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* module/Makefile.am (SOURCES): Add `system/base/message.scm'. * module/scripts/compile.scm (%options): Add `--warn'. (parse-args): Update default value for `warnings'. (show-warning-help): New procedure. (compile)[compile-opts]: Add `#:warnings'. Update help message. * module/system/base/compile.scm (compile): Sanity-check the requested warnings. * module/system/base/message.scm: New file.
102 lines
3.1 KiB
Scheme
102 lines
3.1 KiB
Scheme
;;; User interface messages
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;; Copyright (C) 2009 Free Software Foundation, Inc.
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;;; This library is free software; you can redistribute it and/or
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;;; modify it under the terms of the GNU Lesser General Public
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;;; License as published by the Free Software Foundation; either
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;;; version 3 of the License, or (at your option) any later version.
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;;;
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;;; This library is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;; Lesser General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU Lesser General Public
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;;; License along with this library; if not, write to the Free Software
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;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;; Commentary:
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;;;
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;;; This module provide a simple interface to send messages to the user.
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;;; TODO: Internationalize messages.
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;;;
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;;; Code:
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(define-module (system base message)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:export (*current-warning-port* warning
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warning-type? warning-type-name warning-type-description
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warning-type-printer lookup-warning-type
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%warning-types))
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;;;
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;;; Source location
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;;;
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(define (location-string loc)
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(if (pair? loc)
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(format #f "~a:~a:~a"
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(or (assoc-ref loc 'filename) "<stdin>")
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(1+ (assoc-ref loc 'line))
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(assoc-ref loc 'column))
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"<unknown-location>"))
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;;;
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;;; Warnings
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;;;
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(define *current-warning-port*
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;; The port where warnings are sent.
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(make-fluid))
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(fluid-set! *current-warning-port* (current-error-port))
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(define-record-type <warning-type>
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(make-warning-type name description printer)
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warning-type?
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(name warning-type-name)
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(description warning-type-description)
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(printer warning-type-printer))
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(define %warning-types
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;; List of know warning types.
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(map (lambda (args)
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(apply make-warning-type args))
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`((unsupported-warning ;; a "meta warning"
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"warn about unknown warning types"
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,(lambda (port unused name)
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(format port "warning: unknown warning type `~A'~%"
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name)))
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(unused-variable
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"report unused variables"
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,(lambda (port loc name)
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(format port "~A: warning: unused variable `~A'~%"
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loc name))))))
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(define (lookup-warning-type name)
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"Return the warning type NAME or `#f' if not found."
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(find (lambda (wt)
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(eq? name (warning-type-name wt)))
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%warning-types))
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(define (warning type location . args)
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"Emit a warning of type TYPE for source location LOCATION (a source
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property alist) using the data in ARGS."
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(let ((wt (lookup-warning-type type))
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(port (fluid-ref *current-warning-port*)))
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(if (warning-type? wt)
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(apply (warning-type-printer wt)
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port (location-string location)
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args)
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(format port "~A: unknown warning type `~A': ~A~%"
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(location-string location) type args))))
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;;; message.scm ends here
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