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tokens.ts
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tokens.ts
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export namespace TokenTypes {
export const StringLiteral = "stringLiteral";
export const IntegerLiteral = "integerLiteral";
export const Identifier = "identifier";
export const EOF = "eof";
export const Unknown = "unknown";
export const And = "&&";
export const AndS = "&";
export const Or = "||";
export const OrS = "|";
export const Eq = "==";
export const Neq = "!=";
export const Not = "!";
export const Lt = "<";
export const Rt = ">";
export const LtEq = "<=";
export const RtEq = ">=";
export const Plus = "+";
export const Minus = "-";
// Reserved
export const Declare = "declare";
export const Block = "block"
export const From = "from";
export const Strip = "strip";
export const Asking = "asking";
export const Answers = "answers";
export const Named = "named";
export const Leading = "leading";
export const To = "to";
export const Because = "because";
export const Default = "default";
export const Terminate = "terminate";
export const Import = "import";
export const Strips = "strips";
export const Variables = "variables";
export const CommentStart = "--";
export const With = "with";
export const Mark = "mark";
export const Starting = "starting";
export const Lparent = "(";
export const Rparent = ")";
export const Lbrace = "{";
export const Rbrace = "}";
export const Lbrack = "[";
export const Rbrack = "]";
export const Semi = ";";
export const Comma = ",";
export const Dot = ".";
}
export class Token {
private type: string;
private value: string;
private line: number;
private column: number;
constructor(type: string, value: string, line: number, column: number) {
this.type = type;
this.value = value;
this.line = line;
this.column = column;
if (type == 'unknown') {
throw new Error('Unknown token')
}
}
public getLine(): number {
return this.line;
}
public getColumn(): number {
return this.column;
}
public getType(): string {
return this.type;
}
public getValue(): string {
return this.value;
}
}
export namespace CharUtils {
const operators = [
TokenTypes.And,
TokenTypes.Or,
TokenTypes.AndS,
TokenTypes.OrS,
TokenTypes.Eq,
TokenTypes.Neq,
TokenTypes.Lt,
TokenTypes.Rt,
TokenTypes.Plus,
TokenTypes.Minus,
TokenTypes.Dot,
TokenTypes.Not,
];
const reserved = [
TokenTypes.Terminate,
TokenTypes.Declare,
TokenTypes.Block,
TokenTypes.From,
TokenTypes.Strip,
TokenTypes.Asking,
TokenTypes.Answers,
TokenTypes.Named,
TokenTypes.Leading,
TokenTypes.To,
TokenTypes.Because,
TokenTypes.Default,
TokenTypes.Import,
TokenTypes.Strips,
TokenTypes.Variables,
TokenTypes.CommentStart,
TokenTypes.With,
TokenTypes.Mark,
TokenTypes.Starting,
];
const postfixOperators = ["+", "-"];
const compOperators = ["=", "!", "<", ">"];
const logicalOperators = ["&&", "||", '&', '|'];
const punctuationChars = [";", ","];
const arithmeticOperators = [TokenTypes.Plus, TokenTypes.Minus, TokenTypes.Dot];
export function isLetter(character: string): boolean {
return /^[a-zA-Z]$/gm.test(character);
}
export function isDigit(character: string): boolean {
return /^[0-9]$/gm.test(character);
}
export function isOperator(character: string): boolean {
return operators.indexOf(character) !== -1 ? true : false;
}
export function isComparisonOperator(character: string): boolean {
return compOperators.indexOf(character) !== -1 ? true : false;
}
export function isArithmeticOperator(character: string): boolean {
return arithmeticOperators.indexOf(character) !== -1 ? true : false;
}
export function isPostfixOperator(character: string): boolean {
return postfixOperators.indexOf(character) !== -1 ? true : false;
}
export function isLogicalOperator(character: string): boolean {
return logicalOperators.indexOf(character) !== -1 ? true : false;
}
export function isParenthesis(character: string): boolean {
return character === "(" || character === ")";
}
export function isNewLine(character: string): boolean {
return /\n/.test(character);
}
export function isWhitespaceOrNewLine(character: string): boolean {
return character === " " || character === "\t" || isNewLine(character);
}
export function isPunctuation(character: string): boolean {
return punctuationChars.indexOf(character) !== -1 ? true : false;
}
export function isIdentifierReserved(character: string): boolean {
return reserved.indexOf(character) !== -1 ? true : false;
}
export function isBrace(character: string): boolean {
return character === "{" || character === "}";
}
export function isBracket(character: string): boolean {
return character === "[" || character === "]";
}
}
// console.log(CharUtils)
// console.log(isLogicalOperator('||'));
// console.log(isOperator('||'));
// console.log(isIdentifierReserved('declare block'))