/**
 * Protocol Buffers (.proto) lexer. Tokenizes .proto source for ProtoASTBuilder.
 */
import { ProtoToken } from './ProtoTypes';
export declare class ProtoLexer {
    private input;
    private position;
    private line;
    private column;
    private tokens;
    private keywords;
    tokenize(input: string): ProtoToken[];
    private nextToken;
    private readStringLiteral;
    private readEscapeSequence;
    private readNumber;
    private readIdentifier;
    private readLineComment;
    private readBlockComment;
    private skipWhitespace;
    private advance;
    private peek;
    private isAlpha;
    private isAlphaNumeric;
    private isDigit;
    private isWhitespace;
    private createToken;
}
//# sourceMappingURL=ProtoLexer.d.ts.map