Update for the latest nom and make serde an optional dep.

Cargo.toml

@@ -6,7 +6,7 @@ edition = "2018"
 
 [features]
 default = []
-json-integration = []
+json-integration = ["serde", "serde_json"]
 
 [lib]
 name = "duster"
@@ -19,5 +19,5 @@ required-features = ["json-integration"]
 
 [dependencies]
 nom = { git = "https://github.com/tomalexander/nom.git", branch = "take_until_parser_matches" }
-serde = "1.0.106"
-serde_json = "1.0.51"
+serde = { version = "1.0.106", optional = true }
+serde_json = { version = "1.0.51", optional = true }

src/integrations/json.rs

@@ -0,0 +1,6 @@
+//! This file contains an integration for duster that implements
+//! support for using serde_json values for the render context. This
+//! is in its own separate file to avoid requiring serde as a
+//! dependency since ContextElement can be implemented for any
+//! type. Disable the json-integration feature to avoid compiling this
+//! file and adding the serde and serde_json dependencies.

src/parser/parser.rs

@@ -807,7 +807,10 @@ mod tests {
         assert_eq!(super::special("{~rb}"), Ok(("", Special::RightCurlyBrace)));
         assert_eq!(
             super::special("{~zzz}"),
-            Err(Error(("zzz}", ErrorKind::Tag)))
+            Err(Error(nom::error::Error {
+                input: "zzz}",
+                code: ErrorKind::Tag
+            }))
         );
     }
 
@@ -824,10 +827,10 @@ mod tests {
         );
         assert_eq!(
             super::special("{! this is a comment without a close"),
-            Err(Error((
-                "{! this is a comment without a close",
-                ErrorKind::Tag
-            )))
+            Err(Error(nom::error::Error {
+                input: "{! this is a comment without a close",
+                code: ErrorKind::Tag
+            }))
         );
     }
 
@@ -861,7 +864,10 @@ mod tests {
         );
         assert_eq!(
             super::span("{~lb}"),
-            Err(Error(("{~lb}", ErrorKind::Verify)))
+            Err(Error(nom::error::Error {
+                input: "{~lb}",
+                code: ErrorKind::Verify
+            }))
         );
         assert_eq!(
             super::body("this is       \t   \n\n    \t \n   \t  multiline text\n     {foo}"),
@@ -911,7 +917,10 @@ mod tests {
     fn test_section_mismatched_paths() {
         assert_eq!(
             super::dust_tag("{#foo.bar}{/baz}"),
-            Err(Error(("{#foo.bar}{/baz}", ErrorKind::Tag)))
+            Err(Error(nom::error::Error {
+                input: "{#foo.bar}{/baz}",
+                code: ErrorKind::Tag
+            }))
         );
     }
 
@@ -1539,7 +1548,7 @@ mod tests {
 {.}
 {/names}"
             ),
-            Ok::<_, nom::Err<(&str, ErrorKind)>>((
+            Ok::<_, nom::Err<nom::error::Error<&str>>>((
                 "",
                 Template {
                     contents: Body {
@@ -1613,7 +1622,7 @@ mod tests {
             super::template(
                 r#"{#level3.level4}{>partialtwo v1="b" v2="b" v3="b" v4="b" v5="b" /}{/level3.level4}"#
             ),
-            Ok::<_, nom::Err<(&str, ErrorKind)>>((
+            Ok::<_, nom::Err<nom::error::Error<&str>>>((
                 "",
                 Template {
                     contents: Body {