Move value to own file

examples/test.rs

@@ -1,5 +1,5 @@
 use ferrite_lua::{
-    compile,
+    compile, value,
     vm::{self, RuntimeError, RustFunction, VirtualMachine},
 };
 
@@ -8,12 +8,12 @@ static TEST: &str = include_str!("../examples/test.lua");
 #[derive(Debug, PartialEq, Eq)]
 pub struct Max;
 impl RustFunction for Max {
-    fn execute(&self, parameters: Vec<vm::Value>) -> Result<Vec<vm::Value>, RuntimeError> {
-        let lhs = parameters.get(0).cloned().unwrap_or(vm::Value::Nil);
-        let rhs = parameters.get(1).cloned().unwrap_or(vm::Value::Nil);
+    fn execute(&self, parameters: Vec<value::Value>) -> Result<Vec<value::Value>, RuntimeError> {
+        let lhs = parameters.get(0).cloned().unwrap_or(value::Value::Nil);
+        let rhs = parameters.get(1).cloned().unwrap_or(value::Value::Nil);
         match lhs.lt(&rhs)? {
-            vm::Value::Boolean(value) => Ok(vec![if value.0 { rhs } else { lhs }]),
-            _ => Ok(vec![vm::Value::Nil]),
+            value::Value::Boolean(value) => Ok(vec![if value.0 { rhs } else { lhs }]),
+            _ => Ok(vec![value::Value::Nil]),
         }
     }
 
@@ -24,7 +24,7 @@ impl RustFunction for Max {
 #[derive(Debug, PartialEq, Eq)]
 pub struct Print;
 impl RustFunction for Print {
-    fn execute(&self, parameters: Vec<vm::Value>) -> Result<Vec<vm::Value>, RuntimeError> {
+    fn execute(&self, parameters: Vec<value::Value>) -> Result<Vec<value::Value>, RuntimeError> {
         println!("{:?}", parameters);
         Ok(Vec::new())
     }

src/lib.rs

@@ -1,11 +1,11 @@
 //! Usage example:
 //! ```rust
-//! use ferrite_lua::{compile, vm};
+//! use ferrite_lua::{compile, vm, value};
 //!
 //! #[derive(Debug, PartialEq, Eq)]
 //! pub struct Print;
 //! impl vm::RustFunction for Print {
-//!     fn execute(&self, parameters: Vec<vm::Value>) -> Result<Vec<vm::Value>, vm::RuntimeError> {
+//!     fn execute(&self, parameters: Vec<value::Value>) -> Result<Vec<value::Value>, vm::RuntimeError> {
 //!         println!("{:?}", parameters);
 //!         Ok(Vec::new())
 //!     }
@@ -42,6 +42,7 @@ use crate::{
 mod ast;
 mod compile;
 mod token_stream;
+pub mod value;
 pub mod vm;
 
 #[derive(Error, Debug)]

src/value.rs

@@ -0,0 +1,250 @@
+use std::{cell::RefCell, collections::HashMap, fmt::Debug, rc::Rc};
+
+use crate::{
+    ast::{BinaryOperator, UnaryOperator},
+    vm::{Closure, LuaBool, LuaFloat, LuaInteger, RuntimeError, RustFunction, VMFloat},
+};
+
+#[derive(Clone)]
+pub enum Value {
+    String(String),
+    Float(VMFloat),
+    Integer(LuaInteger),
+    Boolean(LuaBool),
+    RustFunction(Rc<RefCell<dyn RustFunction>>),
+    Function(Closure),
+    Nil,
+    Table(Rc<RefCell<HashMap<IndexableValue, Value>>>),
+}
+
+impl Value {
+    pub fn as_indexable(self) -> Result<IndexableValue, RuntimeError> {
+        match self {
+            Value::String(value) => Ok(IndexableValue::String(value)),
+            Value::Float(value) => Ok(IndexableValue::Float(value)),
+            Value::Integer(value) => Ok(IndexableValue::Integer(value)),
+            Value::Boolean(value) => Ok(IndexableValue::Bool(value)),
+            Value::RustFunction(value) => {
+                Ok(IndexableValue::RustFunction(value.borrow().as_indexable()))
+            }
+            Value::Function(closure) => Ok(IndexableValue::Function(closure.prototype)),
+            Value::Nil => Err(RuntimeError::InvalidTableIndex(self)),
+            Value::Table(_) => Err(RuntimeError::InvalidTableIndex(self)),
+        }
+    }
+
+    pub fn as_float(&self) -> Result<LuaFloat, RuntimeError> {
+        match self {
+            Value::Float(vmfloat) => Ok(vmfloat.lua_number()),
+            Value::Integer(lua_integer) => Ok(lua_integer.into()),
+            Value::Boolean(lua_boolean) => Ok(LuaFloat(lua_boolean.0 as u64 as f64)),
+            _ => Err(RuntimeError::NotFloatable(self.clone())),
+        }
+    }
+
+    pub fn as_integer(&self) -> Result<LuaInteger, RuntimeError> {
+        match self {
+            Value::Integer(lua_integer) => Ok(*lua_integer),
+            Value::Boolean(lua_boolean) => Ok(LuaInteger(lua_boolean.0 as i64)),
+            _ => Err(RuntimeError::NotFloatable(self.clone())),
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Hash, Clone, Ord, PartialOrd)]
+pub enum IndexableValue {
+    String(String),
+    Float(VMFloat),
+    Integer(LuaInteger),
+    Bool(LuaBool),
+    RustFunction(String),
+    Function(u32),
+}
+
+impl Value {
+    pub fn add(&self, other: &Value) -> Result<Value, RuntimeError> {
+        match (self, other) {
+            (Value::Integer(_) | Value::Boolean(_), Value::Integer(_) | Value::Boolean(_)) => {
+                let res = LuaInteger(self.as_integer()?.0 + other.as_integer()?.0);
+                Ok(Value::Integer(res))
+            }
+            (
+                Value::Float(_) | Value::Integer(_) | Value::Boolean(_),
+                Value::Float(_) | Value::Integer(_) | Value::Boolean(_),
+            ) => {
+                let res = LuaFloat(self.as_float()?.0 + other.as_float()?.0);
+                Ok(Value::Float(res.vm_number()))
+            }
+            _ => Err(RuntimeError::InvalidOperands(
+                BinaryOperator::Add,
+                self.clone(),
+                other.clone(),
+            )),
+        }
+    }
+
+    pub fn eq(&self, other: &Value) -> Result<Value, RuntimeError> {
+        match (self, other) {
+            (Value::Integer(lhs), Value::Integer(rhs)) => {
+                Ok(Value::Boolean(LuaBool(lhs.0 == rhs.0)))
+            }
+            (Value::Float(_) | Value::Integer(_), Value::Float(_) | Value::Integer(_)) => {
+                let res = LuaBool(self.as_float()?.0 == other.as_float()?.0);
+                Ok(Value::Boolean(res))
+            }
+            (Value::Nil, Value::Nil) => Ok(Value::Boolean(LuaBool(true))),
+            (Value::Nil, _) | (_, Value::Nil) => Ok(Value::Boolean(LuaBool(false))),
+            _ => Ok(Value::Boolean(LuaBool(
+                self.clone().as_indexable()? == other.clone().as_indexable()?,
+            ))),
+        }
+    }
+
+    pub fn lt(&self, other: &Value) -> Result<Value, RuntimeError> {
+        match (self, other) {
+            (Value::Integer(lhs), Value::Integer(rhs)) => {
+                Ok(Value::Boolean(LuaBool(lhs.0 < rhs.0)))
+            }
+            (Value::Float(_) | Value::Integer(_), Value::Float(_) | Value::Integer(_)) => {
+                let res = LuaBool(self.as_float()?.0 < other.as_float()?.0);
+                Ok(Value::Boolean(res))
+            }
+            _ => Err(RuntimeError::InvalidOperands(
+                BinaryOperator::LessThan,
+                self.clone(),
+                other.clone(),
+            )),
+        }
+    }
+
+    pub fn lte(&self, other: &Value) -> Result<Value, RuntimeError> {
+        match (self, other) {
+            (Value::Integer(lhs), Value::Integer(rhs)) => {
+                Ok(Value::Boolean(LuaBool(lhs.0 <= rhs.0)))
+            }
+            (Value::Float(_) | Value::Integer(_), Value::Float(_) | Value::Integer(_)) => {
+                let res = LuaBool(self.as_float()?.0 <= other.as_float()?.0);
+                Ok(Value::Boolean(res))
+            }
+            _ => Err(RuntimeError::InvalidOperands(
+                BinaryOperator::LessThanOrEqual,
+                self.clone(),
+                other.clone(),
+            )),
+        }
+    }
+
+    pub fn unm(&self) -> Result<Value, RuntimeError> {
+        match self {
+            Value::Integer(lhs) => {
+                let res = LuaInteger(-lhs.0);
+                Ok(Value::Integer(res))
+            }
+            Value::Float(lhs) => {
+                let res = LuaFloat(-lhs.lua_number().0);
+                Ok(Value::Float(res.vm_number()))
+            }
+            Value::Boolean(val) => {
+                let res = LuaBool(!val.0);
+                Ok(Value::Boolean(res))
+            }
+            _ => Err(RuntimeError::InvalidOperand(
+                UnaryOperator::Negation,
+                self.clone(),
+            )),
+        }
+    }
+
+    pub fn len(&self) -> Result<Value, RuntimeError> {
+        match self {
+            Value::String(value) => Ok(Self::Integer(LuaInteger(value.len() as i64))),
+            Value::Table(table) => {
+                let table = table.borrow();
+                let mut int_indexes = table
+                    .keys()
+                    .filter(|v| match v {
+                        IndexableValue::Integer(_) => true,
+                        _ => false,
+                    })
+                    .map(|v| match v {
+                        IndexableValue::Integer(int) => int.0,
+                        _ => panic!(),
+                    })
+                    .collect::<Vec<_>>();
+                int_indexes.push(0);
+                int_indexes.sort();
+
+                for idx in int_indexes {
+                    let idx_value = table.get(&IndexableValue::Integer(LuaInteger(idx)));
+                    let idx_value_after = idx
+                        .checked_add_unsigned(1)
+                        .and_then(|i| table.get(&IndexableValue::Integer(LuaInteger(i))));
+
+                    // Directly from https://www.lua.org/manual/5.5/manual.html#3.4.7
+                    if (idx == 0 || idx_value.is_some()) && idx_value_after.is_none() {
+                        return Ok(Self::Integer(LuaInteger(idx)));
+                    }
+                }
+                panic!()
+            }
+            Value::Float(_) => Err(RuntimeError::NotLengthable(self.clone())),
+            Value::Integer(_) => Err(RuntimeError::NotLengthable(self.clone())),
+            Value::Boolean(_) => Err(RuntimeError::NotLengthable(self.clone())),
+            Value::RustFunction(_) => Err(RuntimeError::NotLengthable(self.clone())),
+            Value::Function(_) => Err(RuntimeError::NotLengthable(self.clone())),
+            Value::Nil => Err(RuntimeError::NotLengthable(self.clone())),
+        }
+    }
+
+    pub fn and(&self, other: &Value) -> Result<Value, RuntimeError> {
+        if self.is_truthy() {
+            Ok(self.clone())
+        } else {
+            Ok(other.clone())
+        }
+    }
+
+    pub fn or(&self, other: &Value) -> Result<Value, RuntimeError> {
+        if self.is_truthy() {
+            Ok(self.clone())
+        } else {
+            Ok(other.clone())
+        }
+    }
+
+    pub fn is_truthy(&self) -> bool {
+        match self {
+            Value::String(_) => true,
+            Value::Float(_) => true,
+            Value::Integer(_) => true,
+            Value::Boolean(lua_bool) => lua_bool.0,
+            Value::RustFunction(_) => true,
+            Value::Function(_) => true,
+            Value::Nil => false,
+            Value::Table(_) => true,
+        }
+    }
+}
+
+impl Debug for Value {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Value::Float(arg0) => f.debug_tuple("Float").field(&arg0.lua_number()).finish(),
+            Value::Integer(arg0) => f.debug_tuple("Integer").field(arg0).finish(),
+            Value::Boolean(arg0) => f.debug_tuple("Boolean").field(arg0).finish(),
+            Value::String(value) => f.debug_tuple("String").field(value).finish(),
+            Value::RustFunction(arg0) => f.debug_tuple("RustFunction").field(arg0).finish(),
+            Value::Function(closure) => f
+                .debug_tuple(&format!("Function({})", closure.prototype))
+                .finish(),
+            Value::Nil => write!(f, "Nil"),
+            Value::Table(hash_map) => {
+                let mut table = f.debug_struct("Table");
+                for (key, value) in hash_map.borrow().iter() {
+                    table.field(&format!("{:?}", key), value);
+                }
+                table.finish()
+            }
+        }
+    }
+}

src/vm.rs

@@ -5,6 +5,7 @@ use std::{cell::RefCell, collections::HashMap, fmt::Debug, hash::Hash, rc::Rc};
 use crate::{
     CompilationUnit,
     ast::{BinaryOperator, UnaryOperator},
+    value::{IndexableValue, Value},
 };
 
 #[derive(Clone, Hash, PartialEq, Eq, Copy, PartialOrd, Ord)]
@@ -269,250 +270,6 @@ impl Environment {
     }
 }
 
-#[derive(Clone)]
-pub enum Value {
-    String(String),
-    Float(VMFloat),
-    Integer(LuaInteger),
-    Boolean(LuaBool),
-    RustFunction(Rc<RefCell<dyn RustFunction>>),
-    Function(Closure),
-    Nil,
-    Table(Rc<RefCell<HashMap<IndexableValue, Value>>>),
-}
-
-impl Value {
-    pub fn as_indexable(self) -> Result<IndexableValue, RuntimeError> {
-        match self {
-            Value::String(value) => Ok(IndexableValue::String(value)),
-            Value::Float(value) => Ok(IndexableValue::Float(value)),
-            Value::Integer(value) => Ok(IndexableValue::Integer(value)),
-            Value::Boolean(value) => Ok(IndexableValue::Bool(value)),
-            Value::RustFunction(value) => {
-                Ok(IndexableValue::RustFunction(value.borrow().as_indexable()))
-            }
-            Value::Function(closure) => Ok(IndexableValue::Function(closure.prototype)),
-            Value::Nil => Err(RuntimeError::InvalidTableIndex(self)),
-            Value::Table(_) => Err(RuntimeError::InvalidTableIndex(self)),
-        }
-    }
-
-    pub fn as_float(&self) -> Result<LuaFloat, RuntimeError> {
-        match self {
-            Value::Float(vmfloat) => Ok(vmfloat.lua_number()),
-            Value::Integer(lua_integer) => Ok(lua_integer.into()),
-            Value::Boolean(lua_boolean) => Ok(LuaFloat(lua_boolean.0 as u64 as f64)),
-            _ => Err(RuntimeError::NotFloatable(self.clone())),
-        }
-    }
-
-    pub fn as_integer(&self) -> Result<LuaInteger, RuntimeError> {
-        match self {
-            Value::Integer(lua_integer) => Ok(*lua_integer),
-            Value::Boolean(lua_boolean) => Ok(LuaInteger(lua_boolean.0 as i64)),
-            _ => Err(RuntimeError::NotFloatable(self.clone())),
-        }
-    }
-}
-
-#[derive(Debug, PartialEq, Eq, Hash, Clone, Ord, PartialOrd)]
-pub enum IndexableValue {
-    String(String),
-    Float(VMFloat),
-    Integer(LuaInteger),
-    Bool(LuaBool),
-    RustFunction(String),
-    Function(u32),
-}
-
-impl Value {
-    pub fn add(&self, other: &Value) -> Result<Value, RuntimeError> {
-        match (self, other) {
-            (Value::Integer(_) | Value::Boolean(_), Value::Integer(_) | Value::Boolean(_)) => {
-                let res = LuaInteger(self.as_integer()?.0 + other.as_integer()?.0);
-                Ok(Value::Integer(res))
-            }
-            (
-                Value::Float(_) | Value::Integer(_) | Value::Boolean(_),
-                Value::Float(_) | Value::Integer(_) | Value::Boolean(_),
-            ) => {
-                let res = LuaFloat(self.as_float()?.0 + other.as_float()?.0);
-                Ok(Value::Float(res.vm_number()))
-            }
-            _ => Err(RuntimeError::InvalidOperands(
-                BinaryOperator::Add,
-                self.clone(),
-                other.clone(),
-            )),
-        }
-    }
-
-    pub fn eq(&self, other: &Value) -> Result<Value, RuntimeError> {
-        match (self, other) {
-            (Value::Integer(lhs), Value::Integer(rhs)) => {
-                Ok(Value::Boolean(LuaBool(lhs.0 == rhs.0)))
-            }
-            (Value::Float(_) | Value::Integer(_), Value::Float(_) | Value::Integer(_)) => {
-                let res = LuaBool(self.as_float()?.0 == other.as_float()?.0);
-                Ok(Value::Boolean(res))
-            }
-            (Value::Nil, Value::Nil) => Ok(Value::Boolean(LuaBool(true))),
-            (Value::Nil, _) | (_, Value::Nil) => Ok(Value::Boolean(LuaBool(false))),
-            _ => Ok(Value::Boolean(LuaBool(
-                self.clone().as_indexable()? == other.clone().as_indexable()?,
-            ))),
-        }
-    }
-
-    pub fn lt(&self, other: &Value) -> Result<Value, RuntimeError> {
-        match (self, other) {
-            (Value::Integer(lhs), Value::Integer(rhs)) => {
-                Ok(Value::Boolean(LuaBool(lhs.0 < rhs.0)))
-            }
-            (Value::Float(_) | Value::Integer(_), Value::Float(_) | Value::Integer(_)) => {
-                let res = LuaBool(self.as_float()?.0 < other.as_float()?.0);
-                Ok(Value::Boolean(res))
-            }
-            _ => Err(RuntimeError::InvalidOperands(
-                BinaryOperator::LessThan,
-                self.clone(),
-                other.clone(),
-            )),
-        }
-    }
-
-    pub fn lte(&self, other: &Value) -> Result<Value, RuntimeError> {
-        match (self, other) {
-            (Value::Integer(lhs), Value::Integer(rhs)) => {
-                Ok(Value::Boolean(LuaBool(lhs.0 <= rhs.0)))
-            }
-            (Value::Float(_) | Value::Integer(_), Value::Float(_) | Value::Integer(_)) => {
-                let res = LuaBool(self.as_float()?.0 <= other.as_float()?.0);
-                Ok(Value::Boolean(res))
-            }
-            _ => Err(RuntimeError::InvalidOperands(
-                BinaryOperator::LessThanOrEqual,
-                self.clone(),
-                other.clone(),
-            )),
-        }
-    }
-
-    pub fn unm(&self) -> Result<Value, RuntimeError> {
-        match self {
-            Value::Integer(lhs) => {
-                let res = LuaInteger(-lhs.0);
-                Ok(Value::Integer(res))
-            }
-            Value::Float(lhs) => {
-                let res = LuaFloat(-lhs.lua_number().0);
-                Ok(Value::Float(res.vm_number()))
-            }
-            Value::Boolean(val) => {
-                let res = LuaBool(!val.0);
-                Ok(Value::Boolean(res))
-            }
-            _ => Err(RuntimeError::InvalidOperand(
-                UnaryOperator::Negation,
-                self.clone(),
-            )),
-        }
-    }
-
-    pub fn len(&self) -> Result<Value, RuntimeError> {
-        match self {
-            Value::String(value) => Ok(Self::Integer(LuaInteger(value.len() as i64))),
-            Value::Table(table) => {
-                let table = table.borrow();
-                let mut int_indexes = table
-                    .keys()
-                    .filter(|v| match v {
-                        IndexableValue::Integer(_) => true,
-                        _ => false,
-                    })
-                    .map(|v| match v {
-                        IndexableValue::Integer(int) => int.0,
-                        _ => panic!(),
-                    })
-                    .collect::<Vec<_>>();
-                int_indexes.push(0);
-                int_indexes.sort();
-
-                for idx in int_indexes {
-                    let idx_value = table.get(&IndexableValue::Integer(LuaInteger(idx)));
-                    let idx_value_after = idx
-                        .checked_add_unsigned(1)
-                        .and_then(|i| table.get(&IndexableValue::Integer(LuaInteger(i))));
-
-                    // Directly from https://www.lua.org/manual/5.5/manual.html#3.4.7
-                    if (idx == 0 || idx_value.is_some()) && idx_value_after.is_none() {
-                        return Ok(Self::Integer(LuaInteger(idx)));
-                    }
-                }
-                panic!()
-            }
-            Value::Float(_) => Err(RuntimeError::NotLengthable(self.clone())),
-            Value::Integer(_) => Err(RuntimeError::NotLengthable(self.clone())),
-            Value::Boolean(_) => Err(RuntimeError::NotLengthable(self.clone())),
-            Value::RustFunction(_) => Err(RuntimeError::NotLengthable(self.clone())),
-            Value::Function(_) => Err(RuntimeError::NotLengthable(self.clone())),
-            Value::Nil => Err(RuntimeError::NotLengthable(self.clone())),
-        }
-    }
-
-    pub fn and(&self, other: &Value) -> Result<Value, RuntimeError> {
-        if self.is_truthy() {
-            Ok(self.clone())
-        } else {
-            Ok(other.clone())
-        }
-    }
-
-    pub fn or(&self, other: &Value) -> Result<Value, RuntimeError> {
-        if self.is_truthy() {
-            Ok(self.clone())
-        } else {
-            Ok(other.clone())
-        }
-    }
-
-    pub fn is_truthy(&self) -> bool {
-        match self {
-            Value::String(_) => true,
-            Value::Float(_) => true,
-            Value::Integer(_) => true,
-            Value::Boolean(lua_bool) => lua_bool.0,
-            Value::RustFunction(_) => true,
-            Value::Function(_) => true,
-            Value::Nil => false,
-            Value::Table(_) => true,
-        }
-    }
-}
-
-impl Debug for Value {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Value::Float(arg0) => f.debug_tuple("Float").field(&arg0.lua_number()).finish(),
-            Value::Integer(arg0) => f.debug_tuple("Integer").field(arg0).finish(),
-            Value::Boolean(arg0) => f.debug_tuple("Boolean").field(arg0).finish(),
-            Value::String(value) => f.debug_tuple("String").field(value).finish(),
-            Value::RustFunction(arg0) => f.debug_tuple("RustFunction").field(arg0).finish(),
-            Value::Function(closure) => f
-                .debug_tuple(&format!("Function({})", closure.prototype))
-                .finish(),
-            Value::Nil => write!(f, "Nil"),
-            Value::Table(hash_map) => {
-                let mut table = f.debug_struct("Table");
-                for (key, value) in hash_map.borrow().iter() {
-                    table.field(&format!("{:?}", key), value);
-                }
-                table.finish()
-            }
-        }
-    }
-}
-
 pub trait RustFunction: Debug {
     fn execute(&self, parameters: Vec<Value>) -> Result<Vec<Value>, RuntimeError>;
     fn as_indexable(&self) -> String;
@@ -576,7 +333,7 @@ impl VirtualMachine {
 #[derive(Debug, Clone)]
 pub struct Closure {
     vm: VirtualMachine,
-    prototype: u32,
+    pub(crate) prototype: u32,
     environment: Rc<RefCell<Environment>>,
     upvalues: HashMap<u16, Rc<RefCell<Value>>>,
 }