Add for loop

Signed-off-by: Marcel Müller <neikos@neikos.email>

src/lib.rs

@@ -1,19 +1,19 @@
-use std::collections::BTreeMap;
 use std::collections::HashMap;
 
 use displaydoc::Display;
-use serde::Serialize;
 use thiserror::Error;
 
-use crate::emit::Instruction;
 use crate::emit::VMInstructions;
 use crate::input::NomoInput;
+use crate::value::NomoValue;
+use crate::value::NomoValueError;
 
 pub mod ast;
 pub mod emit;
 pub mod eval;
 pub mod input;
 pub mod parser;
+pub mod value;
 
 #[derive(Debug, Error, Display)]
 pub enum NomoError {
@@ -89,7 +89,7 @@ struct Template {
 }
 
 pub struct Context {
-    values: BTreeMap<String, serde_json::Value>,
+    values: HashMap<String, NomoValue>,
 }
 
 impl Default for Context {
@@ -101,23 +101,26 @@ impl Default for Context {
 impl Context {
     pub fn new() -> Context {
         Context {
-            values: BTreeMap::new(),
+            values: HashMap::new(),
         }
     }
 
     pub fn try_insert(
         &mut self,
         key: impl Into<String>,
-        value: impl Serialize,
-    ) -> Result<(), serde_json::Error> {
-        self.values.insert(key.into(), serde_json::to_value(value)?);
+        value: impl TryInto<NomoValue, Error = NomoValueError>,
+    ) -> Result<(), NomoValueError> {
+        self.values.insert(key.into(), value.try_into()?);
 
         Ok(())
     }
 
-    pub fn insert(&mut self, key: impl Into<String>, value: impl Serialize) {
-        self.try_insert(key, value)
-            .expect("inserted value should serialize without error");
+    pub fn insert(&mut self, key: impl Into<String>, value: impl Into<NomoValue>) {
+        self.values.insert(key.into(), value.into());
+    }
+
+    pub fn values(&self) -> &HashMap<String, NomoValue> {
+        &self.values
     }
 }