustfmt's built-in width ratios for arrays,
# structs, function calls, etc. — the same behaviour most Rust projects use.
use_small_heuristics = "Default"

# Import and module ordering. rustfmt will alphabetise `use` statements within
# a group and sort `mod` declarations, keeping diffs stable across contributors.
reorder_imports = true
reorder_modules = true

# Always leave a trailing comma after the final arm in a block-style `match`,
# which produces cleaner diffs when new arms are added.
match_block_trailing_comma = true

# Function parameter layout when a signature spills across lines. "Tall" stacks
# each parameter on its own line (this replaces the deprecated `fn_args_layout`).
fn_params_layout = "Tall"

# Modernisation / lint-style rewrites applied on every format pass:
# - use_field_init_shorthand: `Foo { x }` instead of `Foo { x: x }`.
# - use_try_shorthand:        forbids the legacy `try!(..)` macro, requires `?`.
# - merge_derives:            collapses adjacent `#[derive(..)]` into one attr.
# - force_explicit_abi:       requires `extern "C"` rather than bare `extern`.
# - remove_nested_parens:     strips redundant parentheses like `((x))`.
use_field_init_shorthand = true
use_try_shorthand = true
merge_derives = true
force_explicit_abi = true
remove_nested_parens = true