Reverted example moves.

1 files changed, 36 insertions, 0 deletions

diff --git a/misc/examples/coread.c b/misc/examples/coread.c
new file mode 100644
index 00000000..c5f85e08
--- /dev/null
+++ b/misc/examples/coread.c
@@ -0,0 +1,36 @@
+#include <stc/cstr.h>
+#include <stc/algo/coroutine.h>
+#include <errno.h>
+
+// Read file line by line using coroutines:
+
+struct file_nextline {
+    const char* filename;
+    int cco_state;
+    FILE* fp;
+    cstr line;
+};
+
+bool file_nextline(struct file_nextline* U)
+{
+    cco_begin(U)
+        U->fp = fopen(U->filename, "r");
+        U->line = cstr_init();
+
+        while (cstr_getline(&U->line, U->fp))
+            cco_yield(true);
+
+        cco_final: // required label.
+            printf("finish\n");
+            cstr_drop(&U->line);
+            fclose(U->fp);
+    cco_end(false);
+}
+
+int main(void) {
+    struct file_nextline z = {__FILE__};
+    int n = 0;
+    while (file_nextline(&z)) {
+        printf("%3d %s\n", ++n, cstr_str(&z.line));
+    }
+}