tests, also the parser is broken for empty arrays

Author: benlubas

src/metadata/mod.rs

@@ -77,6 +77,18 @@ mod tests {
               5
               -5
               6.02e27
+              nil
+              {
+                x: y
+                a: [
+                  b
+                ]
+              }
+              []
+              [
+                hi
+                hi
+              ]
             ]",
         ]
         .into_iter()

src/metadata/snapshots/rust_norg__metadata__tests__arrays.snap

@@ -18,3 +18,10 @@ expression: examples
         - Num: 5
         - Num: -5
         - Num: 6020000000000000000000000000
+        - Nil
+        - Object:
+            a:
+              Array:
+                - Str: b
+            x:
+              Str: y

src/metadata/stage_1.rs

@@ -78,7 +78,12 @@ pub fn meta_parser() -> impl Parser<char, NorgMeta, Error = Simple<char>> {
                     Ok(s.to_string())
                 }
             })
-            .labelled("string");
+            .map(|s| match &s[..] {
+                "true" => NorgMeta::Bool(true),
+                "false" => NorgMeta::Bool(false),
+                "nil" => NorgMeta::Nil,
+                _ => NorgMeta::Str(s),
+            });
 
         let key = none_of(SPECIAL)
             .repeated()
@@ -97,6 +102,11 @@ pub fn meta_parser() -> impl Parser<char, NorgMeta, Error = Simple<char>> {
             .map(NorgMeta::Array)
             .labelled("array");
 
+        let empty_array = empty()
+            .padded()
+            .delimited_by(just('['), just(']'))
+            .to(NorgMeta::Array(vec![]));
+
         let property = key
             .clone()
             .then_ignore(one_of(" \n\t").or_not())
@@ -115,14 +125,12 @@ pub fn meta_parser() -> impl Parser<char, NorgMeta, Error = Simple<char>> {
             .labelled("object");
 
         choice((
-            just("nil").to(NorgMeta::Nil).labelled("nil"),
-            just("true").to(NorgMeta::Bool(true)).labelled("true"),
-            just("false").to(NorgMeta::Bool(false)).labelled("false"),
             number.map(NorgMeta::Num),
             key.then_ignore(just('\n')).map(NorgMeta::EmptyKey),
+            empty_array,
             array,
             object,
-            string.map(NorgMeta::Str),
+            string,
         ))
         .recover_with(nested_delimiters('{', '}', [('[', ']')], |_| {
             NorgMeta::Invalid

test.txt

@@ -1,19 +1,9 @@
-key: value
-obj: {
-  x: y
-  a: [
-    b: c
-  ]
+x: {
+
+  v: hi
+
+  x:
+  hi: there
 }
-arr: [
-  x
-  {
-    k: v
-  }
-]
-h: i
-a: 1
-b: 7
-x: 2024-10-15:1000:15:10.000
-y:
-z:
+a: []
+hi: there