Refactor so engines use 0-based document ranges

engines/brainfuck/runtime.ts

@@ -85,7 +85,7 @@ export default class BrainfuckLanguageEngine implements LanguageEngine<BFRS> {
         // Add instruction to AST
         ast.push({
           instr: { type: char as BF_OP, param: jumpTarget },
-          location: { line: lIdx + 1, char: cIdx + 1 },
+          location: { line: lIdx, char: cIdx },
         });
       });
     });

engines/chef/runtime/index.ts

@@ -98,7 +98,7 @@ export default class ChefLanguageEngine implements LanguageEngine<T.ChefRS> {
       } else {
         // Next step is a regular method instruction
         const nextOp = currFrame.recipe.method[currFrame.pc];
-        nextStepLocation = this.convertTo1Index(nextOp.location);
+        nextStepLocation = nextOp.location;
       }
     }
 
@@ -191,19 +191,6 @@ export default class ChefLanguageEngine implements LanguageEngine<T.ChefRS> {
     if (opOutput) return opOutput;
   }
 
-  private convertTo1Index(location: DocumentRange): DocumentRange {
-    const lineNum = location.line + 1;
-    const charRange = location.charRange
-      ? {
-          start: location.charRange.start
-            ? location.charRange.start + 1
-            : undefined,
-          end: location.charRange.end ? location.charRange.end + 1 : undefined,
-        }
-      : undefined;
-    return { line: lineNum, charRange };
-  }
-
   /**
    * Empty the first N dishes of given kitchen into text output.
    * @param numDishes Number of dishes to empty as output

engines/deadfish/runtime.ts

@@ -57,7 +57,7 @@ export default class DeadfishLanguageEngine implements LanguageEngine<DFRS> {
         if (OP_CHARS.includes(char as DF_OP)) {
           ast.push({
             instr: char as DF_OP,
-            location: { line: lIdx + 1, char: cIdx + 1 },
+            location: { line: lIdx, char: cIdx },
           });
         }
       });