==================
@if statement
==================

@fn show(x: bool) { @if x { <p>Yes</p> } }

---

(template
  (template_element
    (function_definition
      (identifier)
      (parameter_list
        (parameter
          (identifier)
          (rust_type
            (primitive_type))))
      (content_block
        (template_node
          (template_control_flow
            (if_statement
              (expression
                (primary_expression
                  (rust_path)))
              (content_block
                (template_node
                  (html_element
                    (tag_name)
                    (template_node
                      (text_content))
                    (tag_name)))))))))))

==================
@for loop
==================

@fn loop(items: Vec<u32>) { @for n in items { <li>@n</li> } }

---

(template
  (template_element
    (function_definition
      (identifier)
      (parameter_list
        (parameter
          (identifier)
          (rust_type
            (generic_type
              (rust_path)
              (rust_type
                (primitive_type))))))
      (content_block
        (template_node
          (template_control_flow
            (for_loop
              (simple_pattern
                (identifier_pattern
                  (identifier)))
              (expression
                (primary_expression
                  (rust_path)))
              (content_block
                (template_node
                  (html_element
                    (tag_name)
                    (template_node
                      (template_expression
                        (simple_expression
                          (expression_path
                            (identifier)))))
                    (tag_name)))))))))))

==================
@match with literal and wildcard
==================

@fn pick(v: u32) { @match v { 0 => { <p>zero</p> }, _ => { <p>other</p> } } }

---

(template
  (template_element
    (function_definition
      (identifier)
      (parameter_list
        (parameter
          (identifier)
          (rust_type
            (primitive_type))))
      (content_block
        (template_node
          (template_control_flow
            (match_statement
              (expression
                (primary_expression
                  (rust_path)))
              (match_arm
                (pattern
                  (literal
                    (number_literal
                      (integer_literal))))
                (content_block
                  (template_node
                    (html_element
                      (tag_name)
                      (template_node
                        (text_content))
                      (tag_name)))))
              (match_arm
                (pattern
                  (wildcard_pattern))
                (content_block
                  (template_node
                    (html_element
                      (tag_name)
                      (template_node
                        (text_content))
                      (tag_name))))))))))))

==================
@if in HTML attribute position
==================

@fn cb(active: bool) { <input @if active { checked } /> }

---

(template
  (template_element
    (function_definition
      (identifier)
      (parameter_list
        (parameter
          (identifier)
          (rust_type
            (primitive_type))))
      (content_block
        (template_node
          (html_element
            (tag_name)
            (attribute_or_control
              (attribute_control_flow
                (attribute_if_statement
                  (expression
                    (primary_expression
                      (rust_path)))
                  (attribute_or_control
                    (html_attribute
                      (attribute_name))))))))))))