define(["exports"], function(exports) {
  "use strict";
  const bounded = (text) => `\\b${text}\\b`;
  const notBefore = (regex) => `(?!${regex})`;
  const identifierStart = "[_a-zA-Z]";
  const identifierContinue = "[_a-zA-Z0-9]";
  const identifier = bounded(`${identifierStart}${identifierContinue}*`);
  const directive = bounded(`[_a-zA-Z-0-9]+`);
  const keywords = [
    "import",
    "model",
    "scalar",
    "namespace",
    "op",
    "interface",
    "union",
    "using",
    "is",
    "extends",
    "enum",
    "alias",
    "return",
    "void",
    "if",
    "else",
    "projection",
    "dec",
    "extern",
    "fn"
  ];
  const namedLiterals = ["true", "false", "null", "unknown", "never"];
  const nonCommentWs = `[ \\t\\r\\n]`;
  const numericLiteral = `[0-9]+`;
  const conf = {
    comments: {
      lineComment: "//",
      blockComment: ["/*", "*/"]
    },
    brackets: [
      ["{", "}"],
      ["[", "]"],
      ["(", ")"]
    ],
    autoClosingPairs: [
      { open: "{", close: "}" },
      { open: "[", close: "]" },
      { open: "(", close: ")" },
      { open: '"', close: '"' },
      { open: "/**", close: " */", notIn: ["string"] }
    ],
    surroundingPairs: [
      { open: "{", close: "}" },
      { open: "[", close: "]" },
      { open: "(", close: ")" },
      { open: '"', close: '"' }
    ],
    indentationRules: {
      decreaseIndentPattern: new RegExp("^((?!.*?/\\*).*\\*/)?\\s*[\\}\\]].*$"),
      increaseIndentPattern: new RegExp(
        "^((?!//).)*(\\{([^}\"'`/]*|(\\t|[ ])*//.*)|\\([^)\"'`/]*|\\[[^\\]\"'`/]*)$"
      ),
      unIndentedLinePattern: new RegExp(
        "^(\\t|[ ])*[ ]\\*[^/]*\\*/\\s*$|^(\\t|[ ])*[ ]\\*/\\s*$|^(\\t|[ ])*[ ]\\*([ ]([^\\*]|\\*(?!/))*)?$"
      )
    }
  };
  const language = {
    defaultToken: "",
    tokenPostfix: ".tsp",
    brackets: [
      { open: "{", close: "}", token: "delimiter.curly" },
      { open: "[", close: "]", token: "delimiter.square" },
      { open: "(", close: ")", token: "delimiter.parenthesis" }
    ],
    symbols: /[=:;<>]+/,
    keywords,
    namedLiterals,
    escapes: `\\\\(u{[0-9A-Fa-f]+}|n|r|t|\\\\|"|\\\${)`,
    tokenizer: {
      root: [{ include: "@expression" }, { include: "@whitespace" }],
      stringVerbatim: [
        { regex: `(|"|"")[^"]`, action: { token: "string" } },
        { regex: `"""${notBefore(`"`)}`, action: { token: "string", next: "@pop" } }
      ],
      stringLiteral: [
        { regex: `\\\${`, action: { token: "delimiter.bracket", next: "@bracketCounting" } },
        { regex: `[^\\\\"$]+`, action: { token: "string" } },
        { regex: "@escapes", action: { token: "string.escape" } },
        { regex: `\\\\.`, action: { token: "string.escape.invalid" } },
        { regex: `"`, action: { token: "string", next: "@pop" } }
      ],
      bracketCounting: [
        { regex: `{`, action: { token: "delimiter.bracket", next: "@bracketCounting" } },
        { regex: `}`, action: { token: "delimiter.bracket", next: "@pop" } },
        { include: "@expression" }
      ],
      comment: [
        { regex: `[^\\*]+`, action: { token: "comment" } },
        { regex: `\\*\\/`, action: { token: "comment", next: "@pop" } },
        { regex: `[\\/*]`, action: { token: "comment" } }
      ],
      whitespace: [
        { regex: nonCommentWs },
        { regex: `\\/\\*`, action: { token: "comment", next: "@comment" } },
        { regex: `\\/\\/.*$`, action: { token: "comment" } }
      ],
      expression: [
        { regex: `"""`, action: { token: "string", next: "@stringVerbatim" } },
        { regex: `"${notBefore(`""`)}`, action: { token: "string", next: "@stringLiteral" } },
        { regex: numericLiteral, action: { token: "number" } },
        {
          regex: identifier,
          action: {
            cases: {
              "@keywords": { token: "keyword" },
              "@namedLiterals": { token: "keyword" },
              "@default": { token: "identifier" }
            }
          }
        },
        { regex: `@${identifier}`, action: { token: "tag" } },
        { regex: `#${directive}`, action: { token: "directive" } }
      ]
    }
  };
  exports.conf = conf;
  exports.language = language;
  Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
});
