Bring compiler into Astro (#4)

* include source compiler

* Import from JS

* Conditionally use the instance contents

Co-authored-by: Fred K. Schott <fkschott@gmail.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/src/compiler/utils/error.ts b/src/compiler/utils/error.ts
new file mode 100644
index 000000000..5c2cf3732
--- /dev/null
+++ b/src/compiler/utils/error.ts
@@ -0,0 +1,42 @@
+// @ts-nocheck
+
+import { locate } from 'locate-character';
+import get_code_frame from './get_code_frame.js';
+
+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;
+}