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authorRobert de Bath <rdebath@poboxes.com>1996-03-24 17:45:55 +0100
committerLubomir Rintel <lkundrak@v3.sk>2013-10-23 23:29:43 +0200
commitfe22c37817ce338fbbc90b239320248c270957fa (patch)
treed9550410c4a20bdd382fcc58d2d3d7c5e04e5245 /unproto/example.c
parenta7aba15e8efffb1c5d3097656f1a93955a64f01f (diff)
parent42192453ea219b80d0bf9f41e51e36d3d4d0740b (diff)
downloaddev86-fe22c37817ce338fbbc90b239320248c270957fa.tar.gz
Import Dev86-0.0.4.tar.gzv0.0.4
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diff --git a/unproto/example.c b/unproto/example.c
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+ /*
+ * @(#) example.c 1.2 91/09/22 21:21:45
+ *
+ * Examples of things that can be done with the unproto package
+ */
+
+ /*
+ * New-style argument list with structured argument, one field being pointer
+ * to function returning pointer to function with function-pointer argument
+ */
+
+x(struct {
+ struct {
+ int (*(*foo) (int (*arg1) (double))) (float arg2);
+ } foo;
+} baz) {
+ return (0);
+}
+
+ /*
+ * Old-style argument list with new-style argument type, declaration
+ * embedded within block. Plus a couple assignments with function calls that
+ * look like casts.
+ */
+
+foo(bar)
+int (*(*bar) (float)) (int);
+{
+ int (*baz) (int) = (int (*) (int)) 0,
+ y = (y * (*baz) (y)),
+ *(*z) (int) = (int *(*) (int)) 0;
+
+ struct { int (*foo)(int); } *(*s)(int) =
+ (struct { int (*foo)(int); } *(*)(int)) 0;
+
+ {
+ y = (y * (*baz) (y));
+ }
+ {
+ z = (int *(*) (int)) 0;
+ }
+ {
+ s = (struct { int (*foo)(int); } *(*)(int)) 0;
+ }
+
+ return (0);
+}
+
+/* Multiple declarations in one statement */
+
+test1()
+{
+ int foo2,*(*(*bar)(int))(float),*baz(double);
+}
+
+/* Discriminate declarations from executable statements */
+
+test2(char *y)
+{
+ int foo = 5,atoi(char *);
+
+ foo = 5,atoi(y);
+}
+
+/* Declarations without explicit type */
+
+test3,test4(int);
+
+test5(int y)
+{
+ {
+ test3;
+ }
+ {
+ test4(y);
+ }
+}
+
+test6[1],test7(int);
+
+test7(int x)
+{
+ {
+ test6[1];
+ }
+ {
+ test7(x);
+ }
+}
+
+/* Checking a complicated cast */
+
+struct {
+ struct {
+ int (*f)(int), o;
+ } bar;
+} (*baz2)(int) = (struct { struct { int (*f)(int), o; } bar; } (*)(int)) 0;
+
+/* Distinguish things with the same shape but with different meaning */
+
+test8(x)
+{
+ {
+ struct {
+ int foo;
+ } bar(int);
+ }
+ {
+ do {
+ int foo;
+ } while (x);
+ }
+}
+
+/* Do not think foo(*bar) is a function pointer declaration */
+
+test9(char *bar)
+{
+ foo(*bar);
+}
+
+/* another couple of special-cased words. */
+
+test10(int x)
+{
+ {
+ int test10(int);
+ do test10(x);
+ while (x);
+ }
+ {
+ return test10(x);
+ }
+}
+
+test11(int *x)
+{
+ while (*x)
+ (putchar(*x++));
+}