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syntax: indicate an error when a macro ignores trailing tokens. #9673

Merged
merged 2 commits into from
Oct 2, 2013
Merged

syntax: indicate an error when a macro ignores trailing tokens. #9673

merged 2 commits into from
Oct 2, 2013

Commits on Oct 2, 2013

  1. syntax: remove some dead code.

    @huonw
    huonw committed Oct 2, 2013
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  2. syntax: indicate an error when a macro ignores trailing tokens. 

    That is, only a single expression or item gets parsed, so if there are
any extra tokens (e.g. the start of another item/expression) the user
should be told, rather than silently dropping them.

An example:

    macro_rules! foo {
        () => {
            println("hi");
            println("bye);
        }
    }

would expand to just `println("hi")`, which is almost certainly not
what the programmer wanted.

Fixes rust-lang#8012.
    @huonw
    huonw committed Oct 2, 2013
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