add component state, top-level await support (#26)

1 files changed, 45 insertions, 0 deletions

diff --git a/src/parser/utils/error.ts b/src/parser/utils/error.ts
new file mode 100644
index 000000000..3c1b23e4c
--- /dev/null
+++ b/src/parser/utils/error.ts
@@ -0,0 +1,45 @@
+// @ts-nocheck
+
+import { locate } from 'locate-character';
+import get_code_frame from './get_code_frame.js';
+
+export class CompileError extends Error {
+  code: string;
+  start: { line: number; column: number };
+  end: { line: number; column: number };
+  pos: number;
+  filename: string;
+  frame: string;
+
+  toString() {
+    return `${this.message} (${this.start.line}:${this.start.column})\n${this.frame}`;
+  }
+}
+
+export default function error(
+  message: string,
+  props: {
+    name: string;
+    code: string;
+    source: string;
+    filename: string;
+    start: number;
+    end?: number;
+  }
+): never {
+  const error = new CompileError(message);
+  error.name = props.name;
+
+  const start = locate(props.source, props.start, { offsetLine: 1 });
+  const end = locate(props.source, props.end || props.start, { offsetLine: 1 });
+
+  error.code = props.code;
+  error.start = start;
+  error.end = end;
+  error.pos = props.start;
+  error.filename = props.filename;
+
+  error.frame = get_code_frame(props.source, start.line - 1, start.column);
+
+  throw error;
+}