diff --git a/src/parser/parser.rs b/src/parser/parser.rs
index 9e70e8c..32da594 100644
--- a/src/parser/parser.rs
+++ b/src/parser/parser.rs
@@ -224,12 +224,21 @@ fn dust_tag(i: &str) -> IResult<&str, DustTag> {
         named_block("{+", DustTag::DTBlock),
         named_block("{<", DustTag::DTInlinePartial),
         partial("{>", DustTag::DTPartial),
-        parameterized_block("{@", "gte", DustTag::DTHelperGreaterThanOrEquals),
-        parameterized_block("{@", "lte", DustTag::DTHelperLessThanOrEquals),
-        parameterized_block("{@", "eq", DustTag::DTHelperEquals),
-        parameterized_block("{@", "ne", DustTag::DTHelperNotEquals),
-        parameterized_block("{@", "gt", DustTag::DTHelperGreaterThan),
-        parameterized_block("{@", "lt", DustTag::DTHelperLessThan),
+        map(
+            parameterized_block("{@", "gte"),
+            DustTag::DTHelperGreaterThanOrEquals,
+        ),
+        map(
+            parameterized_block("{@", "lte"),
+            DustTag::DTHelperLessThanOrEquals,
+        ),
+        map(parameterized_block("{@", "eq"), DustTag::DTHelperEquals),
+        map(parameterized_block("{@", "ne"), DustTag::DTHelperNotEquals),
+        map(
+            parameterized_block("{@", "gt"),
+            DustTag::DTHelperGreaterThan,
+        ),
+        map(parameterized_block("{@", "lt"), DustTag::DTHelperLessThan),
     ))(i)
 }
 
@@ -460,28 +469,20 @@ where
     }
 }
 
-fn parameterized_block<'a, F>(
+fn parameterized_block<'a>(
     open_matcher: &'static str,
     tag_name: &'static str,
-    constructor: F,
-) -> impl FnMut(&'a str) -> IResult<&'a str, DustTag<'a>>
-where
-    F: Copy + Fn(ParameterizedBlock<'a>) -> DustTag<'a>,
-{
+) -> impl FnMut(&'a str) -> IResult<&'a str, ParameterizedBlock<'a>> {
     alt((
-        parameterized_block_with_body(open_matcher, tag_name, constructor),
-        parameterized_self_closing_block(open_matcher, tag_name, constructor),
+        parameterized_block_with_body(open_matcher, tag_name),
+        parameterized_self_closing_block(open_matcher, tag_name),
     ))
 }
 
-fn parameterized_block_with_body<'a, F>(
+fn parameterized_block_with_body<'a>(
     open_matcher: &'static str,
     tag_name: &'static str,
-    constructor: F,
-) -> impl Fn(&'a str) -> IResult<&'a str, DustTag<'a>>
-where
-    F: Fn(ParameterizedBlock<'a>) -> DustTag<'a>,
-{
+) -> impl Fn(&'a str) -> IResult<&'a str, ParameterizedBlock<'a>> {
     move |i: &'a str| {
         let (i, (name, maybe_explicit_context, params, inner, maybe_else, _closing_name)) =
             tuple((
@@ -502,25 +503,21 @@ where
 
         Ok((
             i,
-            constructor(ParameterizedBlock {
+            ParameterizedBlock {
                 name: name,
                 explicit_context: maybe_explicit_context,
                 params: params.unwrap_or(Vec::new()),
                 contents: inner,
                 else_contents: maybe_else.flatten(),
-            }),
+            },
         ))
     }
 }
 
-fn parameterized_self_closing_block<'a, F>(
+fn parameterized_self_closing_block<'a>(
     open_matcher: &'static str,
     tag_name: &'static str,
-    constructor: F,
-) -> impl Fn(&'a str) -> IResult<&'a str, DustTag<'a>>
-where
-    F: Fn(ParameterizedBlock<'a>) -> DustTag<'a>,
-{
+) -> impl Fn(&'a str) -> IResult<&'a str, ParameterizedBlock<'a>> {
     move |i: &'a str| {
         let (i, (name, maybe_explicit_context, params)) = delimited(
             tag(open_matcher),
@@ -538,13 +535,13 @@ where
 
         Ok((
             i,
-            constructor(ParameterizedBlock {
+            ParameterizedBlock {
                 name: name,
                 explicit_context: maybe_explicit_context,
                 params: params.unwrap_or(Vec::new()),
                 contents: None,
                 else_contents: None,
-            }),
+            },
         ))
     }
 }