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							348 lines
						
					
					
						
							7.7 KiB
						
					
					
				
			
		
		
	
	
							348 lines
						
					
					
						
							7.7 KiB
						
					
					
				"use strict";
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Object.defineProperty(exports, "__esModule", {
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  value: true
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});
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exports.readCodePoint = readCodePoint;
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exports.readInt = readInt;
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exports.readStringContents = readStringContents;
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var _isDigit = function isDigit(code) {
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  return code >= 48 && code <= 57;
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};
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const forbiddenNumericSeparatorSiblings = {
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  decBinOct: new Set([46, 66, 69, 79, 95, 98, 101, 111]),
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  hex: new Set([46, 88, 95, 120])
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};
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const isAllowedNumericSeparatorSibling = {
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  bin: ch => ch === 48 || ch === 49,
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  oct: ch => ch >= 48 && ch <= 55,
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  dec: ch => ch >= 48 && ch <= 57,
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  hex: ch => ch >= 48 && ch <= 57 || ch >= 65 && ch <= 70 || ch >= 97 && ch <= 102
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};
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function readStringContents(type, input, pos, lineStart, curLine, errors) {
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  const initialPos = pos;
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  const initialLineStart = lineStart;
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  const initialCurLine = curLine;
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  let out = "";
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  let firstInvalidLoc = null;
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  let chunkStart = pos;
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  const {
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    length
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  } = input;
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  for (;;) {
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    if (pos >= length) {
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      errors.unterminated(initialPos, initialLineStart, initialCurLine);
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      out += input.slice(chunkStart, pos);
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      break;
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    }
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    const ch = input.charCodeAt(pos);
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    if (isStringEnd(type, ch, input, pos)) {
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      out += input.slice(chunkStart, pos);
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      break;
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    }
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    if (ch === 92) {
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      out += input.slice(chunkStart, pos);
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      const res = readEscapedChar(input, pos, lineStart, curLine, type === "template", errors);
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      if (res.ch === null && !firstInvalidLoc) {
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        firstInvalidLoc = {
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          pos,
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          lineStart,
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          curLine
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        };
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      } else {
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        out += res.ch;
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      }
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      ({
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        pos,
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        lineStart,
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        curLine
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      } = res);
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      chunkStart = pos;
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    } else if (ch === 8232 || ch === 8233) {
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      ++pos;
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      ++curLine;
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      lineStart = pos;
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    } else if (ch === 10 || ch === 13) {
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      if (type === "template") {
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        out += input.slice(chunkStart, pos) + "\n";
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        ++pos;
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        if (ch === 13 && input.charCodeAt(pos) === 10) {
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          ++pos;
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        }
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        ++curLine;
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        chunkStart = lineStart = pos;
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      } else {
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        errors.unterminated(initialPos, initialLineStart, initialCurLine);
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      }
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    } else {
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      ++pos;
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    }
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  }
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  return {
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    pos,
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    str: out,
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    firstInvalidLoc,
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    lineStart,
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    curLine,
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    containsInvalid: !!firstInvalidLoc
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  };
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}
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function isStringEnd(type, ch, input, pos) {
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  if (type === "template") {
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    return ch === 96 || ch === 36 && input.charCodeAt(pos + 1) === 123;
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  }
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  return ch === (type === "double" ? 34 : 39);
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}
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function readEscapedChar(input, pos, lineStart, curLine, inTemplate, errors) {
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  const throwOnInvalid = !inTemplate;
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  pos++;
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  const res = ch => ({
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    pos,
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    ch,
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    lineStart,
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    curLine
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  });
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  const ch = input.charCodeAt(pos++);
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  switch (ch) {
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    case 110:
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      return res("\n");
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    case 114:
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      return res("\r");
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    case 120:
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      {
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        let code;
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        ({
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          code,
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          pos
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        } = readHexChar(input, pos, lineStart, curLine, 2, false, throwOnInvalid, errors));
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        return res(code === null ? null : String.fromCharCode(code));
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      }
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    case 117:
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      {
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        let code;
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        ({
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          code,
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          pos
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        } = readCodePoint(input, pos, lineStart, curLine, throwOnInvalid, errors));
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        return res(code === null ? null : String.fromCodePoint(code));
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      }
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    case 116:
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      return res("\t");
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    case 98:
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      return res("\b");
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    case 118:
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      return res("\u000b");
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    case 102:
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      return res("\f");
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    case 13:
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      if (input.charCodeAt(pos) === 10) {
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        ++pos;
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      }
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    case 10:
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      lineStart = pos;
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      ++curLine;
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    case 8232:
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    case 8233:
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      return res("");
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    case 56:
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    case 57:
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      if (inTemplate) {
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        return res(null);
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      } else {
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        errors.strictNumericEscape(pos - 1, lineStart, curLine);
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      }
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    default:
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      if (ch >= 48 && ch <= 55) {
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        const startPos = pos - 1;
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        const match = input.slice(startPos, pos + 2).match(/^[0-7]+/);
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        let octalStr = match[0];
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        let octal = parseInt(octalStr, 8);
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        if (octal > 255) {
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          octalStr = octalStr.slice(0, -1);
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          octal = parseInt(octalStr, 8);
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        }
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        pos += octalStr.length - 1;
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        const next = input.charCodeAt(pos);
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        if (octalStr !== "0" || next === 56 || next === 57) {
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          if (inTemplate) {
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            return res(null);
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          } else {
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            errors.strictNumericEscape(startPos, lineStart, curLine);
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          }
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        }
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        return res(String.fromCharCode(octal));
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      }
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      return res(String.fromCharCode(ch));
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  }
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}
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function readHexChar(input, pos, lineStart, curLine, len, forceLen, throwOnInvalid, errors) {
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  const initialPos = pos;
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  let n;
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  ({
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    n,
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    pos
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  } = readInt(input, pos, lineStart, curLine, 16, len, forceLen, false, errors, !throwOnInvalid));
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  if (n === null) {
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    if (throwOnInvalid) {
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      errors.invalidEscapeSequence(initialPos, lineStart, curLine);
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    } else {
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      pos = initialPos - 1;
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    }
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  }
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  return {
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    code: n,
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    pos
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  };
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}
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function readInt(input, pos, lineStart, curLine, radix, len, forceLen, allowNumSeparator, errors, bailOnError) {
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  const start = pos;
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  const forbiddenSiblings = radix === 16 ? forbiddenNumericSeparatorSiblings.hex : forbiddenNumericSeparatorSiblings.decBinOct;
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  const isAllowedSibling = radix === 16 ? isAllowedNumericSeparatorSibling.hex : radix === 10 ? isAllowedNumericSeparatorSibling.dec : radix === 8 ? isAllowedNumericSeparatorSibling.oct : isAllowedNumericSeparatorSibling.bin;
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  let invalid = false;
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  let total = 0;
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  for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) {
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    const code = input.charCodeAt(pos);
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    let val;
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    if (code === 95 && allowNumSeparator !== "bail") {
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      const prev = input.charCodeAt(pos - 1);
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      const next = input.charCodeAt(pos + 1);
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      if (!allowNumSeparator) {
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        if (bailOnError) return {
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          n: null,
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          pos
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        };
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        errors.numericSeparatorInEscapeSequence(pos, lineStart, curLine);
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      } else if (Number.isNaN(next) || !isAllowedSibling(next) || forbiddenSiblings.has(prev) || forbiddenSiblings.has(next)) {
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        if (bailOnError) return {
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          n: null,
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          pos
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        };
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        errors.unexpectedNumericSeparator(pos, lineStart, curLine);
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      }
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      ++pos;
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      continue;
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    }
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    if (code >= 97) {
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      val = code - 97 + 10;
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    } else if (code >= 65) {
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      val = code - 65 + 10;
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    } else if (_isDigit(code)) {
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      val = code - 48;
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    } else {
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      val = Infinity;
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    }
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    if (val >= radix) {
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      if (val <= 9 && bailOnError) {
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        return {
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          n: null,
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          pos
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        };
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      } else if (val <= 9 && errors.invalidDigit(pos, lineStart, curLine, radix)) {
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        val = 0;
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      } else if (forceLen) {
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        val = 0;
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        invalid = true;
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      } else {
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        break;
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      }
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    }
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    ++pos;
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    total = total * radix + val;
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  }
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  if (pos === start || len != null && pos - start !== len || invalid) {
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    return {
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      n: null,
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      pos
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    };
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  }
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  return {
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    n: total,
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    pos
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  };
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}
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function readCodePoint(input, pos, lineStart, curLine, throwOnInvalid, errors) {
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  const ch = input.charCodeAt(pos);
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  let code;
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  if (ch === 123) {
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    ++pos;
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    ({
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      code,
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      pos
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    } = readHexChar(input, pos, lineStart, curLine, input.indexOf("}", pos) - pos, true, throwOnInvalid, errors));
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    ++pos;
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    if (code !== null && code > 0x10ffff) {
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      if (throwOnInvalid) {
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        errors.invalidCodePoint(pos, lineStart, curLine);
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      } else {
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        return {
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          code: null,
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          pos
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        };
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      }
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    }
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  } else {
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    ({
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      code,
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      pos
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    } = readHexChar(input, pos, lineStart, curLine, 4, false, throwOnInvalid, errors));
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  }
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  return {
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    code,
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    pos
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  };
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}
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//# sourceMappingURL=index.js.map
 |