48 lines
1.9 KiB
Plaintext
48 lines
1.9 KiB
Plaintext
#!/usr/bin/env janet
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(def to-ast
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"A custom markdown flavored grammar"
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~{
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# Symbole
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:end-of-line (* (? "\r") "\n")
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:space "\u0020"
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:tab (+ "\u0009" (4 :space))
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:code-block-tag "```"
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:list-item-starter (+ "*" "-")
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:italic-tag "*"
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:bold-tag "**"
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:stroke-tag "~~"
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:code-line-tag "`"
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:rich-text-tag (+ :italic-tag :bold-tag :stroke-tag :code-line-tag)
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:basic-text (some (if-not (+ :end-of-line :code-line-tag :stroke-tag :bold-tag :italic-tag) 1))
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:c-basic-text (cmt (<- :basic-text),|[:text $0])
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:bold (cmt (* :bold-tag :rich-text :bold-tag),|[:bold $0 $&])
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:italic (cmt (* :italic-tag :rich-text :italic-tag),|[:italic $0 $&])
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:stroke (cmt (* :stroke-tag :rich-text :stroke-tag),|[:stroke $0 $&])
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:code-line (cmt (* :code-line-tag (<- :rich-text) :code-line-tag),|[:code-line $0 $&])
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:rich-text (cmt (some (+ :code-line :bold :italic :stroke :c-basic-text)),|(map (fn [arg] [(get arg 0) (get arg 1)]) $&))
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:line (cmt (* :rich-text :end-of-line),|[:line $0])
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# Block
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:heading (cmt (* (<- (between 1 6 "#")) :space (<- :basic-text)),|[:heading (length $0) $1])
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:hr (cmt (* (at-least 3 (+ "-" "_" "*")) :end-of-line),|[:hr])
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:code-block (cmt (* :code-block-tag (? (<- :basic-text)) :end-of-line (<- (some (if-not :code-block-tag 1))) :code-block-tag),|[:code-block $0 $1])
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:quote (cmt (* ">" :space (? :rich-text)),|[:quote $0])
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:list-item (cmt (* (<- (? (between 0 2 :tab))) :list-item-starter :space :rich-text),|[:list-item (/ (length $0) 4) $1])
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:list (cmt (some (* :list-item (? :end-of-line))),|[:list $&])
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:block (+ :heading
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:hr
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:code-block
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:quote
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:list
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:line
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:end-of-line)
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:main (some (* :block (? :end-of-line)))})
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