doc/go1.13: document fmt's number syntax updates
Fixes #32815
Change-Id: Ia8ac9943a920a056ba7dbc69c1c70fa188f7aca8
Reviewed-on: https://go-review.googlesource.com/c/go/+/191578
Reviewed-by: Robert Griesemer <gri@golang.org>
diff --git a/doc/go1.13.html b/doc/go1.13.html
index 5760669..0dd2532 100644
--- a/doc/go1.13.html
+++ b/doc/go1.13.html
@@ -667,6 +667,24 @@
<dl id="fmt"><dt><a href="/pkg/fmt/">fmt</a></dt>
<dd>
+ <!-- CL 160245 -->
+ <p>
+ The printing verbs <code>%x</code> and <code>%X</code> now format floating-point and
+ complex numbers in hexadecimal notation, in lower-case and upper-case respectively.
+ </p>
+
+ <!-- CL 160246 -->
+ <p>
+ The new printing verb <code>%O</code> formats integers in base 8, emitting the <code>0o</code> prefix.
+ </p>
+
+ <!-- CL 160247 -->
+ <p>
+ The scanner now accepts hexadecimal floating-point values, digit-separating underscores
+ and leading <code>0b</code> and <code>0o</code> prefixes.
+ See the <a href="#language">Changes to the language</a> for details.
+ </p>
+
<!-- CL 176998 -->
<p>The <a href="/pkg/fmt/#Errorf"><code>Errorf</code></a> function
has a new verb, <code>%w</code>, whose operand must be an error.
diff --git a/src/fmt/scan.go b/src/fmt/scan.go
index 74ada20..0dab2c9 100644
--- a/src/fmt/scan.go
+++ b/src/fmt/scan.go
@@ -609,7 +609,7 @@
return r
}
-// scanBasePrefix reports whether the integer begins with a bas prefix
+// scanBasePrefix reports whether the integer begins with a base prefix
// and returns the base, digit string, and whether a zero was found.
// It is called only if the verb is %v.
func (s *ss) scanBasePrefix() (base int, digits string, zeroFound bool) {
