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-rw-r--r--src/fmt/doc.go3
-rw-r--r--src/fmt/print.go8
2 files changed, 6 insertions, 5 deletions
diff --git a/src/fmt/doc.go b/src/fmt/doc.go
index a7115809d3..d05ee519c3 100644
--- a/src/fmt/doc.go
+++ b/src/fmt/doc.go
@@ -150,7 +150,8 @@
concrete value that it holds, and printing continues with the next rule.
2. If an operand implements the Formatter interface, it will
- be invoked. Formatter provides fine control of formatting.
+ be invoked. In this case the interpretation of verbs and flags is
+ controlled by that implementation.
3. If the %v verb is used with the # flag (%#v) and the operand
implements the GoStringer interface, that will be invoked.
diff --git a/src/fmt/print.go b/src/fmt/print.go
index 778b5b0938..8bc225f548 100644
--- a/src/fmt/print.go
+++ b/src/fmt/print.go
@@ -47,11 +47,11 @@ type State interface {
Flag(c int) bool
}
-// Formatter is the interface implemented by values with a custom formatter.
-// The implementation of Format may call Sprint(f) or Fprint(f) etc.
-// to generate its output.
+// Formatter is implemented by any value that has a Format method.
+// The implementation controls how State and rune are interpreted,
+// and may call Sprint(f) or Fprint(f) etc. to generate its output.
type Formatter interface {
- Format(f State, c rune)
+ Format(f State, verb rune)
}
// Stringer is implemented by any value that has a String method,