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许杰友 Jieyou Xu (Joe) 2025-05-12 21:32:54 +08:00 committed by GitHub
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<!-- toc --> <!-- toc -->
> N.B. [`rustc_ast`], [`rustc_expand`], and [`rustc_builtin_macros`] are all
> undergoing refactoring, so some of the links in this chapter may be broken.
Rust has a very powerful macro system. In the previous chapter, we saw how Rust has a very powerful macro system. In the previous chapter, we saw how
the parser sets aside macros to be expanded (using temporary [placeholders]). the parser sets aside macros to be expanded (using temporary [placeholders]).
This chapter is about the process of expanding those macros iteratively until This chapter is about the process of expanding those macros iteratively until