use { ast, SyntaxNodeRef, AstNode, SyntaxKind::*, }; {% for node, methods in ast %} // {{ node }} {%- if methods.enum %} #[derive(Debug, Clone, Copy)] pub enum {{ node }}<'a> { {%- for kind in methods.enum %} {{ kind }}({{ kind }}<'a>), {%- endfor %} } impl<'a> AstNode<'a> for {{ node }}<'a> { fn cast(syntax: SyntaxNodeRef<'a>) -> Option { match syntax.kind() { {%- for kind in methods.enum %} {{ kind | SCREAM }} => Some({{ node }}::{{ kind }}({{ kind }} { syntax })), {%- endfor %} _ => None, } } fn syntax(self) -> SyntaxNodeRef<'a> { match self { {%- for kind in methods.enum %} {{ node }}::{{ kind }}(inner) => inner.syntax(), {%- endfor %} } } } {% else %} #[derive(Debug, Clone, Copy)] pub struct {{ node }}<'a> { syntax: SyntaxNodeRef<'a>, } impl<'a> AstNode<'a> for {{ node }}<'a> { fn cast(syntax: SyntaxNodeRef<'a>) -> Option { match syntax.kind() { {{ node | SCREAM }} => Some({{ node }} { syntax }), _ => None, } } fn syntax(self) -> SyntaxNodeRef<'a> { self.syntax } } {% endif %} {% if methods.traits -%} {%- for t in methods.traits -%} impl<'a> ast::{{ t }}<'a> for {{ node }}<'a> {} {% endfor -%} {%- endif -%} impl<'a> {{ node }}<'a> { {%- if methods.collections -%} {%- for m in methods.collections -%} {%- set method_name = m.0 -%} {%- set ChildName = m.1 %} pub fn {{ method_name }}(self) -> impl Iterator> + 'a { self.syntax() .children() .filter_map({{ ChildName }}::cast) } {% endfor -%} {%- endif -%} {%- if methods.options -%} {%- for m in methods.options -%} {%- set method_name = m.0 -%} {%- set ChildName = m.1 %} pub fn {{ method_name }}(self) -> Option<{{ ChildName }}<'a>> { self.syntax() .children() .filter_map({{ ChildName }}::cast) .next() } {% endfor -%} {%- endif -%} } {% endfor %}