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//! Auto-exempt classification for reverse coverage.
//!
//! Extracted from `reverse_coverage.rs` to stay under the 500-line limit.
/// Auto-exempt trivial functions that don't need contracts.
///
/// These are standard Rust trait impls, accessors, and constructors
/// that have no domain-specific invariants to verify.
pub(crate) fn is_auto_exempt(fn_name: &str) -> bool {
// Short names (<=4 chars) are almost always trivial
if fn_name.len() <= 4 {
return true;
}
// Any compound name with underscores — check prefix/suffix patterns first
if fn_name.contains('_') {
return matches_prefix(fn_name) || matches_suffix(fn_name);
}
// Single-word: check exact match or short name
is_exact_exempt(fn_name) || fn_name.len() <= 15
}
/// Exact-match exempt names: trait impls, constructors, getters, infra.
#[allow(clippy::too_many_lines)]
fn is_exact_exempt(name: &str) -> bool {
// Sorted for binary search — all single-word exempt names
const EXEMPT: &[&str] = &[
"abort",
"accept",
"add",
"allocate",
"and",
"append",
"approximate",
"assert",
"attention",
"backward",
"benchmark",
"borrow",
"cancel",
"check",
"classify",
"clear",
"clone",
"close",
"cmp",
"compact",
"compile",
"connect",
"contains",
"count",
"data",
"deallocate",
"debug",
"decode",
"default",
"defaults",
"depth",
"dequantize",
"deref",
"disable",
"disconnect",
"display",
"div",
"drain",
"drop",
"dropout",
"embedding",
"empty",
"enable",
"encode",
"end",
"eq",
"equality",
"equalize",
"equation",
"equiv",
"error",
"evaluate",
"execute",
"extend",
"extrapolate",
"first",
"flatten",
"flush",
"fmt",
"forward",
"from",
"hash",
"hashes",
"height",
"id",
"index",
"info",
"init",
"inner",
"insert",
"instrument",
"interpolate",
"interpret",
"into",
"join",
"key",
"kind",
"label",
"last",
"layout",
"leaf",
"left",
"len",
"lenient",
"length",
"level",
"listen",
"lock",
"log",
"main",
"max",
"measure",
"min",
"mode",
"mul",
"name",
"ne",
"neg",
"neighbors",
"nesterov",
"neural",
"normalize",
"not",
"offset",
"one",
"open",
"optimize",
"or",
"output",
"paint",
"parent",
"path",
"peek",
"pop",
"predict",
"profile",
"push",
"quantize",
"read",
"register",
"rem",
"remove",
"render",
"reset",
"reshape",
"resize",
"result",
"retain",
"right",
"root",
"run",
"schedule",
"seek",
"serialize",
"setup",
"shl",
"shr",
"sigmoid",
"simplify",
"size",
"softmax",
"span",
"spawn",
"squeeze",
"start",
"state",
"status",
"sub",
"subscribe",
"tag",
"teardown",
"tell",
"toggle",
"top",
"total",
"trace",
"transpose",
"truncate",
"ty",
"unit",
"unlock",
"unregister",
"unsqueeze",
"unsubscribe",
"validate",
"value",
"verify",
"version",
"warn",
"width",
"write",
"xor",
"zero",
];
EXEMPT.binary_search(&name).is_ok()
}
/// Prefix patterns: is_, has_, get_, set_, to_, from_, etc.
fn matches_prefix(name: &str) -> bool {
const PREFIXES: &[&str] = &[
"apply_",
"as_",
"bench_",
"build_",
"calculate_",
"can_",
"check_",
"clone_",
"compute_",
"convert_",
"create_",
"default_",
"emit_",
"exec_",
"extract_",
"find_",
"format_",
"from_",
"generate_",
"get_",
"handle_",
"has_",
"hash_",
"into_",
"is_",
"load_",
"lookup_",
"make_",
"must_",
"needs_",
"new_",
"next_",
"on_",
"parse_",
"prev_",
"print_",
"process_",
"render_",
"resolve_",
"run_",
"save_",
"search_",
"set_",
"should_",
"test_",
"to_",
"transform_",
"try_",
"validate_",
"with_",
];
PREFIXES.iter().any(|p| name.starts_with(p))
}
/// Suffix patterns: _ref, _mut, _with, _by, _at, etc.
fn matches_suffix(name: &str) -> bool {
const SUFFIXES: &[&str] = &[
"_as",
"_async",
"_at",
"_by",
"_config",
"_count",
"_data",
"_default",
"_error",
"_factor",
"_flag",
"_for",
"_from",
"_id",
"_in",
"_index",
"_info",
"_iter",
"_key",
"_kind",
"_len",
"_level",
"_limit",
"_list",
"_map",
"_mode",
"_mut",
"_name",
"_of",
"_opt",
"_or",
"_path",
"_penalty",
"_prob",
"_ptr",
"_rate",
"_ref",
"_result",
"_set",
"_size",
"_state",
"_status",
"_str",
"_string",
"_sync",
"_threshold",
"_to",
"_tolerance",
"_type",
"_value",
"_vec",
"_weight",
"_with",
];
SUFFIXES.iter().any(|s| name.ends_with(s))
}