Upgrade dependent version: github.com/open-policy-agent/opa (#5315)

Upgrade dependent version: github.com/open-policy-agent/opa v0.18.0 -> v0.45.0

Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io>

Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io>

vendor/github.com/open-policy-agent/opa/ast/internal/tokens/tokens.go

@@ -0,0 +1,151 @@
+// Copyright 2020 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 tokens
+
+// Token represents a single Rego source code token
+// for use by the Parser.
+type Token int
+
+func (t Token) String() string {
+	if t < 0 || int(t) >= len(strings) {
+		return "unknown"
+	}
+	return strings[t]
+}
+
+// All tokens must be defined here
+const (
+	Illegal Token = iota
+	EOF
+	Whitespace
+	Ident
+	Comment
+
+	Package
+	Import
+	As
+	Default
+	Else
+	Not
+	Some
+	With
+	Null
+	True
+	False
+
+	Number
+	String
+
+	LBrack
+	RBrack
+	LBrace
+	RBrace
+	LParen
+	RParen
+	Comma
+	Colon
+
+	Add
+	Sub
+	Mul
+	Quo
+	Rem
+	And
+	Or
+	Unify
+	Equal
+	Assign
+	In
+	Neq
+	Gt
+	Lt
+	Gte
+	Lte
+	Dot
+	Semicolon
+
+	Every
+	Contains
+	If
+)
+
+var strings = [...]string{
+	Illegal:    "illegal",
+	EOF:        "eof",
+	Whitespace: "whitespace",
+	Comment:    "comment",
+	Ident:      "ident",
+	Package:    "package",
+	Import:     "import",
+	As:         "as",
+	Default:    "default",
+	Else:       "else",
+	Not:        "not",
+	Some:       "some",
+	With:       "with",
+	Null:       "null",
+	True:       "true",
+	False:      "false",
+	Number:     "number",
+	String:     "string",
+	LBrack:     "[",
+	RBrack:     "]",
+	LBrace:     "{",
+	RBrace:     "}",
+	LParen:     "(",
+	RParen:     ")",
+	Comma:      ",",
+	Colon:      ":",
+	Add:        "plus",
+	Sub:        "minus",
+	Mul:        "mul",
+	Quo:        "div",
+	Rem:        "rem",
+	And:        "and",
+	Or:         "or",
+	Unify:      "eq",
+	Equal:      "equal",
+	Assign:     "assign",
+	In:         "in",
+	Neq:        "neq",
+	Gt:         "gt",
+	Lt:         "lt",
+	Gte:        "gte",
+	Lte:        "lte",
+	Dot:        ".",
+	Semicolon:  ";",
+	Every:      "every",
+	Contains:   "contains",
+	If:         "if",
+}
+
+var keywords = map[string]Token{
+	"package": Package,
+	"import":  Import,
+	"as":      As,
+	"default": Default,
+	"else":    Else,
+	"not":     Not,
+	"some":    Some,
+	"with":    With,
+	"null":    Null,
+	"true":    True,
+	"false":   False,
+}
+
+// Keywords returns a copy of the default string -> Token keyword map.
+func Keywords() map[string]Token {
+	cpy := make(map[string]Token, len(keywords))
+	for k, v := range keywords {
+		cpy[k] = v
+	}
+	return cpy
+}
+
+// IsKeyword returns if a token is a keyword
+func IsKeyword(tok Token) bool {
+	_, ok := keywords[strings[tok]]
+	return ok
+}