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108 lines
3.0 KiB
Markdown
108 lines
3.0 KiB
Markdown
section 2eI, parsing (external)
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===============================
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### `++rash`
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Parse or crash
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++ rash |*([naf=@ sab=_rule] (scan (trip naf) sab)) ::
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Parse a cord with a given rule and crash if the cord isn't entirely
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parsed.
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`naf` is an [atom]().
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`sab` is a [rule]().
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~zod/try=> (rash 'I was the world in which I walked, and what I saw' (star (shim 0 200)))
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"I was the world in which I walked, and what I saw"
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~zod/try=> (rash 'abc' (just 'a'))
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! {1 2}
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! 'syntax-error'
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! exit
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~zod/try=> (rash 'abc' (jest 'abc'))
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'abc'
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`~zod/try=> (rash 'abc' (jest 'ab'))
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! {1 3}
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! 'syntax-error'
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! exit
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------------------------------------------------------------------------
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### `++rush`
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Parse or null
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++ rush |*([naf=@ sab=_rule] (rust (trip naf) sab))
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Parse a given with a given rule and produce null if the cord isn't
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entirely parsed.
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`naf` is an [atom]().
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`sab` is a [rule]().
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~zod/try=> (rush 'I was the world in which I walked, and what I saw' (star (shim 0 200)))
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[~ "I was the world in which I walked, and what I saw"]
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~zod/try=> (rush 'abc' (just 'a'))
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~
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~zod/try=> (rush 'abc' (jest 'abc'))
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[~ 'abc']
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~zod/try=> (rush 'abc' (jest 'ac'))
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~
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~zod/try=> (rush 'abc' (jest 'ab'))
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~
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------------------------------------------------------------------------
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### `++rust`
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Parse tape or null
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++ rust |* [los=tape sab=_rule]
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=+ vex=((full sab) [[1 1] los])
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?~(q.vex ~ [~ u=p.u.q.vex])
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Parse a tape with a given rule and produce null if the tape isn't
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entirely parsed.
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`los` is a [tape]().
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`sab` is a [rule]().
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~zod/try=> (rust "I was the world in which I walked, and what I saw" (star (shim 0 200)))
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[~ "I was the world in which I walked, and what I saw"]
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~zod/try=> (rust "Or heard or felt came not but from myself;" (star (shim 0 200)))
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[~ "Or heard or felt came not but from myself;"]
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~zod/try=> (rust "And there I found myself more truly and more strange." (jest 'And there I'))
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~
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------------------------------------------------------------------------
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### `++scan`
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Parse tape or crash
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++ scan |* [los=tape sab=_rule]
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=+ vex=((full sab) [[1 1] los])
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?~ q.vex
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~_ (show [%m '{%d %d}'] p.p.vex q.p.vex ~)
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~|('syntax-error' !!)
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p.u.q.vex
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Parse a tape with a given rule and crash if the tape isn't entirely
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parsed.
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`los` is a [tape]().
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`sab` is a [rule]().
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~zod/try=> (scan "I was the world in which I walked, and what I saw" (star (shim 0 200)))
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"I was the world in which I walked, and what I saw"
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~zod/try=> (scan "Or heard or felt came not but from myself;" (star (shim 0 200)))
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"Or heard or felt came not but from myself;"
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~zod/try=> (scan "And there I found myself more truly and more strange." (jest 'And there I'))
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! {1 12}
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! 'syntax-error'
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! exit
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