Add Any type.

dmc-lib/src/ast/call.rs

@@ -97,7 +97,11 @@ impl Call {
         for i in 0..parameters.len() {
             let parameter = &parameters[i];
             let argument = &self.arguments[i];
-            if parameter.borrow().type_info() != &argument.type_info() {
+            if !parameter
+                .borrow()
+                .type_info()
+                .is_assignable_from(&argument.type_info())
+            {
                 diagnostics.push(Diagnostic::new(
                     &format!(
                         "Mismatched types; expected {} but found {}",

dmc-lib/src/ast/parameter.rs

@@ -25,7 +25,7 @@ impl Parameter {
     ) -> Result<Rc<RefCell<ParameterSymbol>>, Vec<Diagnostic>> {
         let insert_result = symbol_table.insert_parameter_symbol(ParameterSymbol::new(
             &self.declared_name,
-            TypeInfo::String, // todo
+            TypeInfo::Any, // todo
         ));
         match insert_result {
             Ok(parameter_symbol) => Ok(parameter_symbol),

dmc-lib/src/type_info.rs

@@ -5,6 +5,7 @@ use std::rc::Rc;
 
 #[derive(Clone)]
 pub enum TypeInfo {
+    Any,
     Integer,
     String,
     Function(Rc<RefCell<FunctionSymbol>>),
@@ -12,32 +13,34 @@ pub enum TypeInfo {
 
 impl Display for TypeInfo {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
-        let s = match self {
-            TypeInfo::Integer => "Int",
-            TypeInfo::String => "String",
-            TypeInfo::Function(_) => "fn", // todo
-        };
-        write!(f, "{}", s)
-    }
-}
-
-impl PartialEq for &TypeInfo {
-    fn eq(&self, other: &Self) -> bool {
         match self {
-            TypeInfo::Integer => match other {
+            TypeInfo::Any => write!(f, "Any"),
-                TypeInfo::Integer => true,
+            TypeInfo::Integer => write!(f, "Int"),
-                _ => false,
+            TypeInfo::String => write!(f, "String"),
-            },
+            TypeInfo::Function(function_symbol) => {
-            TypeInfo::String => match other {
+                write!(f, "fn(")?;
-                TypeInfo::String => true,
+                for parameter in function_symbol.borrow().parameters() {
-                _ => false,
+                    parameter.borrow().type_info().fmt(f)?;
-            },
-            TypeInfo::Function(f0) => match other {
-                TypeInfo::Function(f1) => {
-                    f0.as_ptr() == f1.as_ptr() // todo
                 }
-                _ => false,
+                write!(f, ")")
-            },
+            }
+        }
+    }
+}
+
+impl TypeInfo {
+    pub fn is_assignable_from(&self, other: &TypeInfo) -> bool {
+        match self {
+            TypeInfo::Any => true,
+            TypeInfo::Integer => {
+                matches!(other, TypeInfo::Integer)
+            }
+            TypeInfo::String => {
+                matches!(other, TypeInfo::String)
+            }
+            TypeInfo::Function(_) => {
+                unimplemented!("Type matching on Functions not yet supported.")
+            }
         }
     }
 }