emit diagnostic suggestion for error when if let used with enum varia… #102062
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…nt without being initialized
compare the span base id to get the correct expression and add suggestion to it
modified: compiler/rustc_infer/src/infer/error_reporting/mod.rs
modified: compiler/rustc_span/src/span_encoding.rs
modified: compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs
modified: compiler/rustc_typeck/src/check/compare_method.rs
modified: compiler/rustc_typeck/src/check/fn_ctxt/checks.rs
new file: src/test/ui/type/issue-101208.rs
new file: src/test/ui/type/issue-101208.stderr