Support decoding HCL floats into Go float32

decoder.go

@@ -89,7 +89,7 @@ func (d *decoder) decode(name string, node ast.Node, result reflect.Value) error
 	switch k.Kind() {
 	case reflect.Bool:
 		return d.decodeBool(name, node, result)
-	case reflect.Float64:
+	case reflect.Float32, reflect.Float64:
 		return d.decodeFloat(name, node, result)
 	case reflect.Int, reflect.Int32, reflect.Int64:
 		return d.decodeInt(name, node, result)
@@ -143,7 +143,7 @@ func (d *decoder) decodeFloat(name string, node ast.Node, result reflect.Value)
 				return err
 			}
 
-			result.Set(reflect.ValueOf(v))
+			result.Set(reflect.ValueOf(v).Convert(result.Type()))
 			return nil
 		}
 	}

decoder_test.go

@@ -808,6 +808,36 @@ func TestDecode_intString(t *testing.T) {
 	}
 }
 
+func TestDecode_float32(t *testing.T) {
+	var value struct {
+		A float32 `hcl:"a"`
+	}
+
+	err := Decode(&value, testReadFile(t, "float.hcl"))
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if got, want := value.A, float32(1.02); got != want {
+		t.Fatalf("wrong result %#v; want %#v", got, want)
+	}
+}
+
+func TestDecode_float64(t *testing.T) {
+	var value struct {
+		A float64 `hcl:"a"`
+	}
+
+	err := Decode(&value, testReadFile(t, "float.hcl"))
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if got, want := value.A, float64(1.02); got != want {
+		t.Fatalf("wrong result %#v; want %#v", got, want)
+	}
+}
+
 func TestDecode_intStringAliased(t *testing.T) {
 	var value struct {
 		Count time.Duration