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76 lines
3.0 KiB
Racket
76 lines
3.0 KiB
Racket
#lang typed/racket/base
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(require (for-syntax racket/base) racket/match typed/sugar/define)
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(provide (all-defined-out))
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; Section 2.2 of XML 1.1
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; (XML 1.0 is slightly different and more restrictive)
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(define/typed (valid-char? i)
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(Any -> Boolean)
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(and (exact-nonnegative-integer? i)
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(or (<= #x1 i #xD7FF)
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(<= #xE000 i #xFFFD)
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(<= #x10000 i #x10FFFF))))
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(require/typed
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xml
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[#:struct location ([line : (Option Natural)]
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[char : (Option Natural)]
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[offset : Natural])]
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[#:struct source ([start : (U location Symbol #f)]
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[stop : (U location Symbol #f)])]
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[#:struct (cdata source) ([string : String])]
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[#:struct comment ([text : String])]
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[#:struct (p-i source) ([target-name : Symbol]
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[instruction : String])]
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[xexpr->string (Xexpr -> String)])
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(provide (all-from-out xml) cdata? xexpr->string)
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(define-type Valid-Char Natural) ;; overinclusive but that's as good as it gets
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(define-type Txexpr-Tag Symbol)
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(define-type Txexpr-Attr-Key Symbol)
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(define-type Txexpr-Attr-Value String)
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(define-type Txexpr-Attr (List Txexpr-Attr-Key Txexpr-Attr-Value))
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(define-predicate Txexpr-Attr? Txexpr-Attr)
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(define-type Can-Be-Txexpr-Attr-Key (U Symbol String))
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(define-type Can-Be-Txexpr-Attr-Value (U Symbol String))
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(define-type Txexpr-Attrs (Listof Txexpr-Attr))
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(define-type Txexpr-Attr-Hash (HashTable Txexpr-Attr-Key Txexpr-Attr-Value))
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(define-type Txexpr-Element Xexpr)
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(define-type Txexpr-Elements (Listof Txexpr-Element))
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(define-type Txexpr-Full (List* Txexpr-Tag Txexpr-Attrs (Listof Xexpr)))
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(define-type Txexpr-Short (Pairof Txexpr-Tag (Listof Xexpr)))
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(define-type Txexpr (U Txexpr-Full Txexpr-Short))
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(define-type Xexpr (Rec X
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(U String
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(List* Txexpr-Tag Txexpr-Attrs (Listof X))
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(Pairof Txexpr-Tag (Listof X))
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Symbol
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Valid-Char
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cdata
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comment
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p-i)))
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(define-predicate xexpr? Xexpr)
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(define-predicate txexpr? Txexpr)
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(define-predicate txexpr-short? Txexpr-Short)
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(define-predicate txexpr-tag? Txexpr-Tag)
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(define-predicate txexpr-tags? (Listof Txexpr-Tag))
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(define-predicate txexpr-attr? Txexpr-Attr)
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(define-predicate txexpr-attrs? Txexpr-Attrs)
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(define-predicate Valid-Char? Valid-Char)
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(define/typed (txexpr-element? x)
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(Any -> Boolean)
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(if (xexpr? x)
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(if (Valid-Char? x) (valid-char? x) #t)
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#f))
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(define-predicate txexpr-elements? (Listof Xexpr))
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(define-predicate txexpr-attr-key? Txexpr-Attr-Key)
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(define-predicate txexpr-attr-value? Txexpr-Attr-Value)
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(define-predicate txexpr-attr-values? (Listof Txexpr-Attr-Value))
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(define-predicate can-be-txexpr-attr-key? Can-Be-Txexpr-Attr-Key)
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(define-predicate can-be-txexpr-attr-value? Can-Be-Txexpr-Attr-Value)
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(define-predicate can-be-txexpr-attr? (List Can-Be-Txexpr-Attr-Key Can-Be-Txexpr-Attr-Value))
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(define-type Can-Be-Txexpr-Attr (U Txexpr-Attr Txexpr-Attrs Can-Be-Txexpr-Attr-Key Can-Be-Txexpr-Attr-Value))
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(define-predicate can-be-txexpr-attrs? Can-Be-Txexpr-Attr)
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(define-predicate list-of-can-be-txexpr-attrs? (Listof Can-Be-Txexpr-Attr)) |