From 7457740c362bfc4911fb2e606e7110c1bf16db95 Mon Sep 17 00:00:00 2001
From: pjh456 <147148383@qq.com>
Date: Wed, 23 Sep 2026 12:44:00 +0000
Subject: [PATCH] =?UTF-8?q?fix:=20Number=20=E5=AD=97=E7=AC=A6=E4=B8=B2?=
 =?UTF-8?q?=E9=A6=96=E5=B0=BE=E7=A9=BA=E7=99=BD=E8=A1=A5=20U+FEFF=20?=
 =?UTF-8?q?=E5=AF=B9=E9=BD=90=20ES=20=E7=A9=BA=E7=99=BD=E9=9B=86?=
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---
 crates/oxide_runtime_api/src/coercion.rs | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/crates/oxide_runtime_api/src/coercion.rs b/crates/oxide_runtime_api/src/coercion.rs
index bd30486a..cc13f32e 100644
--- a/crates/oxide_runtime_api/src/coercion.rs
+++ b/crates/oxide_runtime_api/src/coercion.rs
@@ -125,11 +125,13 @@ pub fn to_number(val: JsValue) -> f64 {
 /// 需先按十进制字符集排除这些令牌（JS 只接受精确的 "Infinity"）。
 ///
 /// # 边界与前提
-/// - trim 后空串 → 0
+/// - 首尾空白（Unicode White_Space 并 BOM U+FEFF，即 StringNumericLiteral
+///   的 WhiteSpace 集）trim 后空串 → 0
 /// - 十六/八/二进制要求全部字符为有效数字，含非法字符 → NaN
 /// - 十进制结果与 Rust parse 一致，溢出时归 ±inf / 0
 fn parse_js_number(s: &str) -> f64 {
-    let t = s.trim();
+    // Rust trim 的 White_Space 不含 U+FEFF，按 ES 空白集显式补齐。
+    let t = s.trim_matches(|c: char| c.is_whitespace() || c == '\u{FEFF}');
     if t.is_empty() {
         return 0.0;
     }
@@ -1049,4 +1051,17 @@ mod tests {
         assert_eq!(parse_js_number("-0"), -0.0);
         assert!(parse_js_number("1abc").is_nan());
     }
+
+    #[test]
+    fn parse_js_number_es_whitespace_set() {
+        // StringNumericLiteral 的 WhiteSpace 集 = Unicode White_Space 并 BOM
+        // U+FEFF：首尾均容忍，数字内部空白仍 NaN。
+        let ws = "\t\u{000B}\u{000C}\u{FEFF}\u{3000}\n\r\u{2028}\u{2029} ";
+        assert_eq!(parse_js_number(&format!("{ws}0{ws}")), 0.0);
+        assert_eq!(parse_js_number(&format!("{ws}1{ws}")), 1.0);
+        assert_eq!(parse_js_number("\u{FEFF}0"), 0.0);
+        assert_eq!(parse_js_number("0\u{FEFF}"), 0.0);
+        assert_eq!(parse_js_number("\u{FEFF}"), 0.0);
+        assert!(parse_js_number("1\u{FEFF}2").is_nan());
+    }
 }