src/hir/debugging.md - rust-lang/rustc-dev-guide - Git at Google

 # HIR Debugging

 Use the `-Z unpretty=hir` flag to produce a human-readable representation of the HIR.
 For cargo projects this can be done with `cargo rustc -- -Z unpretty=hir`.
 This output is useful when you need to see at a glance how your code was desugared and transformed
 during AST lowering.

 For a full `Debug` dump of the data in the HIR, use the `-Z unpretty=hir-tree` flag.
 This may be useful when you need to see the full structure of the HIR from the perspective of the
 compiler.

 If you are trying to correlate `NodeId`s or `DefId`s with source code, the
 `-Z unpretty=expanded,identified` flag may be useful.

 TODO: anything else? [#1159](https://github.com/rust-lang/rustc-dev-guide/issues/1159)
	# HIR Debugging

	Use the `-Z unpretty=hir` flag to produce a human-readable representation of the HIR.
	For cargo projects this can be done with `cargo rustc -- -Z unpretty=hir`.
	This output is useful when you need to see at a glance how your code was desugared and transformed
	during AST lowering.

	For a full `Debug` dump of the data in the HIR, use the `-Z unpretty=hir-tree` flag.
	This may be useful when you need to see the full structure of the HIR from the perspective of the
	compiler.

	If you are trying to correlate `NodeId`s or `DefId`s with source code, the
	`-Z unpretty=expanded,identified` flag may be useful.

	TODO: anything else? [#1159](https://github.com/rust-lang/rustc-dev-guide/issues/1159)