default to read mode in filestreams

examples/stream1.cc

@@ -12,7 +12,7 @@ int main() {
     copy(iter({ 0xABCD1214, 0xBADC3264, 0xDEADBEEF, 0xBEEFDEAD }), wtest.iter<Uint32>());
     wtest.close();
 
-    FileStream rtest("test.bin", StreamMode::read);
+    FileStream rtest("test.bin");
     writefln("stream size: %d", rtest.size());
 
     for (Uint32 x: map(rtest.iter<Uint32>(), FromBigEndian<Uint32>()))

examples/stream2.cc

@@ -19,7 +19,7 @@ int main() {
     copy(smpl.iter(), wtest.iter());
     wtest.close();
 
-    FileStream test("test.txt", StreamMode::read);
+    FileStream test("test.txt");
 
     writeln("## WHOLE FILE READ ##\n");
 

ostd/io.hh

@@ -34,7 +34,7 @@ struct FileStream: Stream {
         s.p_owned = false;
     }
 
-    FileStream(ConstCharRange path, StreamMode mode): p_f() {
+    FileStream(ConstCharRange path, StreamMode mode = StreamMode::read): p_f() {
         open(path, mode);
     }
 
@@ -49,7 +49,7 @@ struct FileStream: Stream {
         return *this;
     }
 
-    bool open(ConstCharRange path, StreamMode mode) {
+    bool open(ConstCharRange path, StreamMode mode = StreamMode::read) {
         if (p_f || (path.size() > FILENAME_MAX)) return false;
         char buf[FILENAME_MAX + 1];
         memcpy(buf, &path[0], path.size());