Struct handlebars::TemplateError
source · pub struct TemplateError {
pub reason: TemplateErrorReason,
pub template_name: Option<String>,
pub line_no: Option<usize>,
pub column_no: Option<usize>,
/* private fields */
}
Expand description
Error on parsing template.
Fields§
§reason: TemplateErrorReason
👎Deprecated: public access to reason to be removed soon, use .reason() instead.
§template_name: Option<String>
§line_no: Option<usize>
§column_no: Option<usize>
Implementations§
source§impl TemplateError
impl TemplateError
sourcepub fn of(e: TemplateErrorReason) -> TemplateError
pub fn of(e: TemplateErrorReason) -> TemplateError
Examples found in repository?
More examples
src/template.rs (line 204)
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pub fn parse(s: &str) -> Result<Parameter, TemplateError> {
let parser = HandlebarsParser::parse(Rule::parameter, s)
.map_err(|_| TemplateError::of(TemplateErrorReason::InvalidParam(s.to_owned())))?;
let mut it = parser.flatten().peekable();
Template::parse_param(s, &mut it, s.len() - 1)
}
fn debug_name(&self) -> String {
if let Some(name) = self.as_name() {
name.to_owned()
} else {
format!("{:?}", self)
}
}
}
impl Template {
pub fn new() -> Template {
Template::default()
}
fn push_element(&mut self, e: TemplateElement, line: usize, col: usize) {
self.elements.push(e);
self.mapping.push(TemplateMapping(line, col));
}
fn parse_subexpression<'a, I>(
source: &'a str,
it: &mut Peekable<I>,
limit: usize,
) -> Result<Parameter, TemplateError>
where
I: Iterator<Item = Pair<'a, Rule>>,
{
let espec = Template::parse_expression(source, it.by_ref(), limit)?;
Ok(Parameter::Subexpression(Subexpression::new(
espec.name,
espec.params,
espec.hash,
)))
}
fn parse_name<'a, I>(
source: &'a str,
it: &mut Peekable<I>,
_: usize,
) -> Result<Parameter, TemplateError>
where
I: Iterator<Item = Pair<'a, Rule>>,
{
let name_node = it.next().unwrap();
let rule = name_node.as_rule();
let name_span = name_node.as_span();
match rule {
Rule::identifier | Rule::partial_identifier | Rule::invert_tag_item => {
Ok(Parameter::Name(name_span.as_str().to_owned()))
}
Rule::reference => {
let paths = parse_json_path_from_iter(it, name_span.end());
Ok(Parameter::Path(Path::new(name_span.as_str(), paths)))
}
Rule::subexpression => {
Template::parse_subexpression(source, it.by_ref(), name_span.end())
}
_ => unreachable!(),
}
}
fn parse_param<'a, I>(
source: &'a str,
it: &mut Peekable<I>,
_: usize,
) -> Result<Parameter, TemplateError>
where
I: Iterator<Item = Pair<'a, Rule>>,
{
let mut param = it.next().unwrap();
if param.as_rule() == Rule::param {
param = it.next().unwrap();
}
let param_rule = param.as_rule();
let param_span = param.as_span();
let result = match param_rule {
Rule::reference => {
let path_segs = parse_json_path_from_iter(it, param_span.end());
Parameter::Path(Path::new(param_span.as_str(), path_segs))
}
Rule::literal => {
let s = param_span.as_str();
if let Ok(json) = Json::from_str(s) {
Parameter::Literal(json)
} else {
Parameter::Name(s.to_owned())
}
}
Rule::subexpression => {
Template::parse_subexpression(source, it.by_ref(), param_span.end())?
}
_ => unreachable!(),
};
while let Some(n) = it.peek() {
let n_span = n.as_span();
if n_span.end() > param_span.end() {
break;
}
it.next();
}
Ok(result)
}
fn parse_hash<'a, I>(
source: &'a str,
it: &mut Peekable<I>,
limit: usize,
) -> Result<(String, Parameter), TemplateError>
where
I: Iterator<Item = Pair<'a, Rule>>,
{
let name = it.next().unwrap();
let name_node = name.as_span();
// identifier
let key = name_node.as_str().to_owned();
let value = Template::parse_param(source, it.by_ref(), limit)?;
Ok((key, value))
}
fn parse_block_param<'a, I>(_: &'a str, it: &mut Peekable<I>, limit: usize) -> BlockParam
where
I: Iterator<Item = Pair<'a, Rule>>,
{
let p1_name = it.next().unwrap();
let p1_name_span = p1_name.as_span();
// identifier
let p1 = p1_name_span.as_str().to_owned();
let p2 = it.peek().and_then(|p2_name| {
let p2_name_span = p2_name.as_span();
if p2_name_span.end() <= limit {
Some(p2_name_span.as_str().to_owned())
} else {
None
}
});
if let Some(p2) = p2 {
it.next();
BlockParam::Pair((Parameter::Name(p1), Parameter::Name(p2)))
} else {
BlockParam::Single(Parameter::Name(p1))
}
}
fn parse_expression<'a, I>(
source: &'a str,
it: &mut Peekable<I>,
limit: usize,
) -> Result<ExpressionSpec, TemplateError>
where
I: Iterator<Item = Pair<'a, Rule>>,
{
let mut params: Vec<Parameter> = Vec::new();
let mut hashes: HashMap<String, Parameter> = HashMap::new();
let mut omit_pre_ws = false;
let mut omit_pro_ws = false;
let mut block_param = None;
if it.peek().unwrap().as_rule() == Rule::pre_whitespace_omitter {
omit_pre_ws = true;
it.next();
}
let name = Template::parse_name(source, it.by_ref(), limit)?;
loop {
let rule;
let end;
if let Some(pair) = it.peek() {
let pair_span = pair.as_span();
if pair_span.end() < limit {
rule = pair.as_rule();
end = pair_span.end();
} else {
break;
}
} else {
break;
}
it.next();
match rule {
Rule::param => {
params.push(Template::parse_param(source, it.by_ref(), end)?);
}
Rule::hash => {
let (key, value) = Template::parse_hash(source, it.by_ref(), end)?;
hashes.insert(key, value);
}
Rule::block_param => {
block_param = Some(Template::parse_block_param(source, it.by_ref(), end));
}
Rule::pro_whitespace_omitter => {
omit_pro_ws = true;
}
_ => {}
}
}
Ok(ExpressionSpec {
name,
params,
hash: hashes,
block_param,
omit_pre_ws,
omit_pro_ws,
})
}
fn remove_previous_whitespace(template_stack: &mut VecDeque<Template>) {
let t = template_stack.front_mut().unwrap();
if let Some(RawString(ref mut text)) = t.elements.last_mut() {
*text = text.trim_end().to_owned();
}
}
// in handlebars, the whitespaces around statement are
// automatically trimed.
// this function checks if current span has both leading and
// trailing whitespaces, which we treat as a standalone statement.
//
//
fn process_standalone_statement(
template_stack: &mut VecDeque<Template>,
source: &str,
current_span: &Span<'_>,
prevent_indent: bool,
) -> bool {
let with_trailing_newline =
support::str::starts_with_empty_line(&source[current_span.end()..]);
if with_trailing_newline {
let with_leading_newline =
support::str::ends_with_empty_line(&source[..current_span.start()]);
// prevent_indent: a special toggle for partial expression
// (>) that leading whitespaces are kept
if prevent_indent && with_leading_newline {
let t = template_stack.front_mut().unwrap();
// check the last element before current
if let Some(RawString(ref mut text)) = t.elements.last_mut() {
// trim leading space for standalone statement
*text = text
.trim_end_matches(support::str::whitespace_matcher)
.to_owned();
}
}
// return true when the item is the first element in root template
current_span.start() == 0 || with_leading_newline
} else {
false
}
}
fn raw_string<'a>(
source: &'a str,
pair: Option<Pair<'a, Rule>>,
trim_start: bool,
trim_start_line: bool,
) -> TemplateElement {
let mut s = String::from(source);
if let Some(pair) = pair {
// the source may contains leading space because of pest's limitation
// we calculate none space start here in order to correct the offset
let pair_span = pair.as_span();
let current_start = pair_span.start();
let span_length = pair_span.end() - current_start;
let leading_space_offset = s.len() - span_length;
// we would like to iterate pair reversely in order to remove certain
// index from our string buffer so here we convert the inner pairs to
// a vector.
for sub_pair in pair.into_inner().rev() {
// remove escaped backslash
if sub_pair.as_rule() == Rule::escape {
let escape_span = sub_pair.as_span();
let backslash_pos = escape_span.start();
let backslash_rel_pos = leading_space_offset + backslash_pos - current_start;
s.remove(backslash_rel_pos);
}
}
}
if trim_start {
RawString(s.trim_start().to_owned())
} else if trim_start_line {
let s = s.trim_start_matches(support::str::whitespace_matcher);
RawString(support::str::strip_first_newline(s).to_owned())
} else {
RawString(s)
}
}
pub(crate) fn compile2(
source: &str,
options: TemplateOptions,
) -> Result<Template, TemplateError> {
let mut helper_stack: VecDeque<HelperTemplate> = VecDeque::new();
let mut decorator_stack: VecDeque<DecoratorTemplate> = VecDeque::new();
let mut template_stack: VecDeque<Template> = VecDeque::new();
let mut omit_pro_ws = false;
// flag for newline removal of standalone statements
// this option is marked as true when standalone statement is detected
// then the leading whitespaces and newline of next rawstring will be trimed
let mut trim_line_required = false;
let parser_queue = HandlebarsParser::parse(Rule::handlebars, source).map_err(|e| {
let (line_no, col_no) = match e.line_col {
LineColLocation::Pos(line_col) => line_col,
LineColLocation::Span(line_col, _) => line_col,
};
TemplateError::of(TemplateErrorReason::InvalidSyntax)
.at(source, line_no, col_no)
.in_template(options.name())
})?;
// dbg!(parser_queue.clone().flatten());
// remove escape from our pair queue
let mut it = parser_queue
.flatten()
.filter(|p| {
// remove rules that should be silent but not for now due to pest limitation
!matches!(p.as_rule(), Rule::escape)
})
.peekable();
let mut end_pos: Option<Position<'_>> = None;
loop {
if let Some(pair) = it.next() {
let prev_end = end_pos.as_ref().map(|p| p.pos()).unwrap_or(0);
let rule = pair.as_rule();
let span = pair.as_span();
let is_trailing_string = rule != Rule::template
&& span.start() != prev_end
&& !omit_pro_ws
&& rule != Rule::raw_text
&& rule != Rule::raw_block_text;
if is_trailing_string {
// trailing string check
let (line_no, col_no) = span.start_pos().line_col();
if rule == Rule::raw_block_end {
let mut t = Template::new();
t.push_element(
Template::raw_string(
&source[prev_end..span.start()],
None,
false,
trim_line_required,
),
line_no,
col_no,
);
template_stack.push_front(t);
} else {
let t = template_stack.front_mut().unwrap();
t.push_element(
Template::raw_string(
&source[prev_end..span.start()],
None,
false,
trim_line_required,
),
line_no,
col_no,
);
}
// reset standalone statement marker
trim_line_required = false;
}
let (line_no, col_no) = span.start_pos().line_col();
match rule {
Rule::template => {
template_stack.push_front(Template::new());
}
Rule::raw_text => {
// leading space fix
let start = if span.start() != prev_end {
prev_end
} else {
span.start()
};
let t = template_stack.front_mut().unwrap();
t.push_element(
Template::raw_string(
&source[start..span.end()],
Some(pair.clone()),
omit_pro_ws,
trim_line_required,
),
line_no,
col_no,
);
// reset standalone statement marker
trim_line_required = false;
}
Rule::helper_block_start
| Rule::raw_block_start
| Rule::decorator_block_start
| Rule::partial_block_start => {
let exp = Template::parse_expression(source, it.by_ref(), span.end())?;
match rule {
Rule::helper_block_start | Rule::raw_block_start => {
let helper_template = HelperTemplate::new(exp.clone(), true);
helper_stack.push_front(helper_template);
}
Rule::decorator_block_start | Rule::partial_block_start => {
let decorator = DecoratorTemplate::new(exp.clone());
decorator_stack.push_front(decorator);
}
_ => unreachable!(),
}
if exp.omit_pre_ws {
Template::remove_previous_whitespace(&mut template_stack);
}
omit_pro_ws = exp.omit_pro_ws;
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let t = template_stack.front_mut().unwrap();
t.mapping.push(TemplateMapping(line_no, col_no));
}
Rule::invert_tag => {
// hack: invert_tag structure is similar to ExpressionSpec, so I
// use it here to represent the data
let exp = Template::parse_expression(source, it.by_ref(), span.end())?;
if exp.omit_pre_ws {
Template::remove_previous_whitespace(&mut template_stack);
}
omit_pro_ws = exp.omit_pro_ws;
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let t = template_stack.pop_front().unwrap();
let h = helper_stack.front_mut().unwrap();
h.template = Some(t);
}
Rule::raw_block_text => {
let mut t = Template::new();
t.push_element(
Template::raw_string(
span.as_str(),
Some(pair.clone()),
omit_pro_ws,
trim_line_required,
),
line_no,
col_no,
);
template_stack.push_front(t);
}
Rule::expression
| Rule::html_expression
| Rule::decorator_expression
| Rule::partial_expression
| Rule::helper_block_end
| Rule::raw_block_end
| Rule::decorator_block_end
| Rule::partial_block_end => {
let exp = Template::parse_expression(source, it.by_ref(), span.end())?;
if exp.omit_pre_ws {
Template::remove_previous_whitespace(&mut template_stack);
}
omit_pro_ws = exp.omit_pro_ws;
match rule {
Rule::expression | Rule::html_expression => {
let helper_template = HelperTemplate::new(exp.clone(), false);
let el = if rule == Rule::expression {
Expression(Box::new(helper_template))
} else {
HtmlExpression(Box::new(helper_template))
};
let t = template_stack.front_mut().unwrap();
t.push_element(el, line_no, col_no);
}
Rule::decorator_expression | Rule::partial_expression => {
// do not auto trim ident spaces for
// partial_expression(>)
let prevent_indent = rule != Rule::partial_expression;
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
prevent_indent,
);
// indent for partial expression >
let mut indent = None;
if rule == Rule::partial_expression
&& !options.prevent_indent
&& !exp.omit_pre_ws
{
indent = support::str::find_trailing_whitespace_chars(
&source[..span.start()],
);
}
let mut decorator = DecoratorTemplate::new(exp.clone());
decorator.indent = indent.map(|s| s.to_owned());
let el = if rule == Rule::decorator_expression {
DecoratorExpression(Box::new(decorator))
} else {
PartialExpression(Box::new(decorator))
};
let t = template_stack.front_mut().unwrap();
t.push_element(el, line_no, col_no);
}
Rule::helper_block_end | Rule::raw_block_end => {
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let mut h = helper_stack.pop_front().unwrap();
let close_tag_name = exp.name.as_name();
if h.name.as_name() == close_tag_name {
let prev_t = template_stack.pop_front().unwrap();
if h.template.is_some() {
h.inverse = Some(prev_t);
} else {
h.template = Some(prev_t);
}
let t = template_stack.front_mut().unwrap();
t.elements.push(HelperBlock(Box::new(h)));
} else {
return Err(TemplateError::of(
TemplateErrorReason::MismatchingClosedHelper(
h.name.debug_name(),
exp.name.debug_name(),
),
)
.at(source, line_no, col_no)
.in_template(options.name()));
}
}
Rule::decorator_block_end | Rule::partial_block_end => {
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let mut d = decorator_stack.pop_front().unwrap();
let close_tag_name = exp.name.as_name();
if d.name.as_name() == close_tag_name {
let prev_t = template_stack.pop_front().unwrap();
d.template = Some(prev_t);
let t = template_stack.front_mut().unwrap();
if rule == Rule::decorator_block_end {
t.elements.push(DecoratorBlock(Box::new(d)));
} else {
t.elements.push(PartialBlock(Box::new(d)));
}
} else {
return Err(TemplateError::of(
TemplateErrorReason::MismatchingClosedDecorator(
d.name.debug_name(),
exp.name.debug_name(),
),
)
.at(source, line_no, col_no)
.in_template(options.name()));
}
}
_ => unreachable!(),
}
}
Rule::hbs_comment_compact => {
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let text = span
.as_str()
.trim_start_matches("{{!")
.trim_end_matches("}}");
let t = template_stack.front_mut().unwrap();
t.push_element(Comment(text.to_owned()), line_no, col_no);
}
Rule::hbs_comment => {
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let text = span
.as_str()
.trim_start_matches("{{!--")
.trim_end_matches("--}}");
let t = template_stack.front_mut().unwrap();
t.push_element(Comment(text.to_owned()), line_no, col_no);
}
_ => {}
}
if rule != Rule::template {
end_pos = Some(span.end_pos());
}
} else {
let prev_end = end_pos.as_ref().map(|e| e.pos()).unwrap_or(0);
if prev_end < source.len() {
let text = &source[prev_end..source.len()];
// is some called in if check
let (line_no, col_no) = end_pos.unwrap().line_col();
let t = template_stack.front_mut().unwrap();
t.push_element(RawString(text.to_owned()), line_no, col_no);
}
let mut root_template = template_stack.pop_front().unwrap();
root_template.name = options.name;
return Ok(root_template);
}
}
}
sourcepub fn at(
self,
template_str: &str,
line_no: usize,
column_no: usize
) -> TemplateError
pub fn at(
self,
template_str: &str,
line_no: usize,
column_no: usize
) -> TemplateError
Examples found in repository?
src/template.rs (line 531)
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pub(crate) fn compile2(
source: &str,
options: TemplateOptions,
) -> Result<Template, TemplateError> {
let mut helper_stack: VecDeque<HelperTemplate> = VecDeque::new();
let mut decorator_stack: VecDeque<DecoratorTemplate> = VecDeque::new();
let mut template_stack: VecDeque<Template> = VecDeque::new();
let mut omit_pro_ws = false;
// flag for newline removal of standalone statements
// this option is marked as true when standalone statement is detected
// then the leading whitespaces and newline of next rawstring will be trimed
let mut trim_line_required = false;
let parser_queue = HandlebarsParser::parse(Rule::handlebars, source).map_err(|e| {
let (line_no, col_no) = match e.line_col {
LineColLocation::Pos(line_col) => line_col,
LineColLocation::Span(line_col, _) => line_col,
};
TemplateError::of(TemplateErrorReason::InvalidSyntax)
.at(source, line_no, col_no)
.in_template(options.name())
})?;
// dbg!(parser_queue.clone().flatten());
// remove escape from our pair queue
let mut it = parser_queue
.flatten()
.filter(|p| {
// remove rules that should be silent but not for now due to pest limitation
!matches!(p.as_rule(), Rule::escape)
})
.peekable();
let mut end_pos: Option<Position<'_>> = None;
loop {
if let Some(pair) = it.next() {
let prev_end = end_pos.as_ref().map(|p| p.pos()).unwrap_or(0);
let rule = pair.as_rule();
let span = pair.as_span();
let is_trailing_string = rule != Rule::template
&& span.start() != prev_end
&& !omit_pro_ws
&& rule != Rule::raw_text
&& rule != Rule::raw_block_text;
if is_trailing_string {
// trailing string check
let (line_no, col_no) = span.start_pos().line_col();
if rule == Rule::raw_block_end {
let mut t = Template::new();
t.push_element(
Template::raw_string(
&source[prev_end..span.start()],
None,
false,
trim_line_required,
),
line_no,
col_no,
);
template_stack.push_front(t);
} else {
let t = template_stack.front_mut().unwrap();
t.push_element(
Template::raw_string(
&source[prev_end..span.start()],
None,
false,
trim_line_required,
),
line_no,
col_no,
);
}
// reset standalone statement marker
trim_line_required = false;
}
let (line_no, col_no) = span.start_pos().line_col();
match rule {
Rule::template => {
template_stack.push_front(Template::new());
}
Rule::raw_text => {
// leading space fix
let start = if span.start() != prev_end {
prev_end
} else {
span.start()
};
let t = template_stack.front_mut().unwrap();
t.push_element(
Template::raw_string(
&source[start..span.end()],
Some(pair.clone()),
omit_pro_ws,
trim_line_required,
),
line_no,
col_no,
);
// reset standalone statement marker
trim_line_required = false;
}
Rule::helper_block_start
| Rule::raw_block_start
| Rule::decorator_block_start
| Rule::partial_block_start => {
let exp = Template::parse_expression(source, it.by_ref(), span.end())?;
match rule {
Rule::helper_block_start | Rule::raw_block_start => {
let helper_template = HelperTemplate::new(exp.clone(), true);
helper_stack.push_front(helper_template);
}
Rule::decorator_block_start | Rule::partial_block_start => {
let decorator = DecoratorTemplate::new(exp.clone());
decorator_stack.push_front(decorator);
}
_ => unreachable!(),
}
if exp.omit_pre_ws {
Template::remove_previous_whitespace(&mut template_stack);
}
omit_pro_ws = exp.omit_pro_ws;
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let t = template_stack.front_mut().unwrap();
t.mapping.push(TemplateMapping(line_no, col_no));
}
Rule::invert_tag => {
// hack: invert_tag structure is similar to ExpressionSpec, so I
// use it here to represent the data
let exp = Template::parse_expression(source, it.by_ref(), span.end())?;
if exp.omit_pre_ws {
Template::remove_previous_whitespace(&mut template_stack);
}
omit_pro_ws = exp.omit_pro_ws;
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let t = template_stack.pop_front().unwrap();
let h = helper_stack.front_mut().unwrap();
h.template = Some(t);
}
Rule::raw_block_text => {
let mut t = Template::new();
t.push_element(
Template::raw_string(
span.as_str(),
Some(pair.clone()),
omit_pro_ws,
trim_line_required,
),
line_no,
col_no,
);
template_stack.push_front(t);
}
Rule::expression
| Rule::html_expression
| Rule::decorator_expression
| Rule::partial_expression
| Rule::helper_block_end
| Rule::raw_block_end
| Rule::decorator_block_end
| Rule::partial_block_end => {
let exp = Template::parse_expression(source, it.by_ref(), span.end())?;
if exp.omit_pre_ws {
Template::remove_previous_whitespace(&mut template_stack);
}
omit_pro_ws = exp.omit_pro_ws;
match rule {
Rule::expression | Rule::html_expression => {
let helper_template = HelperTemplate::new(exp.clone(), false);
let el = if rule == Rule::expression {
Expression(Box::new(helper_template))
} else {
HtmlExpression(Box::new(helper_template))
};
let t = template_stack.front_mut().unwrap();
t.push_element(el, line_no, col_no);
}
Rule::decorator_expression | Rule::partial_expression => {
// do not auto trim ident spaces for
// partial_expression(>)
let prevent_indent = rule != Rule::partial_expression;
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
prevent_indent,
);
// indent for partial expression >
let mut indent = None;
if rule == Rule::partial_expression
&& !options.prevent_indent
&& !exp.omit_pre_ws
{
indent = support::str::find_trailing_whitespace_chars(
&source[..span.start()],
);
}
let mut decorator = DecoratorTemplate::new(exp.clone());
decorator.indent = indent.map(|s| s.to_owned());
let el = if rule == Rule::decorator_expression {
DecoratorExpression(Box::new(decorator))
} else {
PartialExpression(Box::new(decorator))
};
let t = template_stack.front_mut().unwrap();
t.push_element(el, line_no, col_no);
}
Rule::helper_block_end | Rule::raw_block_end => {
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let mut h = helper_stack.pop_front().unwrap();
let close_tag_name = exp.name.as_name();
if h.name.as_name() == close_tag_name {
let prev_t = template_stack.pop_front().unwrap();
if h.template.is_some() {
h.inverse = Some(prev_t);
} else {
h.template = Some(prev_t);
}
let t = template_stack.front_mut().unwrap();
t.elements.push(HelperBlock(Box::new(h)));
} else {
return Err(TemplateError::of(
TemplateErrorReason::MismatchingClosedHelper(
h.name.debug_name(),
exp.name.debug_name(),
),
)
.at(source, line_no, col_no)
.in_template(options.name()));
}
}
Rule::decorator_block_end | Rule::partial_block_end => {
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let mut d = decorator_stack.pop_front().unwrap();
let close_tag_name = exp.name.as_name();
if d.name.as_name() == close_tag_name {
let prev_t = template_stack.pop_front().unwrap();
d.template = Some(prev_t);
let t = template_stack.front_mut().unwrap();
if rule == Rule::decorator_block_end {
t.elements.push(DecoratorBlock(Box::new(d)));
} else {
t.elements.push(PartialBlock(Box::new(d)));
}
} else {
return Err(TemplateError::of(
TemplateErrorReason::MismatchingClosedDecorator(
d.name.debug_name(),
exp.name.debug_name(),
),
)
.at(source, line_no, col_no)
.in_template(options.name()));
}
}
_ => unreachable!(),
}
}
Rule::hbs_comment_compact => {
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let text = span
.as_str()
.trim_start_matches("{{!")
.trim_end_matches("}}");
let t = template_stack.front_mut().unwrap();
t.push_element(Comment(text.to_owned()), line_no, col_no);
}
Rule::hbs_comment => {
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let text = span
.as_str()
.trim_start_matches("{{!--")
.trim_end_matches("--}}");
let t = template_stack.front_mut().unwrap();
t.push_element(Comment(text.to_owned()), line_no, col_no);
}
_ => {}
}
if rule != Rule::template {
end_pos = Some(span.end_pos());
}
} else {
let prev_end = end_pos.as_ref().map(|e| e.pos()).unwrap_or(0);
if prev_end < source.len() {
let text = &source[prev_end..source.len()];
// is some called in if check
let (line_no, col_no) = end_pos.unwrap().line_col();
let t = template_stack.front_mut().unwrap();
t.push_element(RawString(text.to_owned()), line_no, col_no);
}
let mut root_template = template_stack.pop_front().unwrap();
root_template.name = options.name;
return Ok(root_template);
}
}
}
sourcepub fn in_template(self, name: String) -> TemplateError
pub fn in_template(self, name: String) -> TemplateError
Examples found in repository?
src/template.rs (line 532)
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pub(crate) fn compile2(
source: &str,
options: TemplateOptions,
) -> Result<Template, TemplateError> {
let mut helper_stack: VecDeque<HelperTemplate> = VecDeque::new();
let mut decorator_stack: VecDeque<DecoratorTemplate> = VecDeque::new();
let mut template_stack: VecDeque<Template> = VecDeque::new();
let mut omit_pro_ws = false;
// flag for newline removal of standalone statements
// this option is marked as true when standalone statement is detected
// then the leading whitespaces and newline of next rawstring will be trimed
let mut trim_line_required = false;
let parser_queue = HandlebarsParser::parse(Rule::handlebars, source).map_err(|e| {
let (line_no, col_no) = match e.line_col {
LineColLocation::Pos(line_col) => line_col,
LineColLocation::Span(line_col, _) => line_col,
};
TemplateError::of(TemplateErrorReason::InvalidSyntax)
.at(source, line_no, col_no)
.in_template(options.name())
})?;
// dbg!(parser_queue.clone().flatten());
// remove escape from our pair queue
let mut it = parser_queue
.flatten()
.filter(|p| {
// remove rules that should be silent but not for now due to pest limitation
!matches!(p.as_rule(), Rule::escape)
})
.peekable();
let mut end_pos: Option<Position<'_>> = None;
loop {
if let Some(pair) = it.next() {
let prev_end = end_pos.as_ref().map(|p| p.pos()).unwrap_or(0);
let rule = pair.as_rule();
let span = pair.as_span();
let is_trailing_string = rule != Rule::template
&& span.start() != prev_end
&& !omit_pro_ws
&& rule != Rule::raw_text
&& rule != Rule::raw_block_text;
if is_trailing_string {
// trailing string check
let (line_no, col_no) = span.start_pos().line_col();
if rule == Rule::raw_block_end {
let mut t = Template::new();
t.push_element(
Template::raw_string(
&source[prev_end..span.start()],
None,
false,
trim_line_required,
),
line_no,
col_no,
);
template_stack.push_front(t);
} else {
let t = template_stack.front_mut().unwrap();
t.push_element(
Template::raw_string(
&source[prev_end..span.start()],
None,
false,
trim_line_required,
),
line_no,
col_no,
);
}
// reset standalone statement marker
trim_line_required = false;
}
let (line_no, col_no) = span.start_pos().line_col();
match rule {
Rule::template => {
template_stack.push_front(Template::new());
}
Rule::raw_text => {
// leading space fix
let start = if span.start() != prev_end {
prev_end
} else {
span.start()
};
let t = template_stack.front_mut().unwrap();
t.push_element(
Template::raw_string(
&source[start..span.end()],
Some(pair.clone()),
omit_pro_ws,
trim_line_required,
),
line_no,
col_no,
);
// reset standalone statement marker
trim_line_required = false;
}
Rule::helper_block_start
| Rule::raw_block_start
| Rule::decorator_block_start
| Rule::partial_block_start => {
let exp = Template::parse_expression(source, it.by_ref(), span.end())?;
match rule {
Rule::helper_block_start | Rule::raw_block_start => {
let helper_template = HelperTemplate::new(exp.clone(), true);
helper_stack.push_front(helper_template);
}
Rule::decorator_block_start | Rule::partial_block_start => {
let decorator = DecoratorTemplate::new(exp.clone());
decorator_stack.push_front(decorator);
}
_ => unreachable!(),
}
if exp.omit_pre_ws {
Template::remove_previous_whitespace(&mut template_stack);
}
omit_pro_ws = exp.omit_pro_ws;
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let t = template_stack.front_mut().unwrap();
t.mapping.push(TemplateMapping(line_no, col_no));
}
Rule::invert_tag => {
// hack: invert_tag structure is similar to ExpressionSpec, so I
// use it here to represent the data
let exp = Template::parse_expression(source, it.by_ref(), span.end())?;
if exp.omit_pre_ws {
Template::remove_previous_whitespace(&mut template_stack);
}
omit_pro_ws = exp.omit_pro_ws;
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let t = template_stack.pop_front().unwrap();
let h = helper_stack.front_mut().unwrap();
h.template = Some(t);
}
Rule::raw_block_text => {
let mut t = Template::new();
t.push_element(
Template::raw_string(
span.as_str(),
Some(pair.clone()),
omit_pro_ws,
trim_line_required,
),
line_no,
col_no,
);
template_stack.push_front(t);
}
Rule::expression
| Rule::html_expression
| Rule::decorator_expression
| Rule::partial_expression
| Rule::helper_block_end
| Rule::raw_block_end
| Rule::decorator_block_end
| Rule::partial_block_end => {
let exp = Template::parse_expression(source, it.by_ref(), span.end())?;
if exp.omit_pre_ws {
Template::remove_previous_whitespace(&mut template_stack);
}
omit_pro_ws = exp.omit_pro_ws;
match rule {
Rule::expression | Rule::html_expression => {
let helper_template = HelperTemplate::new(exp.clone(), false);
let el = if rule == Rule::expression {
Expression(Box::new(helper_template))
} else {
HtmlExpression(Box::new(helper_template))
};
let t = template_stack.front_mut().unwrap();
t.push_element(el, line_no, col_no);
}
Rule::decorator_expression | Rule::partial_expression => {
// do not auto trim ident spaces for
// partial_expression(>)
let prevent_indent = rule != Rule::partial_expression;
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
prevent_indent,
);
// indent for partial expression >
let mut indent = None;
if rule == Rule::partial_expression
&& !options.prevent_indent
&& !exp.omit_pre_ws
{
indent = support::str::find_trailing_whitespace_chars(
&source[..span.start()],
);
}
let mut decorator = DecoratorTemplate::new(exp.clone());
decorator.indent = indent.map(|s| s.to_owned());
let el = if rule == Rule::decorator_expression {
DecoratorExpression(Box::new(decorator))
} else {
PartialExpression(Box::new(decorator))
};
let t = template_stack.front_mut().unwrap();
t.push_element(el, line_no, col_no);
}
Rule::helper_block_end | Rule::raw_block_end => {
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let mut h = helper_stack.pop_front().unwrap();
let close_tag_name = exp.name.as_name();
if h.name.as_name() == close_tag_name {
let prev_t = template_stack.pop_front().unwrap();
if h.template.is_some() {
h.inverse = Some(prev_t);
} else {
h.template = Some(prev_t);
}
let t = template_stack.front_mut().unwrap();
t.elements.push(HelperBlock(Box::new(h)));
} else {
return Err(TemplateError::of(
TemplateErrorReason::MismatchingClosedHelper(
h.name.debug_name(),
exp.name.debug_name(),
),
)
.at(source, line_no, col_no)
.in_template(options.name()));
}
}
Rule::decorator_block_end | Rule::partial_block_end => {
// standalone statement check, it also removes leading whitespaces of
// previous rawstring when standalone statement detected
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let mut d = decorator_stack.pop_front().unwrap();
let close_tag_name = exp.name.as_name();
if d.name.as_name() == close_tag_name {
let prev_t = template_stack.pop_front().unwrap();
d.template = Some(prev_t);
let t = template_stack.front_mut().unwrap();
if rule == Rule::decorator_block_end {
t.elements.push(DecoratorBlock(Box::new(d)));
} else {
t.elements.push(PartialBlock(Box::new(d)));
}
} else {
return Err(TemplateError::of(
TemplateErrorReason::MismatchingClosedDecorator(
d.name.debug_name(),
exp.name.debug_name(),
),
)
.at(source, line_no, col_no)
.in_template(options.name()));
}
}
_ => unreachable!(),
}
}
Rule::hbs_comment_compact => {
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let text = span
.as_str()
.trim_start_matches("{{!")
.trim_end_matches("}}");
let t = template_stack.front_mut().unwrap();
t.push_element(Comment(text.to_owned()), line_no, col_no);
}
Rule::hbs_comment => {
trim_line_required = Template::process_standalone_statement(
&mut template_stack,
source,
&span,
true,
);
let text = span
.as_str()
.trim_start_matches("{{!--")
.trim_end_matches("--}}");
let t = template_stack.front_mut().unwrap();
t.push_element(Comment(text.to_owned()), line_no, col_no);
}
_ => {}
}
if rule != Rule::template {
end_pos = Some(span.end_pos());
}
} else {
let prev_end = end_pos.as_ref().map(|e| e.pos()).unwrap_or(0);
if prev_end < source.len() {
let text = &source[prev_end..source.len()];
// is some called in if check
let (line_no, col_no) = end_pos.unwrap().line_col();
let t = template_stack.front_mut().unwrap();
t.push_element(RawString(text.to_owned()), line_no, col_no);
}
let mut root_template = template_stack.pop_front().unwrap();
root_template.name = options.name;
return Ok(root_template);
}
}
}
sourcepub fn reason(&self) -> &TemplateErrorReason
pub fn reason(&self) -> &TemplateErrorReason
Get underlying reason for the error
Examples found in repository?
src/error.rs (line 239)
234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
match (self.line_no, self.column_no, &self.segment) {
(Some(line), Some(col), &Some(ref seg)) => writeln!(
f,
"Template error: {}\n --> Template error in \"{}\":{}:{}\n |\n{} |\n = reason: {}",
self.reason(),
self.template_name
.as_ref()
.unwrap_or(&"Unnamed template".to_owned()),
line,
col,
seg,
self.reason()
),
_ => write!(f, "{}", self.reason()),
}
}
Trait Implementations§
source§impl Debug for TemplateError
impl Debug for TemplateError
source§impl Display for TemplateError
impl Display for TemplateError
source§impl Error for TemplateError
impl Error for TemplateError
1.30.0 · source§fn source(&self) -> Option<&(dyn Error + 'static)>
fn source(&self) -> Option<&(dyn Error + 'static)>
The lower-level source of this error, if any. Read more
1.0.0 · source§fn description(&self) -> &str
fn description(&self) -> &str
👎Deprecated since 1.42.0: use the Display impl or to_string()
source§impl From<Error> for TemplateError
impl From<Error> for TemplateError
source§fn from(e: WalkdirError) -> TemplateError
fn from(e: WalkdirError) -> TemplateError
Converts to this type from the input type.
source§impl From<TemplateError> for RenderError
impl From<TemplateError> for RenderError
source§fn from(e: TemplateError) -> RenderError
fn from(e: TemplateError) -> RenderError
Converts to this type from the input type.