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Move match_function_call to utils

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This commit is contained in:
Matthias Seiffert 2019-10-10 10:57:12 +02:00
parent 5317efb8b5
commit 37a2de1562
2 changed files with 25 additions and 21 deletions
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22
clippy_lints/src/assertions_on_constants.rs
View File

@ -1,6 +1,6 @@
use crate::consts::{constant, Constant};
use crate::utils::paths;
use crate::utils::{is_direct_expn_of, is_expn_of, match_def_path, snippet_opt, span_help_and_lint};
use crate::utils::{is_direct_expn_of, is_expn_of, match_function_call, snippet_opt, span_help_and_lint};
use if_chain::if_chain;
use rustc::hir::*;
use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
@ -145,23 +145,3 @@ fn match_assert_with_message<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &'tcx E
}
None
}
/// Matches a function call with the given path and returns the arguments.
///
/// Usage:
///
/// ```rust,ignore
/// if let Some(args) = match_function_call(cx, begin_panic_call, &paths::BEGIN_PANIC);
/// ```
fn match_function_call<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr, path: &[&str]) -> Option<&'a [Expr]> {
if_chain! {
if let ExprKind::Call(ref fun, ref args) = expr.kind;
if let ExprKind::Path(ref qpath) = fun.kind;
if let Some(fun_def_id) = cx.tables.qpath_res(qpath, fun.hir_id).opt_def_id();
if match_def_path(cx, fun_def_id, path);
then {
return Some(&args)
}
};
None
}

24
clippy_lints/src/utils/mod.rs
View File

@ -1085,6 +1085,30 @@ pub fn has_iter_method(cx: &LateContext<'_, '_>, probably_ref_ty: Ty<'_>) -> Opt
None
}
/// Matches a function call with the given path and returns the arguments.
///
/// Usage:
///
/// ```rust,ignore
/// if let Some(args) = match_function_call(cx, begin_panic_call, &paths::BEGIN_PANIC);
/// ```
pub fn match_function_call<'a, 'tcx>(
cx: &LateContext<'a, 'tcx>,
expr: &'tcx Expr,
path: &[&str],
) -> Option<&'a [Expr]> {
if_chain! {
if let ExprKind::Call(ref fun, ref args) = expr.kind;
if let ExprKind::Path(ref qpath) = fun.kind;
if let Some(fun_def_id) = cx.tables.qpath_res(qpath, fun.hir_id).opt_def_id();
if match_def_path(cx, fun_def_id, path);
then {
return Some(&args)
}
};
None
}
#[cfg(test)]
mod test {
use super::{trim_multiline, without_block_comments};