~ chicken-core (chicken-5) 667cfabd4d3b91db9f2a928c4fda393fea0577f8

commit 667cfabd4d3b91db9f2a928c4fda393fea0577f8
Author:     Peter Bex <peter@more-magic.net>
AuthorDate: Thu May 23 21:05:37 2019 +0200
Commit:     Peter Bex <peter@more-magic.net>
CommitDate: Thu May 23 21:05:37 2019 +0200

    Re-add docs for cond-expand
    
    This got lost because it doesn't live in any particular module.

diff --git a/manual/Extensions to the standard b/manual/Extensions to the standard
index b439997b..66ef6c64 100644
--- a/manual/Extensions to the standard	
+++ b/manual/Extensions to the standard	
@@ -18,7 +18,31 @@ extensions is provided.
 === Non-standard procedures and syntax
 
 CHICKEN provides numerous non-standard procedures. See the manual
-sections on the included library modules ([[Included modules]]) for more information.
+sections on the included library modules ([[Included modules]]) for
+more information.  Here we only document {{cond-expand}} because it is
+always present in a module, even without imports.
+
+==== cond-expand
+
+<macro>(cond-expand FEATURE-CLAUSE ...)</macro>
+
+Expands by selecting feature clauses. This form is allowed to appear in non-toplevel expressions.
+
+Predefined feature-identifiers are "situation" specific:
+
+; compile : {{chicken}}, {{compiling}}, {{library}}, {{eval}}, {{extras}}, {{regex}}, {{srfi-0}}, {{srfi-2}}, {{srfi-4}}, {{srfi-6}}, {{srfi-8}}, {{srfi-9}}, {{srfi-10}}, {{srfi-11}}, {{srfi-12}}, {{srfi-15}}, {{srfi-16}}, {{srfi-17}}, {{srfi-23}}, {{srfi-26}}, {{srfi-28}}, {{srfi-30}}, {{srfi-31}}, {{srfi-39}}, {{srfi-55}}, {{srfi-61}}, {{srfi-62}}
+
+; load : {{chicken}}, {{extras}}, {{srfi-0}}, {{srfi-2}}, {{srfi-6}}, {{srfi-8}}, {{srfi-9}}, {{srfi-10}}, {{srfi-12}}, {{srfi-17}}, {{srfi-23}}, {{srfi-28}}, {{srfi-30}}, {{srfi-39}}, {{srfi-55}}, {{srfi-61}}, {{srfi-62}}. {{library}} is implicit.
+
+; eval : {{csi}}, {{chicken}}, {{extras}}, {{srfi-0}}, {{srfi-2}}, {{srfi-6}}, {{srfi-8}}, {{srfi-9}}, {{srfi-10}}, {{srfi-11}}, {{srfi-12}}, {{srfi-15}}, {{srfi-16}}, {{srfi-17}}, {{srfi-23}}, {{srfi-26}}, {{srfi-28}}, {{srfi-30}}, {{srfi-31}}, {{srfi-39}}, {{srfi-55}}, {{srfi-61}}, {{srfi-62}}. {{library}} is implicit.
+
+The following feature-identifier classes are available in all situations: {{(machine-byte-order)}}, {{(machine-type)}}, {{(software-type)}}, {{(software-version)}}, where the actual feature-identifier is platform dependent.
+
+In addition the following feature-identifiers may exist: {{cross-chicken}}, {{dload}}, {{manyargs}}, {{ptables}}.
+
+For further information, see the documentation for
+[[http://srfi.schemers.org/srfi-0/srfi-0.html|SRFI-0]].
+
 
 === User defined character names