separate typed and untyped ASTs

src/typing/error.rs

@@ -0,0 +1,92 @@
+use crate::typing::{BinaryOperator, Identifier, ModulePath, Type, TypeContext};
+
+#[derive(Debug)]
+pub struct TypeError {
+    file: Option<std::path::PathBuf>,
+    module: ModulePath,
+    function: Option<String>,
+    kind: TypeErrorKind,
+}
+
+impl std::fmt::Display for TypeError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str("Error\n")?;
+        if let Some(path) = &self.file {
+            f.write_fmt(format_args!(" in file {}\n", path.display()))?;
+        }
+        f.write_fmt(format_args!(" in module {}\n", self.module))?;
+        if let Some(name) = &self.function {
+            f.write_fmt(format_args!(" in function {}\n", name))?;
+        }
+        f.write_fmt(format_args!("{:#?}", self.kind))?;
+        Ok(())
+    }
+}
+
+#[derive(Default)]
+pub struct TypeErrorBuilder {
+    file: Option<std::path::PathBuf>,
+    module: Option<ModulePath>,
+    function: Option<String>,
+    kind: Option<TypeErrorKind>,
+}
+
+impl TypeError {
+    pub fn builder() -> TypeErrorBuilder {
+        TypeErrorBuilder::default()
+    }
+}
+
+impl TypeErrorBuilder {
+    pub fn context(mut self, ctx: &TypeContext) -> Self {
+        self.file = ctx.file.clone();
+        self.module = Some(ctx.module.clone());
+        self.function = ctx.function.clone();
+        self
+    }
+
+    pub fn kind(mut self, kind: TypeErrorKind) -> Self {
+        self.kind = Some(kind);
+        self
+    }
+
+    pub fn build(self) -> TypeError {
+        TypeError {
+            file: self.file,
+            module: self.module.expect("TypeError builder is missing module"),
+            function: self.function,
+            kind: self.kind.expect("TypeError builder is missing kind"),
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum TypeErrorKind {
+    InvalidBinaryOperator {
+        operator: BinaryOperator,
+        lht: Type,
+        rht: Type,
+    },
+    BlockTypeDoesNotMatchFunctionType {
+        block_type: Type,
+        function_type: Type,
+    },
+    ReturnTypeDoesNotMatchFunctionType {
+        function_type: Type,
+        return_type: Type,
+    },
+    UnknownIdentifier {
+        identifier: String,
+    },
+    AssignmentMismatch {
+        lht: Type,
+        rht: Type,
+    },
+    AssignUndeclared,
+    VariableRedeclaration,
+    ReturnStatementsMismatch,
+    UnknownFunctionCalled(Identifier),
+    WrongFunctionArguments,
+    ConditionIsNotBool,
+    IfElseMismatch,
+}