Commit graph

4 commits

Author SHA1 Message Date
Aleksey Kladov
2bf81922f7 internal: more reasonable grammar for blocks
Consider these expples

        { 92 }
  async { 92 }
    'a: { 92 }
   #[a] { 92 }

Previously the tree for them were

  BLOCK_EXPR
    { ... }

  EFFECT_EXPR
    async
    BLOCK_EXPR
      { ... }

  EFFECT_EXPR
    'a:
    BLOCK_EXPR
      { ... }

  BLOCK_EXPR
    #[a]
    { ... }

As you see, it gets progressively worse :) The last two items are
especially odd. The last one even violates the balanced curleys
invariant we have (#10357) The new approach is to say that the stuff in
`{}` is stmt_list, and the block is stmt_list + optional modifiers

  BLOCK_EXPR
    STMT_LIST
      { ... }

  BLOCK_EXPR
    async
    STMT_LIST
      { ... }

  BLOCK_EXPR
    'a:
    STMT_LIST
      { ... }

  BLOCK_EXPR
    #[a]
    STMT_LIST
      { ... }
2021-09-26 19:16:09 +03:00
Marijn Suijten
42da26e959 parser,syntax: Add separate parser for stmt with optional semicolon
Adjusting `grammar::fragments::stmt` to Optional or Yes will break
original functionality and tests.
2021-01-03 12:05:52 +01:00
Marijn Suijten
cc081b7e1c syntax,ssr: Implement statement parsing 2021-01-03 11:29:33 +01:00
Aleksey Kladov
a1c187eef3 Rename ra_syntax -> syntax 2020-08-12 18:30:53 +02:00