65 lines
1.5 KiB
JavaScript
65 lines
1.5 KiB
JavaScript
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/**
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* Created by Aleksey Chichenkov <a.chichenkov@initi.ru> on 1/30/19.
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*/
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var Lexer = require("./lexer.js");
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// See Allow Lexemes in ./lexer.js on top file
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/**
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* create Lexer and set string
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*
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* Here you can found next lexemes:
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* - ID
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* - EQ
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* - STRING_LITERAL
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* - AND
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* - ID
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* - GT
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* - INTEGER
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* @type {Lexer}
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*/
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var lexer = new Lexer("id == 'string' and a > 10");
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var token;
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while(token = lexer.next()){
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/**
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* token has next fields
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* - error: number, // 0 if not error
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* - lexeme: string, type of token (ID|EQ|STRING_LITERAL)
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* - value: string, value what found between <start> and <end>
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* - start: number,
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* - end: number
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*
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* and if lexeme == "OID_LITERAL"
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* - lsb - position left square bracket
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* - rsb - position right square bracket
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*/
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switch (token.error) {
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case 0:
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console.log("TOKEN:", token.lexeme, token.value);
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break;
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case -2:
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console.log("end of search");
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break;
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case -1:
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console.log("Not found any lexemes or errors or anything else");
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break;
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case 1:
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console.log("Found unknown symbol on position");
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break;
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case 2:
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console.log("Not found close quote");
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break;
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case 3:
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console.log("Unexpected symbol in oid structure");
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break;
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case 4:
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console.log("Not found close bracket for Oid");
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break;
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}
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}
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