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package js
import "strconv"
// OpPrec is the operator precedence
type OpPrec int
// OpPrec values.
const (
OpExpr OpPrec = iota // a,b
OpAssign // a?b:c, yield x, ()=>x, async ()=>x, a=b, a+=b, ...
OpCoalesce // a??b
OpOr // a||b
OpAnd // a&&b
OpBitOr // a|b
OpBitXor // a^b
OpBitAnd // a&b
OpEquals // a==b, a!=b, a===b, a!==b
OpCompare // a<b, a>b, a<=b, a>=b, a instanceof b, a in b
OpShift // a<<b, a>>b, a>>>b
OpAdd // a+b, a-b
OpMul // a*b, a/b, a%b
OpExp // a**b
OpUnary // ++x, --x, delete x, void x, typeof x, +x, -x, ~x, !x, await x
OpUpdate // x++, x--
OpLHS // CallExpr/OptChainExpr or NewExpr
OpCall // a?.b, a(b), super(a), import(a)
OpNew // new a
OpMember // a[b], a.b, a`b`, super[x], super.x, new.target, import.meta, new a(b)
OpPrimary // literal, function, class, parenthesized
)
func (prec OpPrec) String() string {
switch prec {
case OpExpr:
return "OpExpr"
case OpAssign:
return "OpAssign"
case OpCoalesce:
return "OpCoalesce"
case OpOr:
return "OpOr"
case OpAnd:
return "OpAnd"
case OpBitOr:
return "OpBitOr"
case OpBitXor:
return "OpBitXor"
case OpBitAnd:
return "OpBitAnd"
case OpEquals:
return "OpEquals"
case OpCompare:
return "OpCompare"
case OpShift:
return "OpShift"
case OpAdd:
return "OAdd"
case OpMul:
return "OpMul"
case OpExp:
return "OpExp"
case OpUnary:
return "OpUnary"
case OpUpdate:
return "OpUpdate"
case OpLHS:
return "OpLHS"
case OpCall:
return "OpCall"
case OpNew:
return "OpNew"
case OpMember:
return "OpMember"
case OpPrimary:
return "OpPrimary"
}
return "Invalid(" + strconv.Itoa(int(prec)) + ")"
}
// Keywords is a map of reserved, strict, and other keywords
var Keywords = map[string]TokenType{
// reserved
"await": AwaitToken,
"break": BreakToken,
"case": CaseToken,
"catch": CatchToken,
"class": ClassToken,
"const": ConstToken,
"continue": ContinueToken,
"debugger": DebuggerToken,
"default": DefaultToken,
"delete": DeleteToken,
"do": DoToken,
"else": ElseToken,
"enum": EnumToken,
"export": ExportToken,
"extends": ExtendsToken,
"false": FalseToken,
"finally": FinallyToken,
"for": ForToken,
"function": FunctionToken,
"if": IfToken,
"import": ImportToken,
"in": InToken,
"instanceof": InstanceofToken,
"new": NewToken,
"null": NullToken,
"return": ReturnToken,
"super": SuperToken,
"switch": SwitchToken,
"this": ThisToken,
"throw": ThrowToken,
"true": TrueToken,
"try": TryToken,
"typeof": TypeofToken,
"var": VarToken,
"void": VoidToken,
"while": WhileToken,
"with": WithToken,
"yield": YieldToken,
// strict mode
"let": LetToken,
"static": StaticToken,
"implements": ImplementsToken,
"interface": InterfaceToken,
"package": PackageToken,
"private": PrivateToken,
"protected": ProtectedToken,
"public": PublicToken,
// extra
"as": AsToken,
"async": AsyncToken,
"from": FromToken,
"get": GetToken,
"meta": MetaToken,
"of": OfToken,
"set": SetToken,
"target": TargetToken,
}
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