port platform module

compiler/reporting/src/error/parse.rs

@@ -2552,6 +2552,27 @@ fn to_header_report<'a>(
             }
         }
 
+        EHeader::PlatformName(row, col) => {
+            let surroundings = Region::from_rows_cols(start_row, start_col, *row, *col);
+            let region = Region::from_row_col(*row, *col);
+
+            let doc = alloc.stack(vec![
+                alloc.reflow(r"I am partway through parsing a header, but got stuck here:"),
+                alloc.region_with_subregion(surroundings, region),
+                alloc.concat(vec![
+                    alloc.reflow("I am expecting a platform name next, like "),
+                    alloc.parser_suggestion("roc/core"),
+                    alloc.reflow("."),
+                ]),
+            ]);
+
+            Report {
+                filename,
+                doc,
+                title: "WEIRD MODULE NAME".to_string(),
+            }
+        }
+
         EHeader::Space(error, row, col) => to_space_report(alloc, filename, &error, *row, *col),
     }
 }