100 lines
2.8 KiB
Scheme
100 lines
2.8 KiB
Scheme
;;;; symbol-environment-access.scm -*- Scheme -*-
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;;;; Kon Lovett, Jul '18
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(declare
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(bound-to-procedure
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##sys#macro-environment
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##sys#current-environment
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##sys#macro?))
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#|
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##sys namespace
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;alist
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module-table (list-of (pair module-identifier module))
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module-name (module --> symbol)
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(for-each (lambda (e) (assert (eq? (car e) (##sys#module-name (cdr e)))))
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##sys#module-table)
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module-alias-environment ???
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module-exports ???
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|#
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(include-relative "symbol-table-access")
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(module symbol-environment-access
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(;export
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;
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system-current-environment
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system-macro-environment
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;
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macro-symbol-in-environment?
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;
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search-macro-environment-symbols
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search-system-environment-symbols
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#; ;UNUSED
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search-environments-symbols
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;
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search-interaction-environment-symbols
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search-list-environment-symbols)
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(import scheme)
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(import (chicken base))
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(import (chicken type))
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#; ;UNUSED
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(import (only (srfi 1) append!))
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(import (prefix symbol-table-access symbol-table-))
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;opaque
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(define-type macro-environment list)
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(: system-current-environment (-> list))
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(: system-macro-environment (-> list))
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(: macro-symbol-in-environment? (symbol macro-environment -> boolean))
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(: search-list-environment-symbols ((* -> boolean) (list-of (pair symbol *)) #!optional (pair -> *) --> list))
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(: search-interaction-environment-symbols ((* -> boolean) -> list))
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(: search-macro-environment-symbols ((* -> boolean) (list-of (pair symbol *)) --> list))
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(: search-system-environment-symbols ((* -> boolean) #!optional (or (list-of (pair symbol *)) boolean) -> list))
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(: search-environments-symbols ((* -> boolean) -> list))
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;;
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(define-inline (cons-if test? x xs) (if (test? x) (cons x xs) xs))
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;;
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(define system-current-environment ##sys#current-environment)
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(define system-macro-environment ##sys#macro-environment)
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(define macro-symbol-in-environment? ##sys#macro?)
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;;
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(define (search-list-environment-symbols test? env #!optional (elmref car))
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(define (cons-if-symbol syms cell) (cons-if test? (elmref cell) syms))
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(foldl cons-if-symbol '() env) )
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(define (search-interaction-environment-symbols test?)
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(symbol-table-cursor-foldl (lambda (syms sym) (cons-if test? sym syms)) '()) )
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;;
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(define (search-macro-environment-symbols test? env)
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(search-list-environment-symbols test? env) )
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(define (search-system-environment-symbols test? #!optional env)
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(if (list? env)
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(search-list-environment-symbols test? env)
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(search-interaction-environment-symbols test?) ) )
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;;
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#; ;UNUSED
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(define (search-environments-symbols test?)
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(append! (search-macro-environment-symbols test? (system-macro-environment))
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(search-system-environment-symbols test? (system-current-environment))
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(search-system-environment-symbols test?)) )
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) ;module symbol-environment-access
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