Transpile U+2028 and U+2029 (json-superset)

bublejs · Oct 16, 2018 · 08be12b · 08be12b
1 parent 59d1127
commit 08be12b
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diff --git a/src/program/types/Literal.js b/src/program/types/Literal.js
@@ -2,6 +2,8 @@ import Node from '../Node.js';
 import CompileError from '../../utils/CompileError.js';
 import rewritePattern from 'regexpu-core';
 
+const nonAsciiLsOrPs = /[\u2028-\u2029]/g;
+
 export default class Literal extends Node {
 	initialise() {
 		if (typeof this.value === 'string') {
@@ -37,6 +39,15 @@ export default class Literal extends Node {
 					}
 				);
 			}
+		} else if (typeof this.value === "string" && this.value.match(nonAsciiLsOrPs)) {
+			code.overwrite(
+				this.start,
+				this.end,
+				this.raw.replace(nonAsciiLsOrPs, m => m == '\u2028' ? '\\u2028' : '\\u2029'),
+				{
+					contentOnly: true
+				}
+			);
 		}
 	}
 }
diff --git a/test/samples/json-superset.js b/test/samples/json-superset.js
@@ -0,0 +1,12 @@
+module.exports = [
+	{
+		description: 'transpiles U+2028 LINE SEPARATOR',
+		input: `const x = "a\u2028b\u1010"`,
+		output: `var x = "a\\u2028b\u1010"`
+	},
+	{
+		description: 'transpiles U+2029 PARAGRAPH SEPARATOR',
+		input: `const x = "a\u2029b\u1010"`,
+		output: `var x = "a\\u2029b\u1010"`
+	}
+]