82 lines
2.6 KiB
Racket
82 lines
2.6 KiB
Racket
#lang typed/racket
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(provide First-Comments
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Comments-After
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with-first-comments
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with-comments-after
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extract-first-comments
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extract-comments-after)
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(require "typed-syntax.rkt"
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"typed-pairof-predicate.rkt"
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typed-map)
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(define-type First-Comments
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(Rec R (Pairof (U #f (Pairof (Syntaxof 'saved-props+srcloc)
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R))
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(Listof ISyntax))))
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(define-type Comments-After
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(Listof ISyntax))
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(: first-comments? (→ Any Boolean : (Pairof (U #f (Pairof (Syntaxof 'saved-props+srcloc)
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First-Comments))
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(Listof ISyntax))))
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(define (first-comments? v)
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(define p? (inst pairof?
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(U #f (Pairof (Syntaxof 'saved-props+srcloc)
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First-Comments))
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(Listof ISyntax)))
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(p? v first-comments1? first-comments2?))
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(: first-comments1? (→ Any Boolean : (U #f (Pairof (Syntaxof 'saved-props+srcloc)
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First-Comments))))
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(define (first-comments1? v)
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(or (false? v)
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(first-comments11? v)))
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(: first-comments11? (→ Any Boolean : (Pairof (Syntaxof 'saved-props+srcloc)
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First-Comments)))
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(define (first-comments11? v)
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(define p? (inst pairof?
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(Syntaxof 'saved-props+srcloc)
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First-Comments))
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(p? v
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(make-predicate (Syntaxof 'saved-props+srcloc))
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first-comments?))
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(: first-comments2? (→ Any Boolean : (Listof ISyntax)))
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(define (first-comments2? v)
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(and (list? v)
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(andmap isyntax? v)))
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(: with-first-comments (∀ (A) (→ ISyntax
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(U #f First-Comments)
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ISyntax)))
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(define (with-first-comments e c)
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(if (or (not c) (and (= (length c) 1) (not (first c))))
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e
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(syntax-property e 'first-comments c)))
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(: with-comments-after (∀ (A) (→ (Syntaxof A)
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(U #f Comments-After)
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(Syntaxof A))))
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(define (with-comments-after e c)
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(if (or (not c) (null? c))
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e
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(syntax-property e 'comments-after c)))
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(: extract-first-comments (-> (Syntaxof Any) (U #f First-Comments)))
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(define (extract-first-comments stx)
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(define c (syntax-property stx 'first-comments))
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(if (first-comments? c)
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c
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#f))
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(: extract-comments-after (-> (Syntaxof Any) (U #f Comments-After)))
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(define (extract-comments-after stx)
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(define c (syntax-property stx 'comments-after))
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(and (list? c)
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(andmap isyntax? c)
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c)) |