hot code reloading examples

vlib/builtin/string.v

@@ -641,7 +641,7 @@ pub fn (s string) ustring_tmp() ustring {
 	return res
 }
 
-fn (u ustring) substr(start, end int) string {
+pub fn (u ustring) substr(start, end int) string {
 	start = u.runes[start]
 	if end >= u.runes.len {
 		end = u.s.len
@@ -652,11 +652,11 @@ fn (u ustring) substr(start, end int) string {
 	return u.s.substr(start, end)
 }
 
-fn (u ustring) left(pos int) string {
+pub fn (u ustring) left(pos int) string {
 	return u.substr(0, pos)
 }
 
-fn (u ustring) right(pos int) string {
+pub fn (u ustring) right(pos int) string {
 	return u.substr(pos, u.len)
 }
 

vlib/os/os.v

@@ -66,6 +66,7 @@ import const (
 struct C.stat {
 	st_size int
 	st_mode int
+	st_mtime int 
 }
 
 struct C.DIR {
@@ -640,6 +641,16 @@ pub fn signal(signum int, handler voidptr) {
 	C.signal(signum, handler)
 }
 
+pub fn file_last_mod_unix(path string) int {
+	attr := C.stat{} 
+	//# struct stat attr;
+	C.stat(path.str, &attr) 
+	//# stat(path.str, &attr);
+	return attr.st_mtime 
+	//# return attr.st_mtime ;
+}
+ 
+
 fn log(s string) {
 }
 

vlib/pg/pg.v

@@ -25,6 +25,7 @@ struct C.PGResult { }
 
 fn C.PQconnectdb(a byteptr) *C.PGconn
 fn C.PQerrorMessage(voidptr) byteptr 
+fn C.PQgetvalue(voidptr, int, int) byteptr
 
 pub fn connect(dbname, user string) DB {
 	conninfo := 'host=localhost user=$user dbname=$dbname'
@@ -46,7 +47,7 @@ fn res_to_rows(res voidptr) []pg.Row {
 		mut row := Row{}
 		for j := 0; j < nr_cols; j++ {
 			val := C.PQgetvalue(res, i, j) 
-			row.vals << string(val)  
+			row.vals << string(val)
 		}
 		rows << row
 	}