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Special-case literals in `parse_bottom_expr`. #61612

Merged

bors merged 1 commit into rust-lang:master from nnethercote:improve-parse_bottom_expr

Jun 12, 2019

Commits on Jun 10, 2019

Special-case literals in parse_bottom_expr.

This makes parsing faster, particularly for code with large constants,
for two reasons:
- it skips all the keyword comparisons for literals;
- it replaces the unnecessary `parse_literal_maybe_minus` call with
  `parse_lit`, avoiding an unnecessary allocation via `mk_expr`.

nnethercote committed Jun 10, 2019