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ABNF grammar support #1017

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wants to merge 7 commits into from
Closed

ABNF grammar support #1017

wants to merge 7 commits into from

Commits on Oct 12, 2021

  1. Added support for grammar in ABNF format (RFC5234)

    @t-higuchi
    t-higuchi committed Oct 12, 2021
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  2. Fix lexer to allow any character in terminal names. 

    This fix is needed for ABNF grammar support.
    @t-higuchi
    t-higuchi committed Oct 12, 2021
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  3. Added '%import' extension to ABNF grammar 

    Syntax:
 %import module
 %import module (rule1, rule2, ...)

Example:
 %import core-rules                ; import rules from lark/grammars/core-rules.abnf
 %import core-rules (CRLF, DIGITS) ; import specified rules (CRLF and DIGITS) only
    @t-higuchi
    t-higuchi committed Oct 12, 2021
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  4. added the ABNF core rules, defined in RFC5234 appendix B.1, to the st… 

    …andard library.
    @t-higuchi
    t-higuchi committed Oct 12, 2021
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  5. Added tests for %import directive in ABNF grammar

    @t-higuchi
    t-higuchi committed Oct 12, 2021
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  6. Added 'abnf_alias' decorator for transformer and visitor classes

    @t-higuchi
    t-higuchi committed Oct 12, 2021
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  7. Added example of creating parser using ABNF grammar

    @t-higuchi
    t-higuchi committed Oct 12, 2021
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