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Add error message for invalid syntax in s![] #714

Merged

bluss merged 1 commit into master from s-compile-error

Sep 16, 2019

Commits on Sep 16, 2019

FEAT: Add error message for invalid syntax in s![]

Invalid syntax, like for example empty `s![]` or clearly invalid
productions like `s![;;]` etc, end up in this new catch-all branch of
the macro and produce a clearer error message.

    error: Invalid syntax in s![], expected at least one index or range
      --> src/foo.rs:11:13
       |
    11 |     a.slice(s![]);
       |             ^^^^

bluss committed Sep 16, 2019