use crate::consts::{constant, Constant};
use crate::utils::{is_expn_of, match_def_path, match_type, paths, span_help_and_lint, span_lint};
use if_chain::if_chain;
-use regex_syntax;
use rustc::hir::*;
use rustc::impl_lint_pass;
use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};