update

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/open-policy-agent/opa/topdown/casts.go

@@ -0,0 +1,113 @@
+// Copyright 2018 The OPA Authors.  All rights reserved.
+// Use of this source code is governed by an Apache2
+// license that can be found in the LICENSE file.
+
+package topdown
+
+import (
+	"strconv"
+
+	"github.com/open-policy-agent/opa/ast"
+	"github.com/open-policy-agent/opa/topdown/builtins"
+)
+
+func builtinToNumber(a ast.Value) (ast.Value, error) {
+	switch a := a.(type) {
+	case ast.Null:
+		return ast.Number("0"), nil
+	case ast.Boolean:
+		if a {
+			return ast.Number("1"), nil
+		}
+		return ast.Number("0"), nil
+	case ast.Number:
+		return a, nil
+	case ast.String:
+		_, err := strconv.ParseFloat(string(a), 64)
+		if err != nil {
+			return nil, err
+		}
+		return ast.Number(a), nil
+	}
+	return nil, builtins.NewOperandTypeErr(1, a, "null", "boolean", "number", "string")
+}
+
+// Deprecated in v0.13.0.
+func builtinToArray(a ast.Value) (ast.Value, error) {
+	switch val := a.(type) {
+	case ast.Array:
+		return val, nil
+	case ast.Set:
+		arr := make(ast.Array, val.Len())
+		i := 0
+		val.Foreach(func(term *ast.Term) {
+			arr[i] = term
+			i++
+		})
+		return arr, nil
+	default:
+		return nil, builtins.NewOperandTypeErr(1, a, "array", "set")
+	}
+}
+
+// Deprecated in v0.13.0.
+func builtinToSet(a ast.Value) (ast.Value, error) {
+	switch val := a.(type) {
+	case ast.Array:
+		return ast.NewSet(val...), nil
+	case ast.Set:
+		return val, nil
+	default:
+		return nil, builtins.NewOperandTypeErr(1, a, "array", "set")
+	}
+}
+
+// Deprecated in v0.13.0.
+func builtinToString(a ast.Value) (ast.Value, error) {
+	switch val := a.(type) {
+	case ast.String:
+		return val, nil
+	default:
+		return nil, builtins.NewOperandTypeErr(1, a, "string")
+	}
+}
+
+// Deprecated in v0.13.0.
+func builtinToBoolean(a ast.Value) (ast.Value, error) {
+	switch val := a.(type) {
+	case ast.Boolean:
+		return val, nil
+	default:
+		return nil, builtins.NewOperandTypeErr(1, a, "boolean")
+	}
+}
+
+// Deprecated in v0.13.0.
+func builtinToNull(a ast.Value) (ast.Value, error) {
+	switch val := a.(type) {
+	case ast.Null:
+		return val, nil
+	default:
+		return nil, builtins.NewOperandTypeErr(1, a, "null")
+	}
+}
+
+// Deprecated in v0.13.0.
+func builtinToObject(a ast.Value) (ast.Value, error) {
+	switch val := a.(type) {
+	case ast.Object:
+		return val, nil
+	default:
+		return nil, builtins.NewOperandTypeErr(1, a, "object")
+	}
+}
+
+func init() {
+	RegisterFunctionalBuiltin1(ast.ToNumber.Name, builtinToNumber)
+	RegisterFunctionalBuiltin1(ast.CastArray.Name, builtinToArray)
+	RegisterFunctionalBuiltin1(ast.CastSet.Name, builtinToSet)
+	RegisterFunctionalBuiltin1(ast.CastString.Name, builtinToString)
+	RegisterFunctionalBuiltin1(ast.CastBoolean.Name, builtinToBoolean)
+	RegisterFunctionalBuiltin1(ast.CastNull.Name, builtinToNull)
+	RegisterFunctionalBuiltin1(ast.CastObject.Name, builtinToObject)
+}