1 files changed, 82 insertions, 0 deletions
diff --git a/src/runtime/errors.ts b/src/runtime/errors.ts
new file mode 100644
index 000000000..ad54cc322
--- /dev/null
+++ b/src/runtime/errors.ts
@@ -0,0 +1,82 @@
+var __BuildError;
+var __ResolveError;
+var __ImportKind;
+{
+  enum ImportKind {
+    entry_point = 0,
+    stmt = 1,
+    require = 2,
+    dynamic = 3,
+    require_resolve = 4,
+    at = 5,
+    at_conditional = 6,
+    url = 7,
+  }
+
+  type ErrorPosition = {
+    file: string;
+    namespace: string;
+    line: number; // 1-based
+    column: number; // 0-based, byte offset relative to lineText
+    length: number; // in bytes
+    /** line of text, possibly empty */
+    lineText: string;
+    /** byte offset relative to the start of the file */
+    offset: number;
+  };
+
+  interface BuildErrorImplementation {
+    position: ErrorPosition;
+    name: string;
+    message: string;
+  }
+
+  interface ResolveErrorImplementation extends BuildErrorImplementation {
+    specifier: string;
+    importKind: ImportKind;
+  }
+
+  class BuildError extends Error {
+    constructor(data: BuildErrorImplementation) {
+      super(data.message);
+      this.name = data.name;
+      this.data = data;
+    }
+    data: BuildErrorImplementation;
+
+    get position() {
+      return this.data.position;
+    }
+
+    get [Symbol.toStringTag]() {
+      return `${this.name}: ${this.message}`;
+    }
+  }
+
+  class ResolveError extends BuildError {
+    constructor(data: ResolveErrorImplementation) {
+      super(data);
+      this.name = data.name;
+      this.data = data;
+    }
+    data: ResolveErrorImplementation;
+
+    get importKind() {
+      return this.data.importKind;
+    }
+
+    get specifier() {
+      return this.data.specifier || "";
+    }
+  }
+
+  __ResolveError = ResolveError;
+  __BuildError = BuildError;
+  __ImportKind = ImportKind;
+}
+
+export {
+  __ResolveError as ResolveError,
+  __BuildError as BuildError,
+  __ImportKind as ImportKind,
+};