allow ints to be unmarshaled into floats

fast_test.go

@@ -7,13 +7,20 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestFastSimple(t *testing.T) {
+func TestFastSimpleInt(t *testing.T) {
 	m := map[string]int64{}
 	err := toml.Unmarshal([]byte(`a = 42`), &m)
 	require.NoError(t, err)
 	require.Equal(t, map[string]int64{"a": 42}, m)
 }
 
+func TestFastSimpleFloat(t *testing.T) {
+	m := map[string]float64{}
+	err := toml.Unmarshal([]byte("a = 42\nb = 1.1"), &m)
+	require.NoError(t, err)
+	require.Equal(t, map[string]float64{"a": 42, "b": 1.1}, m)
+}
+
 func TestFastSimpleString(t *testing.T) {
 	m := map[string]string{}
 	err := toml.Unmarshal([]byte(`a = "hello"`), &m)

internal/imported_tests/unmarshal_imported_test.go

@@ -1085,10 +1085,6 @@ func TestUnmarshalCheckConversionFloatInt(t *testing.T) {
 			desc:  "int",
 			input: `I = 1e300`,
 		},
-		{
-			desc:  "float",
-			input: `F = 9223372036854775806`,
-		},
 	}
 
 	for _, test := range testCases {

unmarshaler.go

@@ -952,6 +952,10 @@ func (d *decoder) unmarshalInteger(value *unstable.Node, v reflect.Value) error
 		}
 
 		r = reflect.ValueOf(uint(i))
+	case reflect.Float32:
+		r = reflect.ValueOf(float32(i))
+	case reflect.Float64:
+		r = reflect.ValueOf(float64(i))
 	case reflect.Interface:
 		r = reflect.ValueOf(i)
 	default: