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@ -2,6 +2,7 @@ use crate::parser::template;
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use crate::parser::Body;
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use crate::parser::DustTag;
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use crate::parser::Filter;
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use crate::parser::OwnedLiteral;
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use crate::parser::PartialNameElement;
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use crate::parser::Path;
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use crate::parser::Special;
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@ -20,6 +21,7 @@ use crate::renderer::inline_partial_tree::InlinePartialTreeElement;
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use crate::renderer::iteration_context::IterationContext;
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use crate::renderer::parameters_context::ParametersContext;
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use crate::renderer::walking::walk_path;
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use std::borrow::Borrow;
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use std::collections::HashMap;
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#[derive(Clone, Debug)]
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@ -644,11 +646,178 @@ impl<'a> DustRenderer<'a> {
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}
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}
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}
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DustTag::DTHelperSep(parameterized_block) => {
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let new_breadcrumbs = self.new_breadcrumbs_partial(
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breadcrumbs,
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breadcrumbs,
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None,
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¶meterized_block.explicit_context,
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);
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let index = self.get(breadcrumbs, &vec!["$idx"]);
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let len = self.get(breadcrumbs, &vec!["$len"]);
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match (index, len) {
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(Err(_), _) | (_, Err(_)) => {
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return self.render_maybe_body(
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¶meterized_block.contents,
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new_breadcrumbs.as_ref().unwrap_or(breadcrumbs),
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blocks,
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)
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}
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(Ok(index_resolved), Ok(len_resolved)) => {
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// Iteration contexts use OwnedLiteral::LPositiveinteger
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let index_cast = index_resolved
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.get_context_element_reference()
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.to_any()
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.downcast_ref::<OwnedLiteral>();
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let len_cast = len_resolved
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.get_context_element_reference()
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.to_any()
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.downcast_ref::<OwnedLiteral>();
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match (index_cast, len_cast) {
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(
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Some(OwnedLiteral::LPositiveInteger(index_number)),
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Some(OwnedLiteral::LPositiveInteger(len_number)),
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) => {
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if *index_number == len_number - 1 {
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return Ok("".to_owned());
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} else {
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return self.render_maybe_body(
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¶meterized_block.contents,
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new_breadcrumbs.as_ref().unwrap_or(breadcrumbs),
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blocks,
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);
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}
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}
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_ => return Ok("".to_owned()),
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}
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}
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}
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}
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DustTag::DTHelperFirst(parameterized_block) => {
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let new_breadcrumbs = self.new_breadcrumbs_partial(
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breadcrumbs,
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breadcrumbs,
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None,
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¶meterized_block.explicit_context,
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);
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let index = self.get(breadcrumbs, &vec!["$idx"]);
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match index {
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Err(_) => return Ok("".to_owned()),
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Ok(index_resolved) => {
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// Iteration contexts use OwnedLiteral::LPositiveinteger
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let index_cast = index_resolved
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.get_context_element_reference()
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.to_any()
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.downcast_ref::<OwnedLiteral>();
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match index_cast {
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Some(OwnedLiteral::LPositiveInteger(index_number)) => {
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if *index_number != 0 {
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return Ok("".to_owned());
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} else {
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return self.render_maybe_body(
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¶meterized_block.contents,
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new_breadcrumbs.as_ref().unwrap_or(breadcrumbs),
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blocks,
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);
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}
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}
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_ => return Ok("".to_owned()),
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}
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}
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}
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}
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DustTag::DTHelperLast(parameterized_block) => {
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let new_breadcrumbs = self.new_breadcrumbs_partial(
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breadcrumbs,
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breadcrumbs,
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None,
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¶meterized_block.explicit_context,
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);
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let index = self.get(breadcrumbs, &vec!["$idx"]);
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let len = self.get(breadcrumbs, &vec!["$len"]);
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match (index, len) {
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(Err(_), _) | (_, Err(_)) => return Ok("".to_owned()),
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(Ok(index_resolved), Ok(len_resolved)) => {
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// Iteration contexts use OwnedLiteral::LPositiveinteger
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let index_cast = index_resolved
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.get_context_element_reference()
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.to_any()
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.downcast_ref::<OwnedLiteral>();
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let len_cast = len_resolved
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.get_context_element_reference()
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.to_any()
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.downcast_ref::<OwnedLiteral>();
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match (index_cast, len_cast) {
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(
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Some(OwnedLiteral::LPositiveInteger(index_number)),
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Some(OwnedLiteral::LPositiveInteger(len_number)),
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) => {
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if *index_number != len_number - 1 {
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return Ok("".to_owned());
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} else {
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return self.render_maybe_body(
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¶meterized_block.contents,
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new_breadcrumbs.as_ref().unwrap_or(breadcrumbs),
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blocks,
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);
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}
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}
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_ => return Ok("".to_owned()),
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}
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}
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}
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}
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}
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Ok("".to_owned())
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}
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/// Read a value from the context tree
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pub fn get<P>(
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&'a self,
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breadcrumbs: &'a Vec<BreadcrumbTreeElement<'a>>,
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name: &Vec<P>,
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) -> Result<IceResult<'a>, WalkError>
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where
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P: Borrow<str>,
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{
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let val =
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walk_path(breadcrumbs, name).map(|ice| ice.into_context_element(self, breadcrumbs));
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match val {
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Ok(Some(ice_result)) => Ok(ice_result),
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Ok(None) => Err(WalkError::CantWalk),
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Err(walk_error) => Err(walk_error),
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}
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}
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/// Read a value from the parameters context
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///
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/// Returns None if the key is not present at all
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pub fn tap<P>(
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&'a self,
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breadcrumbs: &'a Vec<BreadcrumbTreeElement<'a>>,
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parameters: &'a ParametersContext<'a>,
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name: &P,
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) -> Option<Result<IceResult<'a>, WalkError>>
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where
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P: Borrow<str>,
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{
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if !parameters.contains_key(name.borrow()) {
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return None;
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}
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let val = parameters
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.walk("key")
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.map(|ice| ice.into_context_element(self, breadcrumbs));
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match val {
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Ok(Some(ice_result)) => Some(Ok(ice_result)),
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Ok(None) => Some(Err(WalkError::CantWalk)),
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Err(walk_error) => Some(Err(walk_error)),
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}
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}
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fn new_breadcrumbs_section<'b>(
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&'b self,
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breadcrumbs: &'b Vec<BreadcrumbTreeElement<'b>>,
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