@neuledge/states-parser/dist/index.mjs

A parser for the Neuledge States language

var __defProp = Object.defineProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });

// src/nodes/identifier.ts
var parseIdentifierNode = /* @__PURE__ */ __name((cursor) => ({
  type: "Identifier",
  path: cursor.path,
  start: cursor.start,
  name: cursor.consume("Word", null, `identifier name`).value,
  end: cursor.end
}), "parseIdentifierNode");

// src/nodes/argument.ts
var parseMaybeArgumentNodes = /* @__PURE__ */ __name((cursor, parseValue, allowImplicit) => {
  if (!cursor.pickPunctuation("(")) {
    return [];
  }
  return parseArgumentNodes(cursor, parseValue, allowImplicit);
}, "parseMaybeArgumentNodes");
var parseArgumentNodes = /* @__PURE__ */ __name((cursor, parseValue, allowImplicit) => {
  const { index: position } = cursor;
  cursor.consumePunctuation("(");
  try {
    const args = [];
    do {
      if (cursor.maybeConsumePunctuation(")")) {
        return args;
      }
      args.push(parseArgumentNode(cursor, parseValue, allowImplicit));
    } while (cursor.maybeConsumePunctuation(","));
    cursor.consumePunctuation(")");
    return args;
  } catch (error) {
    cursor.index = position;
    throw error;
  }
}, "parseArgumentNodes");
var parseArgumentNode = /* @__PURE__ */ __name((cursor, parseValue, allowImplicit) => {
  const start = cursor.start;
  const path = cursor.path;
  const key = parseIdentifierNode(cursor);
  const explicit = allowImplicit ? cursor.maybeConsumePunctuation(":") : cursor.consumePunctuation(":");
  const value = explicit ? parseValue(cursor) : key;
  return {
    type: "Argument",
    path,
    start,
    end: cursor.end,
    key,
    value
  };
}, "parseArgumentNode");

// src/nodes/literal.ts
var LiteralValues = {
  true: true,
  false: false,
  null: null,
  NaN: NaN,
  Infinity: Infinity
};
var parseLiteralNode = /* @__PURE__ */ __name((cursor, parseValue = parseLiteralValue) => ({
  type: "Literal",
  path: cursor.path,
  start: cursor.start,
  value: parseValue(cursor),
  end: cursor.end
}), "parseLiteralNode");
var parseUInt8LiteralNode = /* @__PURE__ */ __name((cursor) => ({
  type: "Literal",
  path: cursor.path,
  start: cursor.start,
  value: parseUInt8(cursor),
  end: cursor.end
}), "parseUInt8LiteralNode");
var parseUInt8 = /* @__PURE__ */ __name((cursor) => cursor.consume("Number", ({ value }) => value > 0 && Number.isInteger(value) && value <= 255, `positive unsigned integer between 1 and 255`).value, "parseUInt8");
var parseLiteralValue = /* @__PURE__ */ __name((cursor) => {
  const token = cursor.current;
  switch (token?.type) {
    case "String":
    case "Number": {
      cursor.index += 1;
      return token.value;
    }
    case "Word": {
      const value = LiteralValues[token.value];
      if (value === void 0) {
        throw cursor.createError(`literal value`);
      }
      cursor.index += 1;
      return value;
    }
    case "Punctuation": {
      return parseLiteralPunctuationValue(cursor, token.value);
    }
    default: {
      throw cursor.createError(`literal value`);
    }
  }
}, "parseLiteralValue");
var parseLiteralPunctuationValue = /* @__PURE__ */ __name((cursor, value) => {
  switch (value) {
    case "-":
    case "+": {
      cursor.index += 1;
      const { index: position } = cursor;
      const num = parseLiteralValue(cursor);
      if (typeof num === "number") {
        return value === "-" ? -num : num;
      }
      cursor.index = position;
      throw cursor.createError(`literal number`);
    }
    case "[": {
      cursor.index += 1;
      const values = parseLiteralArrayValues(cursor);
      cursor.consumePunctuation("]");
      return values;
    }
    case "{": {
      cursor.index += 1;
      const entries = parseObjectEntries(cursor);
      cursor.consumePunctuation("}");
      return Object.fromEntries(entries);
    }
    default: {
      throw cursor.createError(`literal value`);
    }
  }
}, "parseLiteralPunctuationValue");
var parseLiteralArrayValues = /* @__PURE__ */ __name((cursor) => {
  const values = [];
  while (!cursor.pickPunctuation("]")) {
    values.push(parseLiteralValue(cursor));
    if (!cursor.maybeConsumePunctuation(",")) {
      break;
    }
  }
  return values;
}, "parseLiteralArrayValues");
var parseObjectEntries = /* @__PURE__ */ __name((cursor) => {
  const entries = [];
  while (!cursor.pickPunctuation("}")) {
    const key = (cursor.maybeConsume("String") || cursor.consume("Word", void 0, `object key`)).value;
    cursor.consumePunctuation(":");
    const value = parseLiteralValue(cursor);
    entries.push([
      key,
      value
    ]);
    if (!cursor.maybeConsumePunctuation(",")) {
      break;
    }
  }
  return entries;
}, "parseObjectEntries");

// src/nodes/decorator.ts
var parseDecoratorNodes = /* @__PURE__ */ __name((cursor) => {
  const decorators = [];
  for (let decorator; decorator = parseMaybeDecoratorNode(cursor); ) {
    decorators.push(decorator);
  }
  return decorators;
}, "parseDecoratorNodes");
var parseMaybeDecoratorNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  const path = cursor.path;
  const decoratorToken = cursor.maybeConsumePunctuation("@");
  if (!decoratorToken)
    return void 0;
  if (!decoratorToken.adjacent) {
    cursor.index -= 1;
    throw cursor.createError("decorator name");
  }
  const callee = parseIdentifierNode(cursor);
  const args = parseMaybeArgumentNodes(cursor, parseLiteralNode);
  return {
    type: "Decorator",
    path,
    start,
    end: cursor.end,
    callee,
    arguments: args
  };
}, "parseMaybeDecoratorNode");

// src/nodes/description.ts
var parseMaybeDescriptionNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  const path = cursor.path;
  const strToken = cursor.maybeConsume("String", (token) => token.kind === '"' || token.kind === '"""');
  return strToken && {
    type: "Description",
    path,
    start,
    end: cursor.end,
    value: strToken.value
  };
}, "parseMaybeDescriptionNode");

// src/nodes/either.ts
var EITHER_KEYWORD = "either";
var parseEitherNode = /* @__PURE__ */ __name((cursor, description, decorators = []) => {
  const start = cursor.start;
  cursor.consumeKeyword(EITHER_KEYWORD);
  const id = parseIdentifierNode(cursor);
  cursor.consumePunctuation("=");
  const states = parseEitherStateNodes(cursor);
  return {
    type: "Either",
    path: cursor.path,
    start,
    end: cursor.end,
    id,
    description,
    decorators,
    states
  };
}, "parseEitherNode");
var parseEitherStateNodes = /* @__PURE__ */ __name((cursor) => {
  const states = [];
  do {
    const state = parseIdentifierNode(cursor);
    states.push(state);
  } while (cursor.maybeConsumePunctuation("|"));
  return states;
}, "parseEitherStateNodes");

// src/nodes/expressions/binary.ts
var BinaryExpressionNodeOperators = {
  "+": 1,
  "-": 1,
  "*": 1,
  "/": 1,
  "%": 1,
  "**": 1,
  "==": 1,
  "!=": 1,
  "===": 1,
  "!==": 1,
  "<": 1,
  "<=": 1,
  ">": 1,
  ">=": 1
};
var isBinaryExpressionNodeOperator = /* @__PURE__ */ __name((operator) => operator in BinaryExpressionNodeOperators, "isBinaryExpressionNodeOperator");

// src/nodes/expressions/identifier.ts
var parseIdentifierExpressionNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  const value = cursor.pickKeyword("this", "null")?.value;
  switch (value) {
    case "this": {
      cursor.consumeKeyword("this");
      return {
        type: "ThisExpression",
        path: cursor.path,
        start,
        end: cursor.end,
        name: "this"
      };
    }
    case "null": {
      cursor.consumeKeyword("null");
      return {
        type: "NullLiteral",
        path: cursor.path,
        start,
        end: cursor.end,
        value: null
      };
    }
    default: {
      return parseIdentifierNode(cursor);
    }
  }
}, "parseIdentifierExpressionNode");

// src/nodes/expressions/logical.ts
var LogicalExpressionNodeOperators = {
  "&&": 1,
  "||": 1,
  "??": 1
};
var isLogicalExpressionNodeOperator = /* @__PURE__ */ __name((operator) => operator in LogicalExpressionNodeOperators, "isLogicalExpressionNodeOperator");

// src/nodes/expressions/member.ts
var parseMemberExpressionNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  let object = parseIdentifierExpressionNode(cursor);
  if (object.type === "NullLiteral") {
    throw cursor.createError(`Unexpected null literal`);
  }
  cursor.consumePunctuation(".");
  do {
    const property = parseIdentifierNode(cursor);
    object = {
      type: "MemberExpression",
      path: cursor.path,
      start,
      end: cursor.end,
      object,
      property
    };
  } while (cursor.maybeConsumePunctuation("."));
  return object;
}, "parseMemberExpressionNode");

// src/nodes/expressions/unary.ts
var UnaryExpressionNodeOperators = {
  "!": 1,
  "-": 1,
  "+": 1,
  "~": 1
};
var UnaryExpressionNodeOperatorsArray = Object.keys(UnaryExpressionNodeOperators);
var isUnaryExpressionNodeOperator = /* @__PURE__ */ __name((operator) => operator in UnaryExpressionNodeOperators, "isUnaryExpressionNodeOperator");
var parseUnaryExpressionNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  const operator = cursor.consumePunctuation(...UnaryExpressionNodeOperatorsArray).value;
  const argument = parseExpressionNode(cursor);
  return {
    type: "UnaryExpression",
    path: cursor.path,
    start,
    end: cursor.end,
    operator,
    argument
  };
}, "parseUnaryExpressionNode");

// src/nodes/expressions/expression.ts
var parseExpressionNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  const node = parseCoreExpressionNode(cursor);
  const current = cursor.current;
  if (current?.type !== "Punctuation") {
    return node;
  }
  if (isLogicalExpressionNodeOperator(current.value)) {
    cursor.consume("Punctuation");
    const right = parseExpressionNode(cursor);
    return {
      type: "LogicalExpression",
      path: cursor.path,
      start,
      end: cursor.end,
      operator: current.value,
      left: node,
      right
    };
  }
  if (isBinaryExpressionNodeOperator(current.value)) {
    cursor.consume("Punctuation");
    const right = parseExpressionNode(cursor);
    return {
      type: "BinaryExpression",
      path: cursor.path,
      start,
      end: cursor.end,
      operator: current.value,
      left: node,
      right
    };
  }
  return node;
}, "parseExpressionNode");
var parseCoreExpressionNode = /* @__PURE__ */ __name((cursor) => {
  const { current, next } = cursor;
  if (current?.type === "Punctuation") {
    if (current.value === "(") {
      cursor.consumePunctuation("(");
      const node = parseExpressionNode(cursor);
      cursor.consumePunctuation(")");
      return node;
    }
    if (isUnaryExpressionNodeOperator(current.value)) {
      return parseUnaryExpressionNode(cursor);
    }
    return parseLiteralNode(cursor);
  }
  if (current?.type !== "Word") {
    return parseLiteralNode(cursor);
  }
  switch (next?.value) {
    case "(": {
      return parseCallExpressionNode(cursor);
    }
    case ".": {
      return parseMemberExpressionNode(cursor);
    }
    default: {
      return parseIdentifierExpressionNode(cursor);
    }
  }
}, "parseCoreExpressionNode");

// src/nodes/expressions/call.ts
var parseCallExpressionNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  const callee = parseIdentifierNode(cursor);
  const args = parseArgumentNodes(cursor, parseExpressionNode, true);
  return {
    type: "CallExpression",
    path: cursor.path,
    start,
    end: cursor.end,
    callee,
    arguments: args
  };
}, "parseCallExpressionNode");

// src/nodes/type.ts
var parseTypeNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  const path = cursor.path;
  const identifier = parseIdentifierNode(cursor);
  const args = parseMaybeArgumentNodes(cursor, parseLiteralNode);
  if (args.length) {
    return {
      type: "TypeGenerator",
      path,
      start,
      end: cursor.end,
      identifier,
      arguments: args
    };
  }
  const list = !!cursor.maybeConsumePunctuation("[");
  if (list) {
    cursor.consumePunctuation("]");
  }
  return {
    type: "TypeExpression",
    path,
    start,
    end: cursor.end,
    identifier,
    list
  };
}, "parseTypeNode");

// src/nodes/parameter.ts
var parseParameterNodes = /* @__PURE__ */ __name((cursor) => {
  const parameters = [];
  cursor.consumePunctuation("(");
  while (!cursor.maybeConsumePunctuation(")")) {
    const parameter = parseParameterNode(cursor);
    parameters.push(parameter);
    cursor.maybeConsumePunctuation(",");
  }
  return parameters;
}, "parseParameterNodes");
var parseParameterNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  const description = parseMaybeDescriptionNode(cursor);
  const decorators = parseDecoratorNodes(cursor);
  const key = parseIdentifierNode(cursor);
  const nullable = !!cursor.maybeConsumePunctuation("?");
  cursor.consumePunctuation(":");
  const as = parseTypeNode(cursor);
  return {
    type: "Parameter",
    path: cursor.path,
    start,
    end: cursor.end,
    key,
    as,
    nullable,
    description,
    decorators
  };
}, "parseParameterNode");

// src/nodes/property.ts
var parseReturnBodyNodes = /* @__PURE__ */ __name((cursor) => {
  const body = [];
  cursor.consumePunctuation("{");
  do {
    if (cursor.maybeConsumePunctuation("}")) {
      return body;
    }
    body.push(parseReturnBodyNode(cursor));
  } while (cursor.maybeConsumePunctuation(","));
  cursor.consumePunctuation("}");
  return body;
}, "parseReturnBodyNodes");
var parseReturnBodyNode = /* @__PURE__ */ __name((cursor) => {
  const start = cursor.start;
  const key = parseIdentifierNode(cursor);
  const explicit = cursor.maybeConsumePunctuation(":");
  const value = explicit ? parseExpressionNode(cursor) : key;
  return {
    type: "Property",
    path: cursor.path,
    start,
    end: cursor.end,
    key,
    value
  };
}, "parseReturnBodyNode");

// src/nodes/mutation.ts
var parseMutationNode = /* @__PURE__ */ __name((cursor, description, decorators = []) => {
  const start = cursor.start;
  const firstId = parseIdentifierNode(cursor);
  const secondId = cursor.maybeConsumePunctuation(".") ? parseIdentifierNode(cursor) : void 0;
  const parameters = parseParameterNodes(cursor);
  cursor.consumePunctuation(":");
  const returns = parseIdentifierNode(cursor);
  const hasBody = cursor.maybeConsumePunctuation("=>");
  const body = hasBody ? parseReturnBodyNodes(cursor) : [];
  return {
    type: "Mutation",
    path: cursor.path,
    start,
    end: cursor.end,
    key: secondId || firstId,
    description,
    decorators,
    from: secondId ? firstId : void 0,
    parameters,
    returns,
    body
  };
}, "parseMutationNode");

// src/error.ts
var ParsingError = class _ParsingError extends SyntaxError {
  static {
    __name(this, "ParsingError");
  }
  name = "ParsingError";
  start;
  end;
  path;
  constructor(position, message) {
    super(message);
    Object.setPrototypeOf(this, _ParsingError.prototype);
    this.start = position.start;
    this.end = position.end;
    this.path = position.path;
    this.stack = `${this.name}: ${this.message}\r
	at ${this.path ?? `character ${this.start}`}`;
  }
};

// src/nodes/state-field.ts
var STATE_FIELD_INDEX_MAX_INPUT_VALUE = 255;
var parseStateFieldNodes = /* @__PURE__ */ __name((cursor, hasParent) => {
  const fieldMap = {};
  const indexMap = {};
  cursor.consumePunctuation("{");
  while (!cursor.maybeConsumePunctuation("}")) {
    const field = parseStateFieldNode(cursor);
    if (fieldMap[field.key.name]) {
      throw new ParsingError(field.key, `Duplicate field name '${field.key.name}'`);
    }
    if (!hasParent && field.type === "ExcludedField") {
      throw new ParsingError(field, `Unexpected excluded field on state without a parent state`);
    }
    if ("index" in field) {
      if (indexMap[field.index.value]) {
        throw new ParsingError(field.index, `Duplicate index for field name '${indexMap[field.index.value].key.name}'`);
      }
      indexMap[field.index.value] = field;
    }
    fieldMap[field.key.name] = field;
    cursor.maybeConsumePunctuation(",");
  }
  return Object.values(fieldMap);
}, "parseStateFieldNodes");
var parseStateFieldNode = /* @__PURE__ */ __name((cursor) => {
  const description = parseMaybeDescriptionNode(cursor);
  const decorators = parseDecoratorNodes(cursor);
  const maybeRef = !description && !decorators.length;
  const start = cursor.start;
  const path = cursor.path;
  const substractSign = maybeRef ? cursor.maybeConsumePunctuation("-") : void 0;
  const firstId = parseIdentifierNode(cursor);
  if (substractSign) {
    return {
      type: "ExcludedField",
      key: firstId,
      path,
      start,
      end: cursor.end
    };
  }
  const dotSign = maybeRef ? cursor.maybeConsumePunctuation(".") : void 0;
  if (!dotSign) {
    return parseFieldNode(cursor, {
      path,
      start,
      key: firstId,
      description,
      decorators
    });
  }
  const secId = parseIdentifierNode(cursor);
  return parseReferenceFieldNode(cursor, {
    path,
    start,
    state: firstId,
    key: secId
  });
}, "parseStateFieldNode");
var parseFieldNode = /* @__PURE__ */ __name((cursor, base) => {
  const nullSign = cursor.maybeConsumePunctuation("?");
  cursor.maybeConsumePunctuation(":");
  const as = parseTypeNode(cursor);
  const index = parseIndex(cursor);
  return {
    type: "Field",
    ...base,
    end: cursor.end,
    as,
    index,
    nullable: !!nullSign
  };
}, "parseFieldNode");
var parseReferenceFieldNode = /* @__PURE__ */ __name((cursor, base) => {
  const index = parseIndex(cursor);
  return {
    type: "ReferenceField",
    ...base,
    end: cursor.end,
    index
  };
}, "parseReferenceFieldNode");
var parseIndex = /* @__PURE__ */ __name((cursor) => {
  cursor.consumePunctuation("=");
  return parseUInt8LiteralNode(cursor);
}, "parseIndex");

// src/nodes/state.ts
var STATE_KEYWORD = "state";
var parseStateNode = /* @__PURE__ */ __name((cursor, description, decorators = []) => {
  const start = cursor.start;
  cursor.consumeKeyword(STATE_KEYWORD);
  const id = parseIdentifierNode(cursor);
  const fromKeyword = cursor.maybeConsumeKeyword("from");
  let from;
  if (fromKeyword) {
    from = parseIdentifierNode(cursor);
  }
  const fields = parseStateFieldNodes(cursor, !!from);
  return {
    type: "State",
    path: cursor.path,
    start,
    end: cursor.end,
    id,
    description,
    from,
    fields,
    decorators
  };
}, "parseStateNode");

// src/nodes/document.ts
var parseDocumentNode = /* @__PURE__ */ __name((cursor) => ({
  type: "Root",
  path: cursor.path,
  start: cursor.start,
  body: parseDocumentBodyNodes(cursor),
  end: cursor.end
}), "parseDocumentNode");
var parseDocumentBodyNodes = /* @__PURE__ */ __name((cursor) => {
  const body = [];
  while (cursor.current) {
    const description = parseMaybeDescriptionNode(cursor);
    const decorators = parseDecoratorNodes(cursor);
    const keyword = cursor.pickKeyword();
    const nodeKeyword = keyword && cursor.next?.type === "Word" ? keyword.value : null;
    let node;
    switch (nodeKeyword) {
      case STATE_KEYWORD: {
        node = parseStateNode(cursor, description, decorators);
        break;
      }
      case EITHER_KEYWORD: {
        node = parseEitherNode(cursor, description, decorators);
        break;
      }
      default: {
        if (!keyword) {
          throw cursor.createError();
        }
        node = parseMutationNode(cursor, description, decorators);
      }
    }
    body.push(node);
  }
  return body;
}, "parseDocumentBodyNodes");

// src/tokens/tokenize.ts
var TokenCharMap = {
  '"': "String",
  "'": "String",
  "": -1,
  " ": -1,
  "	": -1,
  "\r": -1,
  "\n": -1
};
for (const char of "$_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ") {
  TokenCharMap[char] = "Word";
}
for (const char of "0123456789") {
  TokenCharMap[char] = "Number";
}
var tokenize = /* @__PURE__ */ __name((content, path) => {
  const values = splitTokenValues(content);
  const tokens = [];
  let position = 0;
  let line = 1;
  let column = 1;
  let isComment = false;
  let lastPunctuation = null;
  for (const value of values) {
    if (!isComment) {
      const token = parseToken(value, position, path && `${path}:${line}:${column}`);
      if (token) {
        if (lastPunctuation) {
          lastPunctuation.adjacent = true;
        }
        tokens.push(token);
        lastPunctuation = token.type === "Punctuation" ? token : null;
      } else {
        lastPunctuation = null;
        if (value === "#")
          isComment = true;
      }
    }
    const lines = value.split(/\r*\n/g);
    if (lines.length > 1) {
      line += lines.length - 1;
      column = 1;
    }
    column += lines.at(-1)?.length ?? 0;
    position += value.length;
    if (isComment && value.includes("\n")) {
      isComment = false;
    }
  }
  return tokens;
}, "tokenize");
var splitTokenValues = /* @__PURE__ */ __name((content) => content.match(/([$_a-z]\w*|(?:\d*\.\d+|\d+)|\s+|"""(?:[^"]+|"[^"]|""[^"])*"""|"(?:[^\n"\\]+|\\.)*"|'(?:[^\n'\\]+|\\.)*'|[<=>]=|=>|[!=]==|&&|!!|\|\||\?\?|\*\*|\.\.\.|.)/gi) || [], "splitTokenValues");
var parseToken = /* @__PURE__ */ __name((value, position, path) => {
  const kind = value[0];
  const type = TokenCharMap[kind] || "Punctuation";
  const start = position;
  const end = position + value.length;
  switch (type) {
    case "Number": {
      return {
        type,
        path,
        start,
        end,
        value: Number(value)
      };
    }
    case "String": {
      return {
        type,
        start,
        end,
        ...parseStringToken(kind, value)
      };
    }
    case "Punctuation": {
      if (value.length > 1 && /^[+-]?(?:\d*\.\d+|\d+)$/.test(value)) {
        return {
          type: "Number",
          path,
          start,
          end,
          value: Number(value)
        };
      }
      if (value === "#") {
        return null;
      }
      return {
        type,
        path,
        start,
        end,
        value,
        adjacent: false
      };
    }
    case "Word": {
      return {
        type,
        path,
        start,
        end,
        value
      };
    }
    case -1: {
      return null;
    }
  }
}, "parseToken");
var parseStringToken = /* @__PURE__ */ __name((kind, raw) => {
  if (kind === '"' && raw[1] === '"' && raw[2] === '"') {
    return {
      kind: '"""',
      value: raw.slice(3, -3).trim().replaceAll(/[\t ]*\r?\n[\t ]*/g, "\n")
    };
  }
  return {
    kind,
    value: raw.slice(1, -1).replaceAll(/\\(.)/g, "$1")
  };
}, "parseStringToken");

// src/tokens/cursor.ts
var TokenCursor = class _TokenCursor {
  static {
    __name(this, "TokenCursor");
  }
  content;
  index;
  tokens;
  constructor(content, path, index = 0) {
    this.content = content;
    this.index = index;
    this.tokens = tokenize(content, path);
  }
  get current() {
    return this.tokens[this.index];
  }
  get next() {
    return this.tokens[this.index + 1];
  }
  get path() {
    return this.tokens[this.index]?.path;
  }
  get start() {
    return this.tokens[this.index]?.start ?? this.content.length;
  }
  get end() {
    return this.tokens[this.index - 1]?.end ?? 0;
  }
  static isMatch(token, type, test) {
    if (token?.type !== type) {
      return false;
    }
    if (test == null) {
      return true;
    }
    try {
      return test(token);
    } catch {
      return false;
    }
  }
  pickKeyword(...values) {
    return this.pick("Word", values.length ? (token) => values.includes(token.value) : void 0);
  }
  consumeKeyword(...values) {
    return this.consume("Word", (token) => values.includes(token.value), `'${values[0]}' keyword`);
  }
  pickPunctuation(...values) {
    return this.pick("Punctuation", (token) => values.includes(token.value));
  }
  consumePunctuation(...values) {
    return this.consume("Punctuation", (token) => values.includes(token.value), `'${values[0]}' token`);
  }
  pick(type, test) {
    const token = this.current;
    if (!_TokenCursor.isMatch(token, type, test)) {
      return null;
    }
    return token;
  }
  consume(type, test, expected) {
    const token = this.pick(type, test);
    if (!token) {
      throw this.createError(expected);
    }
    this.index += 1;
    return token;
  }
  createError(expected) {
    const token = this.current ?? null;
    return new ParsingError(token ?? {
      start: this.content.length - 1,
      end: this.content.length
    }, expected ? `Expect ${expected}` : token ? `Unexpected token '${this.content.slice(token.start, token.end)}'` : `Unexpected EOF`);
  }
  maybeConsumeKeyword(value) {
    const token = this.current;
    if (!token || token.value !== value || token.type !== "Word") {
      return void 0;
    }
    this.index += 1;
    return token;
  }
  maybeConsumePunctuation(value) {
    const token = this.current;
    if (!token || token.value !== value || token.type !== "Punctuation") {
      return void 0;
    }
    this.index += 1;
    return token;
  }
  maybeConsume(type, test) {
    const token = this.current;
    if (!_TokenCursor.isMatch(token, type, test)) {
      return void 0;
    }
    this.index += 1;
    return token;
  }
  transaction(fn) {
    const { index: position } = this;
    try {
      return fn();
    } catch (error) {
      this.index = position;
      throw error;
    }
  }
};

// src/parser.ts
var parseStates = /* @__PURE__ */ __name((source, filepath) => {
  const cursor = new TokenCursor(source, filepath);
  return parseDocumentNode(cursor);
}, "parseStates");
export {
  EITHER_KEYWORD,
  ParsingError,
  STATE_FIELD_INDEX_MAX_INPUT_VALUE,
  STATE_KEYWORD,
  TokenCursor,
  isBinaryExpressionNodeOperator,
  isLogicalExpressionNodeOperator,
  isUnaryExpressionNodeOperator,
  parseArgumentNodes,
  parseCallExpressionNode,
  parseDecoratorNodes,
  parseDocumentNode,
  parseEitherNode,
  parseExpressionNode,
  parseIdentifierExpressionNode,
  parseIdentifierNode,
  parseLiteralNode,
  parseMaybeArgumentNodes,
  parseMaybeDescriptionNode,
  parseMemberExpressionNode,
  parseMutationNode,
  parseParameterNodes,
  parseReturnBodyNodes,
  parseStateFieldNodes,
  parseStateNode,
  parseStates,
  parseTypeNode,
  parseUInt8LiteralNode,
  parseUnaryExpressionNode
};
//# sourceMappingURL=index.mjs.map