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Article contents:== Outdated egg! This is an egg for CHICKEN 4, the unsupported old release. You're almost certainly looking for [[/eggref/5/condition-utils|the CHICKEN 5 version of this egg]], if it exists. If it does not exist, there may be equivalent functionality provided by another egg; have a look at the [[https://wiki.call-cc.org/chicken-projects/egg-index-5.html|egg index]]. Otherwise, please consider porting this egg to the current version of CHICKEN. [[tags: egg]] == condition-utils SRFI 12 Condition Utilities [[toc:]] == Documentation Convenience API for constructing common Chicken exception conditions, predicates, and accessors. === Argument Conventions {{LOC}} is a {{symbol}}, or {{#f}}. {{MSG}} is a {{string}}, or {{#f}}. {{ARGS}} is a {{list}}, or {{#f}}. {{CALL-CHAIN}} is the result of {{(get-call-chain)}}, or {{#f}}. {{CONDITION}} is a {{property-condition}}. {{CONDITION-SPEC}} is a: ; {{CONDITION}} : a condition object ; {{symbol}} : {{(make-property-condition <symbol>)}} ; {{list}} : {{(apply make-property-condition <list>)}} {{KIND}} is a {{symbol}}. {{PROP}} is a {{symbol}}. === Usage <enscript language=scheme> (require-extension condition-utils) </enscript> === make-exn-condition <procedure>(make-exn-condition [LOC [MSG [ARGS [CALL-CHAIN]]]]) --> property-condition</procedure> Returns an {{exn}} {{property-condition}} with optional {{location}}, {{arguments}}, and {{call-chain}} property values. Defaults: ; {{LOC}} : missing ; {{MSG}} : {{"unknown"}} ; {{ARGS}} : missing ; {{CALL-CHAIN}} : missing Will always include {{message}} property in the {{property-condition}}. === make-exn-condition+ <procedure>(make-exn-condition+ LOC MSG ARGS [CALL-CHAIN] [CONDITION-SPEC...]) --> property-condition</procedure> Returns a {{composite-condition}} {{exn CONDITION-SPEC...}}. When one-of {{LOC}}, {{MSG}}, or {{ARGS}} is without a useful value in the error context use {{#f}} as the actual argument. The optional {{CALL-CHAIN}} argument is detected by structure. When {{MSG}} is {{#f}} the value {{"unknown"}} is used. === make-condition+ <procedure>(make-condition+ CONDITION-SPEC...) --> property-condition</procedure> Returns a {{composite-condition}} {{CONDITION-SPEC...}}. === make-condition-predicate <macro>(make-condition-predicate KIND...) --> (procedure (*) boolean)</macro> Returns a {{condition-predicate}} for {{KIND...}}. === make-condition-property-accessor <macro>(make-condition-property-accessor KIND PROP [DEFAULT]) --> (procedure (*) boolean)</macro> Returns a {{condition-property-accessor}} for {{KIND PROP}}. The default value of {{DEFAULT}} is {{#f}}. === condition-irritants <procedure>(condition-irritants CONDITION) --> list</procedure> Returns a list of the condition properties for the condition {{CONDITION}}. The form of the list, alist vs. plist, is dependent on the result of the system procedure {{condition->list}}. The properties are without associated condition information. === write-exn-condition <procedure>(write-exn-condition CONDITION [PORT (current-output-port) [HEADER "Error" [CHAIN-HEADER "\n\tCall history:\n"]]])</procedure> Produces on {{PORT}} the form: Error: (<location - if any>) <message - if any>: <arguments - if any> +: <condition-kind>: <condition-property> ... ... for a composite condition ... Call history: <call-chain> The call-chain may not be available. === write-condition <procedure>(write-condition CONDITION [PORT (current-output-port) [HEADER "Error"]])</procedure> Produces on {{PORT}} the form: Error: <condition-kind>: <condition-property> ... +: <condition-kind>: <condition-property> ... ... for a composite condition ... === condition-predicate* <procedure>(condition-predicate* KIND) --> (* -> boolean : condition)</procedure> Returns a "memoized" {{condition-predicate}} for {{KIND}}. === condition-property-accessor* <procedure>(condition-property-accessor* KIND PROP [DEFAULT #f]) --> (condition --> *)</procedure> Returns a "memoized" {{condition-property-accessor}} for {{KIND}}. === Standard Condition Library ==== Usage <enscript language=scheme> (require-extension standard-conditions) </enscript> ==== Condition Predicates ===== exn-condition? <procedure>(exn-condition? CONDITION) --> boolean</procedure> ===== arity-condition? <procedure>(arity-condition? CONDITION) --> boolean</procedure> ===== type-condition? <procedure>(type-condition? CONDITION) --> boolean</procedure> ===== arithmetic-condition? <procedure>(arithmetic-condition? CONDITION) --> boolean</procedure> ===== i/o-condition? <procedure>(i/o-condition? CONDITION) --> boolean</procedure> ===== file-condition? <procedure>(file-condition? CONDITION) --> boolean</procedure> ===== network-condition? <procedure>(network-condition? CONDITION) --> boolean</procedure> ===== network-timeout-condition? <procedure>(network-timeout-condition? CONDITION) --> boolean</procedure> ===== bounds-condition? <procedure>(bounds-condition? CONDITION) --> boolean</procedure> ===== runtime-condition? <procedure>(runtime-condition? CONDITION) --> boolean</procedure> ===== runtime-limit-condition? <procedure>(runtime-limit-condition? CONDITION) --> boolean</procedure> ===== runtime-cycle-condition? <procedure>(runtime-cycle-condition? CONDITION) --> boolean</procedure> ===== match-condition? <procedure>(match-condition? CONDITION) --> boolean</procedure> ===== syntax-condition? <procedure>(syntax-condition? CONDITION) --> boolean</procedure> ===== process-condition? <procedure>(process-condition? CONDITION) --> boolean</procedure> ===== access-condition? <procedure>(access-condition? CONDITION) --> boolean</procedure> ===== domain-condition? <procedure>(domain-condition? CONDITION) --> boolean</procedure> ===== memory-condition? <procedure>(memory-condition? CONDITION) --> boolean</procedure> ==== Condition Property Accessors ===== exn-location <procedure>(exn-location CONDITION) --> *</procedure> ===== exn-message <procedure>(exn-message CONDITION) --> *</procedure> ===== exn-arguments <procedure>(exn-arguments CONDITION) --> *</procedure> ===== exn-call-chain <procedure>(exn-call-chain CONDITION) --> *</procedure> === HTTP Client Condition Library ==== Usage <enscript language=scheme> (require-extension http-client-conditions) </enscript> ==== Condition Predicates ===== http-condition? <procedure>(http-condition? CONDITION) --> boolean</procedure> ===== client-error-condition? <procedure>(client-error-condition? CONDITION) --> boolean</procedure> ===== server-error-condition? <procedure>(server-error-condition? CONDITION) --> boolean</procedure> ===== unexpected-server-response-condition? <procedure>(unexpected-server-response-condition? CONDITION) --> boolean</procedure> ===== redirect-depth-exceeded-condition? <procedure>(redirect-depth-exceeded-condition? CONDITION) --> boolean</procedure> ===== unsupported-uri-scheme-condition? <procedure>(unsupported-uri-scheme-condition? CONDITION) --> boolean</procedure> ===== unknown-authtype-condition? <procedure>(unknown-authtype-condition? CONDITION) --> boolean</procedure> ==== Condition Property Accessors ===== client-error-response <procedure>(client-error-response CONDITION) --> *</procedure> ===== client-error-body <procedure>(client-error-body CONDITION) --> *</procedure> ===== server-error-response <procedure>(server-error-response CONDITION) --> *</procedure> ===== server-error-body <procedure>(server-error-body CONDITION) --> *</procedure> ===== unexpected-server-response-response <procedure>(unexpected-server-response-response CONDITION) --> *</procedure> ===== unexpected-server-response-body <procedure>(unexpected-server-response-body CONDITION) --> *</procedure> ===== redirect-depth-exceeded-uri <procedure>(redirect-depth-exceeded-uri CONDITION) --> *</procedure> ===== formdata-error-condition? <procedure>(formdata-error-condition? CONDITION) --> boolean</procedure> ===== unsupported-uri-scheme-uri-scheme <procedure>(unsupported-uri-scheme-uri-scheme CONDITION) --> *</procedure> ===== unsupported-uri-scheme-request-uri <procedure>(unsupported-uri-scheme-request-uri CONDITION) --> *</procedure> ===== unknown-authtype-authtype <procedure>(unknown-authtype-authtype CONDITION) --> *</procedure> === Intarweb Condition Library ==== Usage <enscript language=scheme> (require-extension intarweb-conditions) </enscript> ==== Condition Predicates ===== http-condition? <procedure>(http-condition? CONDITION) --> boolean</procedure> ===== urlencoded-request-data-limit-exceeded? <procedure>(urlencoded-request-data-limit-exceeded? CONDITION) --> boolean</procedure> ===== line-limit-exceeded? <procedure>(line-limit-exceeded? CONDITION) --> boolean</procedure> ===== header-error? <procedure>(header-error? CONDITION) --> boolean</procedure> ===== header-limit-exceeded? <procedure>(header-limit-exceeded? CONDITION) --> boolean</procedure> ===== unknown-protocol-line? <procedure>(unknown-protocol-line? CONDITION) --> boolean</procedure> ===== unknown-protocol? <procedure>(unknown-protocol? CONDITION) --> boolean</procedure> ===== unknown-code? <procedure>(unknown-code? CONDITION) --> boolean</procedure> ===== unknown-status? <procedure>(unknown-status? CONDITION) --> boolean</procedure> ===== rfc1123-subparser? <procedure>(rfc1123-subparser? CONDITION) --> boolean</procedure> ===== rfc850-subparser? <procedure>(rfc850-subparser? CONDITION) --> boolean</procedure> ===== asctime-subparser? <procedure>(asctime-subparser? CONDITION) --> boolean</procedure> ===== http-date-subparser? <procedure>(http-date-subparser? CONDITION) --> boolean</procedure> ===== unencoded-header? <procedure>(unencoded-header? CONDITION) --> boolean</procedure> ===== username-with-colon? <procedure>(username-with-colon? CONDITION) --> boolean</procedure> ==== Condition Property Accessors ===== urlencoded-request-data-limit-exceeded-contents <procedure>(urlencoded-request-data-limit-exceeded-contents CONDITION) --> *</procedure> ===== urlencoded-request-data-limit-exceeded-limit <procedure>(urlencoded-request-data-limit-exceeded-limit CONDITION) --> *</procedure> ===== line-limit-exceeded-contents <procedure>(line-limit-exceeded-contents CONDITION) --> *</procedure> ===== line-limit-exceeded-limit <procedure>(line-limit-exceeded-limit CONDITION) --> *</procedure> ===== header-error-contents <procedure>(header-error-contents CONDITION) --> *</procedure> ===== header-limit-exceeded-contents <procedure>(header-limit-exceeded-contents CONDITION) --> *</procedure> ===== header-limit-exceeded-limit <procedure>(header-limit-exceeded-limit CONDITION) --> *</procedure> ===== unknown-protocol-line-line <procedure>(unknown-protocol-line-line CONDITION) --> *</procedure> ===== unknown-protocol-major <procedure>(unknown-protocol-major CONDITION) --> *</procedure> ===== unknown-protocol-minor <procedure>(unknown-protocol-minor CONDITION) --> *</procedure> ===== unknown-code-code <procedure>(unknown-code-code CONDITION) --> *</procedure> ===== unknown-status-status <procedure>(unknown-status-status CONDITION) --> *</procedure> ===== rfc1123-subparser-value? <procedure>(rfc1123-subparser-value? CONDITION) --> boolean</procedure> ===== rfc850-subparser-value? <procedure>(rfc850-subparser-value? CONDITION) --> boolean</procedure> ===== asctime-subparser-value? <procedure>(asctime-subparser-value? CONDITION) --> boolean</procedure> ===== http-date-subparser-value? <procedure>(http-date-subparser-value? CONDITION) --> boolean</procedure> ===== unencoded-header-value? <procedure>(unencoded-header-value? CONDITION) --> boolean</procedure> ===== username-with-colon-value? <procedure>(username-with-colon-value? CONDITION) --> boolean</procedure> == Bugs & Limitations * {{make-exn-condition}}, {{make-exn-condition+}}, and {{write-exn-condition}} should be combined with the "standard-conditions.scm" 'exn' predicate & accessors in own "exn-condition" module. == Notes * {{write-exn-condition}} is from {{write-exception}} of [[https://github.com/dleslie/geiser/blob/master/scheme/chicken/geiser/emacs.scm]]. == Author [[/users/kon-lovett|Kon Lovett]] == Version history ; 1.5.1 : Fix for empty call-chain. ; 1.5.0 : Add types. ; 1.4.2 : Fix #1378 ; 1.4.1 : Fix {{write-exn-condition}} call-chain header duplication. ; 1.4.0 : Add {{HEADER}} to {{write-exn-condition}} & {{write-condition}}. Add {{CHAIN-HEADER}} to {{write-exn-condition}}. Follow {{error}} form more closely. ; 1.3.0 : {{write-exn-condition}} now includes all elements of a {{composite-condition}}. Added {{write-condition}}. ; 1.2.0 : amended {{write-exn-condition}}, add doc for condition libraries. ; 1.1.1 : added {{write-exn-condition}} ; 1.1.0 : added {{make-exn-condition}} ; 1.0.4 : default exn msg ; 1.0.3 : added call-chain argument & standard conditions ; 1.0.2 : Fix for ticket #630 ; 1.0.1 : ; 1.0.0 : Hello (from "check-errors:1.11.0") == License Copyright (C) 2009-2017 Kon Lovett. All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the Software), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. 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