eof helpers

src/index.ts

@@ -65,6 +65,15 @@ export class SourceText {
     return this.lineStarts.length;
   }
 
+  get eofLocation(): SourceLocation {
+    return this.getLocation(this.length);
+  }
+
+  get eofSpan(): Span {
+    const loc = this.eofLocation;
+    return span(loc, loc);
+  }
+
   sliceByCp(start: number, end: number): string {
     const startRef = this.chars[start];
     // Handle out of bounds gracefully
@@ -195,6 +204,15 @@ export class SourceRegion {
     return this.span.end.line - this.span.start.line + 1;
   }
 
+  get eofLocation(): SourceLocation {
+    return this.span.end;
+  }
+
+  get eofSpan(): Span {
+    const loc = this.eofLocation;
+    return span(loc, loc);
+  }
+
   toString(): string {
     return this.source.sliceByCp(this.span.start.index, this.span.end.index);
   }