json: support \n

decoder_test.go

@@ -34,6 +34,16 @@ func TestDecode_interface(t *testing.T) {
 				},
 			},
 		},
+		{
+			"multiline_bad.hcl",
+			false,
+			map[string]interface{}{"foo": "bar\nbaz"},
+		},
+		{
+			"multiline.json",
+			false,
+			map[string]interface{}{"foo": "bar\nbaz"},
+		},
 		{
 			"scientific.json",
 			false,

json/lex.go

@@ -126,8 +126,16 @@ func (x *jsonLex) lexString(yylval *jsonSymType) int {
 		}
 
 		// If we're escaping a quote, then escape the quote
-		if c == '\\' && x.peek() == '"' {
-			c = x.next()
+		if c == '\\' {
+			n := x.next()
+			switch n {
+			case '"':
+				c = n
+			case 'n':
+				c = '\n'
+			default:
+				x.backup()
+			}
 		}
 
 		if _, err := b.WriteRune(c); err != nil {

test-fixtures/multiline.json

@@ -0,0 +1,3 @@
+{
+    "foo": "bar\nbaz"
+}

test-fixtures/multiline_bad.hcl

@@ -0,0 +1,2 @@
+foo = "bar
+baz"