Method parseFunction

static/katex/katex.mjs:15242–15282

* Parses an entire function, including its base and all of its arguments.

(breakOnTokenText, name, // For error reporting.
  greediness)

  parseFunction(breakOnTokenText, name, // For error reporting.
  greediness) {
    const token = this.nextToken;
    const func = token.text;
    const funcData = functions[func];

    if (!funcData) {
      return null;
    }

    if (greediness != null && funcData.greediness <= greediness) {
      throw new ParseError("Got function '" + func + "' with no arguments" + (name ? " as " + name : ""), token);
    } else if (this.mode === "text" && !funcData.allowedInText) {
      throw new ParseError("Can't use function '" + func + "' in text mode", token);
    } else if (this.mode === "math" && funcData.allowedInMath === false) {
      throw new ParseError("Can't use function '" + func + "' in math mode", token);
    } // hyperref package sets the catcode of % as an active character


    if (funcData.argTypes && funcData.argTypes[0] === "url") {
      this.gullet.lexer.setCatcode("%", 13);
    } // Consume the command token after possibly switching to the
    // mode specified by the function (for instant mode switching),
    // and then immediately switch back.


    if (funcData.consumeMode) {
      const oldMode = this.mode;
      this.switchMode(funcData.consumeMode);
      this.consume();
      this.switchMode(oldMode);
    } else {
      this.consume();
    }

    const _this$parseArguments = this.parseArguments(func, funcData),
          args = _this$parseArguments.args,
          optArgs = _this$parseArguments.optArgs;

    return this.callFunction(func, args, optArgs, token, breakOnTokenText);
  }
  /**
   * Call a function handler with a suitable context and arguments.
   */