private static SourceSpan GetSpan(TokenWithSpan context) {
return new SourceSpan(
new SourceLocation(
context.Start,
context.StartLine,
context.StartColumn
),
new SourceLocation(
context.End,
context.EndLine,
context.EndColumn
)
);
}
private static TokenInfo ToTokenKind(TokenWithSpan context) {
switch (context.Token) {
case JSToken.Semicolon: // ;
return new TokenInfo(
GetSpan(context),
TokenCategory.Delimiter,
TokenTriggers.None
);
case JSToken.RightCurly: // }
case JSToken.LeftCurly: // {
return new TokenInfo(
GetSpan(context),
TokenCategory.Grouping,
TokenTriggers.MatchBraces
);
case JSToken.Debugger:
case JSToken.Var:
case JSToken.If:
case JSToken.For:
case JSToken.Do:
case JSToken.While:
case JSToken.Continue:
case JSToken.Break:
case JSToken.Return:
case JSToken.With:
case JSToken.Switch:
case JSToken.Throw:
case JSToken.Try:
case JSToken.Function:
case JSToken.Else:
case JSToken.Null:
case JSToken.True:
case JSToken.False:
case JSToken.This:
case JSToken.Void:
case JSToken.TypeOf:
case JSToken.Delete:
case JSToken.Case:
case JSToken.Catch:
case JSToken.Default:
case JSToken.Finally:
case JSToken.New:
case JSToken.Class:
case JSToken.Const:
case JSToken.Enum:
case JSToken.Export:
case JSToken.Extends:
case JSToken.Import:
case JSToken.Super:
// ECMA strict reserved words
case JSToken.Implements:
case JSToken.In:
case JSToken.InstanceOf:
case JSToken.Interface:
case JSToken.Let:
case JSToken.Package:
case JSToken.Private:
case JSToken.Protected:
case JSToken.Public:
case JSToken.Static:
case JSToken.Yield:
// always okay for identifiers
case JSToken.Get:
case JSToken.Set:
return new TokenInfo(
GetSpan(context),
TokenCategory.Keyword,
TokenTriggers.None
);
// used by both statement and expression switches
// main expression switch
case JSToken.Identifier:
return new TokenInfo(
GetSpan(context),
TokenCategory.Identifier,
TokenTriggers.None
);
case JSToken.StringLiteral:
return new TokenInfo(
GetSpan(context),
TokenCategory.StringLiteral,
TokenTriggers.None
);
case JSToken.IntegerLiteral:
case JSToken.NumericLiteral:
return new TokenInfo(
GetSpan(context),
TokenCategory.NumericLiteral,
TokenTriggers.None
);
case JSToken.LeftParenthesis: // (
return new TokenInfo(
GetSpan(context),
TokenCategory.Grouping,
TokenTriggers.ParameterStart | TokenTriggers.MatchBraces
);
case JSToken.RightParenthesis: // )
return new TokenInfo(
GetSpan(context),
TokenCategory.Grouping,
TokenTriggers.ParameterEnd | TokenTriggers.MatchBraces
);
case JSToken.LeftBracket: // [
return new TokenInfo(
GetSpan(context),
TokenCategory.Grouping,
TokenTriggers.MatchBraces
);
case JSToken.RightBracket: // ]
return new TokenInfo(
GetSpan(context),
TokenCategory.Grouping,
TokenTriggers.MatchBraces
);
case JSToken.AccessField: // .
return new TokenInfo(
GetSpan(context),
TokenCategory.Operator,
TokenTriggers.MemberSelect
);
// unary ops
case JSToken.Increment: // ++
case JSToken.Decrement: // --
case JSToken.LogicalNot: // !
case JSToken.BitwiseNot: // ~
case JSToken.Plus: // +
case JSToken.Minus: // -
case JSToken.Multiply: // *
case JSToken.Divide: // /
case JSToken.Modulo: // %
case JSToken.BitwiseAnd: // &
case JSToken.BitwiseOr: // |
case JSToken.BitwiseXor: // ^
case JSToken.LeftShift: // <<
case JSToken.RightShift: // >>
case JSToken.UnsignedRightShift: // >>>
case JSToken.Equal: // ==
case JSToken.NotEqual: // !=
case JSToken.StrictEqual: // ===
case JSToken.StrictNotEqual: // !==
case JSToken.LessThan: // <
case JSToken.LessThanEqual: // <=
case JSToken.GreaterThan: // >
case JSToken.GreaterThanEqual: // >=
case JSToken.LogicalAnd: // &&
case JSToken.LogicalOr: // ||
case JSToken.Assign: // =
case JSToken.PlusAssign: // +=
case JSToken.MinusAssign: // -=
case JSToken.MultiplyAssign: // *=
case JSToken.DivideAssign: // /=
case JSToken.ModuloAssign: // %=
case JSToken.BitwiseAndAssign: // &=
case JSToken.BitwiseOrAssign: // |=
case JSToken.BitwiseXorAssign: // ^=
case JSToken.LeftShiftAssign: // <<=
case JSToken.RightShiftAssign: // >>=
case JSToken.UnsignedRightShiftAssign: // >>>=
case JSToken.ConditionalIf: // ? // MUST FOLLOW LastBinaryOp
case JSToken.Colon: // :
return new TokenInfo(
GetSpan(context),
TokenCategory.Operator,
TokenTriggers.None
);
case JSToken.Comma: // :
return new TokenInfo(
GetSpan(context),
TokenCategory.Delimiter,
TokenTriggers.ParameterNext
);
case JSToken.SingleLineComment: // for authoring
return new TokenInfo(
GetSpan(context),
TokenCategory.LineComment,
TokenTriggers.None
);
case JSToken.MultipleLineComment: // for authoring
case JSToken.UnterminatedComment: // for authoring
return new TokenInfo(
GetSpan(context),
TokenCategory.Comment,
TokenTriggers.None
);
case JSToken.RegularExpression: // only returned if the RawTokens flag is set on the scanner
return new TokenInfo(
GetSpan(context),
TokenCategory.RegularExpressionLiteral,
TokenTriggers.None
);
}
return new TokenInfo(
GetSpan(context),
TokenCategory.None,
TokenTriggers.None
);
}