Merge pull request #14 from Hajime-san/fix-numeric-literals

fix: preserve Numeric Literals and BigInt Literals

README.md

@@ -71,9 +71,9 @@ Please install [Deno](https://deno.land/[email protected]/getting_started/installat
 ## command
 ### remote
 - dry run
-  - `deno run --allow-env --allow-read --allow-write https://deno.land/x/[email protected].17/bin.ts -b=./src -c=./tsconfig.json -d`
+  - `deno run --allow-env --allow-read --allow-write https://deno.land/x/[email protected].18/bin.ts -b=./src -c=./tsconfig.json -d`
 - transform
-  - `deno run --allow-env --allow-read --allow-write https://deno.land/x/[email protected].17/bin.ts -b=./src -c=./tsconfig.json -r`
+  - `deno run --allow-env --allow-read --allow-write https://deno.land/x/[email protected].18/bin.ts -b=./src -c=./tsconfig.json -r`
 ### local
 - `deno task run-dry`
 - `deno task run`

src/transform.ts

@@ -7,12 +7,35 @@ import {
 import { hasUnicodeStr, unescapeUnicodeStr } from './str.ts';
 
 const transformModuleSpecifier = (
+  sourceFile: ts.SourceFile,
   imports: Array<ResolvedModuleImport>,
 ) => {
   return (context: ts.TransformationContext) => (rootNode: ts.Node) => {
     const visit = (node: ts.Node): ts.Node => {
       const newNode = ts.visitEachChild(node, visit, context);
 
+      // Preserve Numeric Literals
+      //
+      // const numericSeparators = 100_000;
+      // const octal = 0001;
+      // const hex = 0x00111;
+      // const binary = 0b0011;
+      // https://github.com/microsoft/TypeScript/issues/53182
+      if (ts.isNumericLiteral(newNode)) {
+        return context.factory.createNumericLiteral(
+          newNode.getText(sourceFile),
+        );
+      }
+
+      // Preserve BigInt Literals
+      //
+      // const previouslyMaxSafeInteger = 9007199254740991n;
+      if (ts.isBigIntLiteral(newNode)) {
+        return context.factory.createBigIntLiteral(
+          newNode.getText(sourceFile),
+        );
+      }
+
       // Transform "import call"
       //
       // const foo = import('./foo');
@@ -91,7 +114,7 @@ export const transform = (args: {
 }): string => {
   const { sourceFile, imports, tsConfigObject, printer } = args;
   const transformationResult = ts.transform(sourceFile, [
-    transformModuleSpecifier(imports),
+    transformModuleSpecifier(sourceFile, imports),
   ], tsConfigObject.options);
 
   const printed = printer.printNode(

src/transform_test.ts

@@ -11,7 +11,9 @@ Deno.test('transform', async (t) => {
         sourceFile: ts.createSourceFile(
           './src/App.tsx',
           `import { ComponentA } from './ComponentA';\n` +
-            `const str = '😎';\n`,
+            `const str = '😎';\n` +
+            `const bigIntLiterals = 0o777777777777n;\n` +
+            `const numericSeparators = 100_000;\n`,
           ts.ScriptTarget.ESNext,
         ),
         imports: [
@@ -21,7 +23,9 @@ Deno.test('transform', async (t) => {
         printer: ts.createPrinter(),
       }),
       `import { ComponentA } from "./ComponentA.tsx";\n` +
-        `const str = "😎";\n`,
+        `const str = "😎";\n` +
+        `const bigIntLiterals = 0o777777777777n;\n` +
+        `const numericSeparators = 100_000;\n`,
     );
   });
 });