Bug 22543 – [spec] grammar blocks use unspecified notation

Newsgroup discussion: https://forum.dlang.org/post/[email protected] Blocks like: ``` SpecialTokenSequence: # line IntegerLiteral Filespecopt EndOfLine # line __LINE__ Filespecopt EndOfLine ``` ``` ByteOrderMark: \uFEFF Shebang: #! Charactersopt EndOfShebang EndOfShebang: \u000A EndOfFile ``` Have a certain meaning: - an identifier with a colon denotes a rule - the following lines denote alternatives - spaces between elements of a rule denote either immediate concatenation (lexical grammar), or optional separation by Comments and WhiteSpace (parsing grammar) - the 'opt' suffix means 'optional' - text in boldface denotes a string / character literal (lexical grammar) or single token (parsing grammar) But none of this is specified.

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