Support typed bool, int and float in shortcode params

This means that you now can do:

    {{< vidur 9KvBeKu false true 32 3.14 >}}

And the boolean and numeric values will be converted to `bool`, `int` and `float64`.

If you want these to be  strings, they must be quoted:

    {{< vidur 9KvBeKu "false" "true" "32" "3.14" >}}

Fixes #6371

parser/pageparser/item_test.go

@@ -0,0 +1,35 @@
+// Copyright 2019 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pageparser
+
+import (
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+)
+
+func TestItemValTyped(t *testing.T) {
+	c := qt.New(t)
+
+	c.Assert(Item{Val: []byte("3.14")}.ValTyped(), qt.Equals, float64(3.14))
+	c.Assert(Item{Val: []byte(".14")}.ValTyped(), qt.Equals, float64(.14))
+	c.Assert(Item{Val: []byte("314")}.ValTyped(), qt.Equals, 314)
+	c.Assert(Item{Val: []byte("314x")}.ValTyped(), qt.Equals, "314x")
+	c.Assert(Item{Val: []byte("314 ")}.ValTyped(), qt.Equals, "314 ")
+	c.Assert(Item{Val: []byte("314"), isString: true}.ValTyped(), qt.Equals, "314")
+	c.Assert(Item{Val: []byte("true")}.ValTyped(), qt.Equals, true)
+	c.Assert(Item{Val: []byte("false")}.ValTyped(), qt.Equals, false)
+	c.Assert(Item{Val: []byte("trues")}.ValTyped(), qt.Equals, "trues")
+
+}