WordPress at a glance
filter is not described

woocommerce_loop_add_to_cart_link filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_loop_add_to_cart_link', 'filter_function_name_907', 10, 3 );
function filter_function_name_907( $sprintf, $product, $args ){
	// filter...

	return $sprintf;
}
$sprintf
-
$product
-
$args
-

Where the hook is called

In file: /templates/loop/add-to-cart.php
woocommerce_loop_add_to_cart_link
woocommerce/templates/loop/add-to-cart.php 24-36
echo apply_filters(
	'woocommerce_loop_add_to_cart_link', // WPCS: XSS ok.
	sprintf(
		'<a href="%s" data-quantity="%s" class="%s" %s>%s</a>',
		esc_url( $product->add_to_cart_url() ),
		esc_attr( isset( $args['quantity'] ) ? $args['quantity'] : 1 ),
		esc_attr( isset( $args['class'] ) ? $args['class'] : 'button' ),
		isset( $args['attributes'] ) ? wc_implode_html_attributes( $args['attributes'] ) : '',
		esc_html( $product->add_to_cart_text() )
	),
	$product,
	$args
);

Where in WP core the hook is used WooCommerce

Usage not found.