separated markup and util crates, no more errors

code_markup/src/markup_error.rs

@@ -0,0 +1,56 @@
+
+use roc_utils::util_error::UtilError;
+use snafu::{Backtrace, NoneError, Snafu, ResultExt};
+
+use crate::slow_pool::MarkNodeId;
+
+#[derive(Debug, Snafu)]
+#[snafu(visibility(pub))]
+pub enum MarkError {
+    #[snafu(display(
+        "CaretNotFound: No carets were found in the expected node with id {}",
+        node_id
+    ))]
+    CaretNotFound {
+        node_id: MarkNodeId,
+        backtrace: Backtrace,
+    },
+    #[snafu(display(
+        "ExpectedTextNode: the function {} expected a Text node, got {} instead.",
+        function_name,
+        node_type
+    ))]
+    ExpectedTextNode {
+        function_name: String,
+        node_type: String,
+        backtrace: Backtrace,
+    },
+    #[snafu(display("NestedNodeMissingChild: expected to find child with id {} in Nested MarkupNode, but it was missing. Id's of the children are {:?}.", node_id, children_ids))]
+    NestedNodeMissingChild {
+        node_id: MarkNodeId,
+        children_ids: Vec<MarkNodeId>,
+        backtrace: Backtrace,
+    },
+    #[snafu(display(
+        "NestedNodeRequired: required a Nested node at this position, node was a {}.",
+        node_type
+    ))]
+    NestedNodeRequired {
+        node_type: String,
+        backtrace: Backtrace,
+    },
+    #[snafu(display("UIError: {}", msg))]
+    UtilErrorBacktrace { msg: String, backtrace: Backtrace },
+}
+
+pub type MarkResult<T, E = MarkError> = std::result::Result<T, E>;
+
+impl From<UtilError> for MarkError {
+    fn from(util_err: UtilError) -> Self {
+        let msg = format!("{}", util_err);
+
+        // hack to handle MarkError derive
+        let dummy_res: Result<(), NoneError> = Err(NoneError {});
+        dummy_res.context(UtilErrorBacktrace { msg }).unwrap_err()
+    }
+}