ref: 7e1d196fa2b2496328632d515a3205004a5cefaf
parent: 9808986ecdffae601440c8278ba31c027985ab35
author: Roberto E. Vargas Caballero <k0ga@shike2.com>
date: Wed Aug 29 03:17:43 EDT 2018
Add documentation about extension in variadic macros Scc accepts variadic function alike macros with exactly the same number of parameters than the definition (excluding ...). This is an extension over C99.
--- a/README
+++ b/README
@@ -8,6 +8,7 @@
Type qualifiers make the type system ugly, and their uselessness adds
unnecessary complexity to the compiler (and increased compilation time):
+
- const: The definition of const is not clear in the standard.
If a const value is modified the behaviour is undefined
behaviour. It seems it was defined in order to be able to
@@ -27,7 +28,9 @@
In the second case, this is non-portable code by definition
(depending on the register mapped), so it is better to deal with
it using another solution (compiler extensions or direct
- assembly).
+ assembly). Since it is needed for the correct behaviour
+ of portable programs that use longjmp, this specifier eventually
+ will be implemented.
- restrict: This qualifier can only be applied to pointers to
mark that the pointed object has no other alias. This qualifier
@@ -86,3 +89,15 @@
struct foo {int i;
};
+
+- Variadic function alike macros
+ ------------------------------
+
+The standard (C99 6.10.3 c 4) forces to pass more parameters than
+the number of parameters present in the variadic argument list
+(excluding ...). Scc accepts a parameter list with the same number
+of arguments.
+
+#define P(a, ...) a
+
+P(1)