d30ff6cfae
Instead of constantly making these updates, let's just remove the year since things are stored in git anyways, and this is not an actual modern legal risk anymore.
100 lines
3.7 KiB
Go
100 lines
3.7 KiB
Go
// Mgmt
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// Copyright (C) James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// Additional permission under GNU GPL version 3 section 7
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//
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// If you modify this program, or any covered work, by linking or combining it
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// with embedded mcl code and modules (and that the embedded mcl code and
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// modules which link with this program, contain a copy of their source code in
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// the authoritative form) containing parts covered by the terms of any other
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// license, the licensors of this program grant you additional permission to
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// convey the resulting work. Furthermore, the licensors of this program grant
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// the original author, James Shubin, additional permission to update this
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// additional permission if he deems it necessary to achieve the goals of this
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// additional permission.
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package coremath
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import (
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"context"
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"fmt"
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"github.com/purpleidea/mgmt/lang/funcs/multi"
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"github.com/purpleidea/mgmt/lang/interfaces"
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"github.com/purpleidea/mgmt/lang/types"
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)
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func init() {
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typInt := types.NewType("func() int")
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typFloat := types.NewType("func() float")
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multi.ModuleRegister(ModuleName, "fortytwo", &multi.Scaffold{
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T: types.NewType("func() ?1"),
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M: multi.TypeMatch(map[string]interfaces.FuncSig{
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"func() int": fortyTwo(typInt),
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"func() float": fortyTwo(typFloat),
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}),
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//M: func(typ *types.Type) (interfaces.FuncSig, error) {
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// if typ == nil {
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// return nil, fmt.Errorf("nil type")
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// }
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// if typ.Kind != types.KindFunc {
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// return nil, fmt.Errorf("not a func")
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// }
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// if len(typ.Map) != 0 || len(typ.Ord) != 0 {
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// return nil, fmt.Errorf("arg count wrong")
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// }
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// if err := typ.Out.Cmp(types.TypeInt); err == nil {
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// return fortyTwo(typInt), nil
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// }
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// if err := typ.Out.Cmp(types.TypeFloat); err == nil {
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// return fortyTwo(typFloat), nil
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// }
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// return nil, fmt.Errorf("can't use return type of: %s", typ.Out)
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//},
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D: FortyTwo, // get the docs from this
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})
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}
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// fortyTwo is a helper function to build the correct function for the desired
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// signature, because the multi func API doesn't tell the implementing function
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// what its signature should be! In the next version of this API, we could pass
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// in a sig field, like how we demonstrate in the implementation of FortyTwo. If
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// the API doesn't change, then this is an example of how to build this as a
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// wrapper.
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func fortyTwo(sig *types.Type) interfaces.FuncSig {
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return func(ctx context.Context, input []types.Value) (types.Value, error) {
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return FortyTwo(sig, input)
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}
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}
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// FortyTwo returns 42 as either an int or a float. This is not especially
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// useful, but was built for a fun test case of a simple poly function with two
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// different return types, but no input args.
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func FortyTwo(sig *types.Type, input []types.Value) (types.Value, error) {
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if sig.Out.Kind == types.KindInt {
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return &types.IntValue{
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V: 42,
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}, nil
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}
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if sig.Out.Kind == types.KindFloat {
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return &types.FloatValue{
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V: 42.0,
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}, nil
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}
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return nil, fmt.Errorf("unknown output type: %+v", sig.Out)
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}
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