add ?? maybe unwrapping binary operator

add null literal
fix number literal / maybe interactions

1 files changed, 21 insertions, 0 deletions

diff --git a/std/std.zig b/std/std.zig
index a53dbb6027..333896cadc 100644
--- a/std/std.zig
+++ b/std/std.zig
@@ -1,5 +1,6 @@
 use "syscall.zig";
 
+const stdin_fileno : isize = 0;
 const stdout_fileno : isize = 1;
 const stderr_fileno : isize = 2;
 
@@ -38,6 +39,26 @@ pub fn print_i64(x: i64) -> isize {
     return write(stdout_fileno, buf.ptr, len);
 }
 
+/*
+// TODO error handling
+pub fn readline(buf: []u8) -> ?[]u8 {
+    var index = 0;
+    while (index < buf.len) {
+        // TODO unknown size array indexing operator
+        const err = read(stdin_fileno, &buf.ptr[index], 1);
+        if (err != 0) {
+            return null;
+        }
+        // TODO unknown size array indexing operator
+        if (buf.ptr[index] == '\n') {
+            return buf[0...index + 1];
+        }
+        index += 1;
+    }
+    return null;
+}
+*/
+
 fn digit_to_char(digit: u64) -> u8 {
     '0' + (digit as u8)
 }