woocommerce_shortcode_before_(type)_loop action-hookWC 1.0

Usage

add_action( 'woocommerce_shortcode_before_(type)_loop', 'wp_kama_woocommerce_shortcode_before_type_loop_action' );

/**
 * Function for `woocommerce_shortcode_before_(type)_loop` action-hook.
 * 
 * @param  $attributes 
 *
 * @return void
 */
function wp_kama_woocommerce_shortcode_before_type_loop_action( $attributes ){

	// action...
}
$attributes
-

Where the hook is called

WC_Shortcode_Products::product_loop()
woocommerce_shortcode_before_(type)_loop
woocommerce/includes/shortcodes/class-wc-shortcode-products.php 642
do_action( "woocommerce_shortcode_before_{$this->type}_loop", $this->attributes );

Where the hook is used in WooCommerce

woocommerce/includes/wc-template-hooks.php 304
add_action( 'woocommerce_shortcode_before_product_cat_loop', 'woocommerce_output_all_notices', 10 );