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Expected: \"${tokenType}\".`);\n }\n if(token.type != tokenType)\n {\n throw new Error(`Unexpected token type: \"${token.type}\". Expected: \"${tokenType}\".`)\n }\n \n this.lookahead = await this.getNextToken();\n return token;\n }\n \n isEndOfFile(): boolean\n {\n if(this.input == null) return true;\n return this.cursor == this.input?.length;\n }\n hasMoreTokens(): boolean\n {\n if(this.input == null) return false;\n return this.cursor < this.input?.length;\n }\n \n getCursorPosition() : number\n {\n return this.cursor;\n }\n \n async getNextToken(): Promise\n {\n if(!this.hasMoreTokens() || this.specification == null || this.input == null)\n {\n return null;\n }\n \n let input: string = this.input.substring(this.cursor);\n let startIndex : number = this.cursor;\n for(const item of this.specification)\n {\n const tokenType: string | undefined = item.key;\n const tokenValue: string | null = this.match(item, input);\n if(tokenValue == null)\n {\n continue;\n }\n if(tokenType == null)\n {\n return await this.getNextToken();\n }\n \n const token = new MagnitToken();\n token.startIndex = startIndex;\n token.type = tokenType;\n token.value = (item.resultCallback == null) ? tokenValue : await item.resultCallback(tokenValue);\n \n return token;\n }\n \n throw new Error(`Unexpected token: \"${input[0]}\".`)\n }\n private match(item: MagnitTokenizerSpecificationItem, input : string) : string | null\n {\n let match = input.match(item.regex);\n if(match == null || match.length == 0)\n {\n return null;\n }\n \n let value: string = match[0];\n this.cursor += value.length;\n \n if(item.captureGroups != null && match.groups != null)\n {\n let combinedCaptureValue: string = \"\";\n for(let i = 0; i < item.captureGroups.length; i++)\n {\n const captureGroupName: string = item.captureGroups[i];\n const capturedValue = match.groups[captureGroupName];\n if(capturedValue != null)\n {\n combinedCaptureValue += capturedValue;\n if(item.groupJoinValue !+ null && item.captureGroups.length > (i + 1))\n {\n combinedCaptureValue += item.groupJoinValue;\n }\n }\n }\n value = combinedCaptureValue;\n }\n \n return value;\n }\n }\n \n // regex is checked against string in the order that it is defined in the specification\n // whitespace first, then comments, then good matches, then a utility match to catch any \n // unknown characters.\n const defaultSpecification = [\n // Whitespace\n new MagnitTokenizerSpecificationItem(new RegExp(/^\\s+/)), // undefined/null as value; matches will be skipped.\n \n // Comments\n new MagnitTokenizerSpecificationItem(new RegExp(/^\\/\\/.*/)), // undefined/null as value; matches will be skipped.\n new MagnitTokenizerSpecificationItem(new RegExp(/^\\/\\*[\\s\\S]*?\\*\\//)), // undefined/null as value; matches will be skipped.\n \n // Variables\n new MagnitTokenizerSpecificationItem(\n new RegExp(/^\\$[^(\\/\\/)(\\/\\*)]*/), \n { \n key:\"VARIABLE\", // a unique name to use as a label for all matching items.\n resultCallback: async (result: string) => \n {\n // mutate the result to fit your needs\n let value = result;\n if(value.startsWith('$'))\n {\n value = value.substring(1);\n }\n return value;\n } \n }\n ),\n \n // Utility\n new MagnitTokenizerSpecificationItem(new RegExp(/^[\\s\\S]*/), { key:\"UNKNOWN\" }),\n ];\n\n if(specification == null)\n {\n specification = defaultSpecification;\n }\n const tokenizer = new MagnitTokenizer(specification);\n return await tokenizer.parse(value);\n}","createdAt",["D",1698082250000],"version",4,{"_117":118,"_119":120},"handle","catapart","profileImageUrl","https://secure.gravatar.com/avatar/9a63b236fbb8ba96b0fc6cb28bfc0ab5&d=identicon","fileId","2e4e1e16-26d2-11f0-a428-569c3dd06744","slug","catapart/magnitTokenize","description","actionData","errors"]