rust/tests/ui/author/if.stdout

if let StmtKind::Let(local) = stmt.kind
    && let Some(init) = local.init
    && let ExprKind::If(cond, then, Some(else_expr)) = init.kind
    && let ExprKind::DropTemps(expr) = cond.kind
    && let ExprKind::Lit(ref lit) = expr.kind
    && let LitKind::Bool(true) = lit.node
    && let ExprKind::Block(block, None) = then.kind
    && block.stmts.len() == 1
    && let StmtKind::Semi(e) = block.stmts[0].kind
    && let ExprKind::Binary(op, left, right) = e.kind
    && BinOpKind::Eq == op.node
    && let ExprKind::Lit(ref lit1) = left.kind
    && let LitKind::Int(1, LitIntType::Unsuffixed) = lit1.node
    && let ExprKind::Lit(ref lit2) = right.kind
    && let LitKind::Int(1, LitIntType::Unsuffixed) = lit2.node
    && block.expr.is_none()
    && let ExprKind::Block(block1, None) = else_expr.kind
    && block1.stmts.len() == 1
    && let StmtKind::Semi(e1) = block1.stmts[0].kind
    && let ExprKind::Binary(op1, left1, right1) = e1.kind
    && BinOpKind::Eq == op1.node
    && let ExprKind::Lit(ref lit3) = left1.kind
    && let LitKind::Int(2, LitIntType::Unsuffixed) = lit3.node
    && let ExprKind::Lit(ref lit4) = right1.kind
    && let LitKind::Int(2, LitIntType::Unsuffixed) = lit4.node
    && block1.expr.is_none()
    && let PatKind::Wild = local.pat.kind
{
    // report your lint here
}
if let ExprKind::If(cond, then, Some(else_expr)) = expr.kind
    && let ExprKind::Let(let_expr) = cond.kind
    && let PatKind::Lit(lit_expr) = let_expr.pat.kind
    && let ExprKind::Lit(ref lit) = lit_expr.kind
    && let LitKind::Bool(true) = lit.node
    && let ExprKind::Path(ref qpath) = let_expr.init.kind
    && match_qpath(qpath, &["a"])
    && let ExprKind::Block(block, None) = then.kind
    && block.stmts.is_empty()
    && block.expr.is_none()
    && let ExprKind::Block(block1, None) = else_expr.kind
    && block1.stmts.is_empty()
    && block1.expr.is_none()
{
    // report your lint here
}