Function check_rune_binding

packages/svelte/src/compiler/migrate/index.js:277–284

* @param {"derived"|"props"|"bindable"} rune

(rune)

		 * @param {"derived"|"props"|"bindable"} rune
		 */
		function check_rune_binding(rune) {
			const has_rune_binding = !!state.scope.get(rune);
			if (has_rune_binding) {
				throw new MigrationError(
					`migrating this component would require adding a \`$${rune}\` rune but there's already a variable named ${rune}.\n     Rename the variable and try again or migrate by hand.`
				);
			}
		}

		if (state.props.length > 0 || analysis.uses_rest_props || analysis.uses_props) {
			const has_many_props = state.props.length > 3;