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-rw-r--r--src/encoding/json/encode.go5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/encoding/json/encode.go b/src/encoding/json/encode.go
index 90782deb70..21f403e788 100644
--- a/src/encoding/json/encode.go
+++ b/src/encoding/json/encode.go
@@ -30,7 +30,10 @@ import (
// Marshal traverses the value v recursively.
// If an encountered value implements the Marshaler interface
// and is not a nil pointer, Marshal calls its MarshalJSON method
-// to produce JSON. The nil pointer exception is not strictly necessary
+// to produce JSON. If no MarshalJSON method is present but the
+// value implements encoding.TextMarshaler instead, Marshal calls
+// its MarshalText method.
+// The nil pointer exception is not strictly necessary
// but mimics a similar, necessary exception in the behavior of
// UnmarshalJSON.
//