Start of making ignored whitespace a top-level template element to handle it in a more generic fashion.

src/parser/parser.rs

@@ -53,6 +53,11 @@ pub enum Special {
     RightCurlyBrace,
 }
 
+#[derive(Clone, Debug, PartialEq)]
+pub enum IgnoredWhitespace<'a> {
+    StartOfLine(&'a str),
+}
+
 #[derive(Clone, Debug, PartialEq)]
 pub struct Comment<'a> {
     value: &'a str,
@@ -141,6 +146,7 @@ pub struct Template<'a> {
 pub enum TemplateElement<'a> {
     TESpan(Span<'a>),
     TETag(DustTag<'a>),
+    TEIgnoredWhitespace(IgnoredWhitespace<'a>),
 }
 
 /// Any element significant to dust that isn't plain text
@@ -478,10 +484,9 @@ fn filter(i: &str) -> IResult<&str, Filter> {
     )(i)
 }
 
-/// Whitespace at the beginning of lines is ignored so inside a span
-/// we are matching a newline character followed by as much contiguous
-/// whitespace as possible, all of which will be thrown away by other
-/// parsers.
+/// Whitespace at the beginning of lines is ignored so we are matching
+/// a newline character followed by as much contiguous whitespace as
+/// possible, all of which will be thrown away by other parsers.
 fn span_end_of_line(i: &str) -> IResult<&str, (&str, &str)> {
     tuple((line_ending, multispace0))(i)
 }