Method addLeafExpression

www/js/_hyperscript.js:1648–1651

(name, definition)

      }
    }
    addLeafExpression(name, definition) {
      this.#leafExpressions.push(name);
      this.addGrammarElement(name, definition);
    }
    addIndirectExpression(name, definition) {
      this.#indirectExpressions.push(name);
      this.addGrammarElement(name, definition);