to retrieve a type from a pattern.
Two noticeable items here:
-- `cx` is the lint context [`LateContext`][LateContext].
- The two most useful data structures in this context are `tcx` and `tables`,
- allowing us to jump to type definitions and other compilation stages such as HIR.
-- `tables` is [`TypeckResults`][TypeckResults] and is created by type checking step,
- it includes useful information such as types of expressions, ways to resolve methods and so on.
+- `cx` is the lint context [`LateContext`][LateContext]. The two most useful
+ data structures in this context are `tcx` and the `TypeckResults` returned by
+ `LateContext::typeck_results`, allowing us to jump to type definitions and
+ other compilation stages such as HIR.
+- `typeck_results`'s return value is [`TypeckResults`][TypeckResults] and is
+ created by type checking step, it includes useful information such as types
+ of expressions, ways to resolve methods and so on.
# Checking if an expr is calling a specific method