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| author | mark <markm@cs.wisc.edu> | 2020-04-30 11:36:47 -0500 |
|---|---|---|
| committer | Who? Me?! <mark-i-m@users.noreply.github.com> | 2020-05-08 09:42:27 -0500 |
| commit | 9fa8ceeb1bf902ab0804d30c0445dea0987ef7aa (patch) | |
| tree | f972e208b0d0f699cd4a9933dff53c20c83f5539 /src/doc/rustc-dev-guide | |
| parent | 6b1f713d7296ed71ba2dfda32472f2e6a9fe7828 (diff) | |
| download | rust-9fa8ceeb1bf902ab0804d30c0445dea0987ef7aa.tar.gz rust-9fa8ceeb1bf902ab0804d30c0445dea0987ef7aa.zip | |
add note about macros in parser chapter
Diffstat (limited to 'src/doc/rustc-dev-guide')
| -rw-r--r-- | src/doc/rustc-dev-guide/src/the-parser.md | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/doc/rustc-dev-guide/src/the-parser.md b/src/doc/rustc-dev-guide/src/the-parser.md index c84ac4ea2e1..c0f2a071b53 100644 --- a/src/doc/rustc-dev-guide/src/the-parser.md +++ b/src/doc/rustc-dev-guide/src/the-parser.md @@ -38,6 +38,11 @@ To minimise the amount of copying that is done, both the `StringReader` and `Parser` have lifetimes which bind them to the parent `ParseSess`. This contains all the information needed while parsing, as well as the `SourceMap` itself. +Note that while parsing, we may encounter macro definitions or invocations. We +set these aside to be expanded (see [this chapter](./macro-expansion.md)). +Expansion may itself require parsing the output of the macro, which may reveal +more macros to be expanded, and so on. + ## More on Lexical Analysis Code for lexical analysis is split between two crates: |