src/vendor/handlebars/src/helpers/helper_log.rs

   1 use helpers::HelperDef;
   2 use registry::Registry;
   3 use context::JsonRender;
   4 use render::{RenderContext, RenderError, Helper};
   5
   6 #[derive(Clone, Copy)]
   7 pub struct LogHelper;
   8
   9 impl HelperDef for LogHelper {
  10     fn call(&self, h: &Helper, _: &Registry, _: &mut RenderContext) -> Result<(), RenderError> {
  11         let param = try!(h.param(0)
  12                           .ok_or_else(|| RenderError::new("Param not found for helper \"log\"")));
  13
  14         info!("{}: {}",
  15               param.path().unwrap_or(&"".to_owned()),
  16               param.value().render());
  17
  18         Ok(())
  19     }
  20 }
  21
  22 pub static LOG_HELPER: LogHelper = LogHelper;