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// Copyright 2018 The CUE Authors
//
// 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 adt
import "cuelang.org/go/cue/token"
// Op indicates the operation at the top of an expression tree of the expression
// use to evaluate a value.
type Op int
//go:generate go run golang.org/x/tools/cmd/stringer -type=Op -linecomment
// Values of Op.
const (
NoOp Op = iota
AndOp // &
OrOp // |
SelectorOp // .
IndexOp // []
SliceOp // [:]
CallOp // ()
BoolAndOp // &&
BoolOrOp // ||
EqualOp // ==
NotOp // !
NotEqualOp // !=
LessThanOp // <
LessEqualOp // <=
GreaterThanOp // >
GreaterEqualOp // >=
MatchOp // =~
NotMatchOp // !~
AddOp // +
SubtractOp // -
MultiplyOp // *
FloatQuotientOp // /
IntQuotientOp // quo
IntRemainderOp // rem
IntDivideOp // div
IntModuloOp // mod
InterpolationOp // \()
)
// OpFromToken converts a token.Token to an Op.
func OpFromToken(t token.Token) Op {
return tokenMap[t]
}
// Token returns the token.Token corresponding to the Op.
func (op Op) Token() token.Token {
return opMap[op]
}
var tokenMap = map[token.Token]Op{
token.OR: OrOp, // |
token.AND: AndOp, // &
token.ADD: AddOp, // +
token.SUB: SubtractOp, // -
token.MUL: MultiplyOp, // *
token.QUO: FloatQuotientOp, // /
token.IDIV: IntDivideOp, // div
token.IMOD: IntModuloOp, // mod
token.IQUO: IntQuotientOp, // quo
token.IREM: IntRemainderOp, // rem
token.LAND: BoolAndOp, // &&
token.LOR: BoolOrOp, // ||
token.EQL: EqualOp, // ==
token.LSS: LessThanOp, // <
token.GTR: GreaterThanOp, // >
token.NOT: NotOp, // !
token.NEQ: NotEqualOp, // !=
token.LEQ: LessEqualOp, // <=
token.GEQ: GreaterEqualOp, // >=
token.MAT: MatchOp, // =~
token.NMAT: NotMatchOp, // !~
}
var opMap = map[Op]token.Token{}
func init() {
for t, o := range tokenMap {
opMap[o] = t
}
}
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