Add unknown ranges and open object values

crates/decodal-core/examples/structured_import.rs

@@ -1,6 +1,4 @@
-use decodal::{
-    Data, Diagnostic, DiagnosticKind, Engine, HostValue, ImportLoader, LoadedImport, Span,
-};
+use decodal::{Data, Diagnostic, DiagnosticKind, Engine, ImportLoader, LoadedImport, Span, Value};
 
 const POST: &str = r#"---
 title: Hello
@@ -33,22 +31,22 @@ impl ImportLoader for ContentLoader {
     }
 }
 
-fn parse_markdown(source: &str) -> decodal::Result<HostValue> {
+fn parse_markdown(source: &str) -> decodal::Result<Value> {
     let source = source.strip_prefix("---\n").ok_or_else(frontmatter_error)?;
     let (frontmatter, body) = source.split_once("\n---\n").ok_or_else(frontmatter_error)?;
     let mut fields = Vec::new();
     for line in frontmatter.lines() {
         let (name, value) = line.split_once(':').ok_or_else(frontmatter_error)?;
         let value = match value.trim() {
-            "true" => HostValue::bool(true),
-            "false" => HostValue::bool(false),
-            value => HostValue::string(value),
+            "true" => Value::bool(true),
+            "false" => Value::bool(false),
+            value => Value::string(value),
         };
         fields.push((name.trim(), value));
     }
-    Ok(HostValue::object([
-        ("frontmatter", HostValue::object(fields)),
-        ("body", HostValue::string(body)),
+    Ok(Value::object([
+        ("frontmatter", Value::object(fields)),
+        ("body", Value::string(body)),
     ]))
 }