Method macros #15646
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Method macros #15646
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This change propagates to many locations, but because of the Macro Exterminator (or, more properly, the invariant that it protects), macro invocations can't occur downstream of expansion. This means that in librustc and librustdoc, extracting the desired field can simply assume that it can't be a macro invocation. Functions in ast_util abstract over this check.
This is nice for macros, to allow them to expand into multiple methods
nothing wrong with a statement expanding into 0 stmts, that I can see.
this allows macro results to be parsed as methods
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Tidy issues: https://travis-ci.org/rust-lang/rust/jobs/29834978 |
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@sfackler fixed, thanks! |
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r=me with the test and fix for the test squashed |
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cmr: which test squashed? one commit is a run-pass test, the other is a unit test. Or am I misunderstanding you? |
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You're right, my bad. |
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Jul 13, 2014
This patch adds support for macros in method position. It follows roughly the template for Item macros, where an outer `Method` wrapper contains a `Method_` enum which can either be a macro invocation or a standard macro definition. One note; adding support for macros that expand into multiple methods is not included here, but should be a simple parser change, since this patch updates the type of fold_macro to return a smallvector of methods. For reviewers, please pay special attention to the parser changes; these are the ones I'm most concerned about. Because of the small change to the interface of fold_method, this is a ... [breaking change]
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On Jul 14, 2014, at 7:06 AM, Mitchell Nordine [email protected] wrote:
Can you provide an example? Many thanks, John Clements |
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This patch adds support for macros in method position. It follows roughly the template for Item macros, where an outer
Methodwrapper contains aMethod_enum which can either be a macro invocation or a standard macro definition.One note; adding support for macros that expand into multiple methods is not included here, but should be a simple parser change, since this patch updates the type of fold_macro to return a smallvector of methods.
For reviewers, please pay special attention to the parser changes; these are the ones I'm most concerned about.
Because of the small change to the interface of fold_method, this is a ...
[breaking change]