Splitting BlockComments into lines only once per run.

Author: Janther

src/slang-nodes/MultiLineComment.ts

@@ -14,16 +14,19 @@ export class MultiLineComment extends CommentNode {
 
   value: string;
 
+  lines: string[];
+
   constructor(ast: TerminalNode, offset: number) {
     super(ast, offset);
 
     this.value = ast.unparse();
+    this.lines = this.value.slice(1).split('\n');
   }
 
   print(): Doc {
     if (isIndentableBlockComment(this)) {
       return printIndentableBlockComment(this);
     }
-    return join(literalline, this.value.split('\n'));
+    return ['/', join(literalline, this.lines)];
   }
 }

src/slang-nodes/MultiLineNatSpecComment.ts

@@ -14,16 +14,19 @@ export class MultiLineNatSpecComment extends CommentNode {
 
   value: string;
 
+  lines: string[];
+
   constructor(ast: TerminalNode, offset: number) {
     super(ast, offset);
 
     this.value = ast.unparse();
+    this.lines = this.value.slice(1).split('\n');
   }
 
   print(): Doc {
     if (isIndentableBlockComment(this)) {
       return printIndentableBlockComment(this);
     }
-    return join(literalline, this.value.split('\n'));
+    return ['/', join(literalline, this.lines)];
   }
 }

src/slang-printers/print-indentable-block-comment.ts

@@ -5,14 +5,12 @@ import type { BlockComment } from '../slang-nodes/types.d.ts';
 
 const { hardline, join } = doc.builders;
 
-export function printIndentableBlockComment(comment: BlockComment): Doc {
-  const lines = comment.value.split('\n');
-
+export function printIndentableBlockComment({ lines }: BlockComment): Doc {
   return join(
     hardline,
     lines.map((line, index) =>
       index === 0
-        ? line.trimEnd()
+        ? `/${line.trimEnd()}`
         : ` ${index < lines.length - 1 ? line.trim() : line.trimStart()}`
     )
   );

src/slang-utils/is-indentable-block-comment.ts

@@ -1,10 +1,9 @@
 import type { BlockComment } from '../slang-nodes/types.d.ts';
 
-export function isIndentableBlockComment(comment: BlockComment): boolean {
+export function isIndentableBlockComment({ lines }: BlockComment): boolean {
   // If the comment has multiple lines and every line starts with a star
   // we can fix the indentation of each line. The stars in the `/*` and
   // `*/` delimiters are not included in the comment value, so add them
   // back first.
-  const lines = comment.value.slice(1, -1).split('\n');
   return lines.length > 1 && lines.every((line) => line.trimStart()[0] === '*');
 }