jscript: Support passing non-string pattern to RegExp constructor.

dlls/jscript/jsregexp.c

@@ -674,7 +674,7 @@ HRESULT create_regexp_var(script_ctx_t *ctx, jsval_t src_arg, jsval_t *flags_arg
     unsigned flags, opt_len = 0;
     const WCHAR *opt = NULL;
     jsstr_t *src;
-    HRESULT hres;
+    HRESULT hres = S_OK;
 
     if(is_object_instance(src_arg)) {
         jsdisp_t *obj;
@@ -693,12 +693,12 @@ HRESULT create_regexp_var(script_ctx_t *ctx, jsval_t src_arg, jsval_t *flags_arg
         }
     }
 
-    if(!is_string(src_arg)) {
-        FIXME("src_arg = %s\n", debugstr_jsval(src_arg));
-        return E_NOTIMPL;
-    }
-
-    src = get_string(src_arg);
+    if(is_undefined(src_arg))
+        src = jsstr_empty();
+    else
+        hres = to_string(ctx, src_arg, &src);
+    if(FAILED(hres))
+        return hres;
 
     if(flags_arg) {
         jsstr_t *opt_str;
@@ -710,16 +710,18 @@ HRESULT create_regexp_var(script_ctx_t *ctx, jsval_t src_arg, jsval_t *flags_arg
 
         opt_str = get_string(*flags_arg);
         opt = jsstr_flatten(opt_str);
-        if(!opt)
+        if(!opt) {
+            jsstr_release(src);
             return E_OUTOFMEMORY;
+        }
         opt_len = jsstr_length(opt_str);
     }
 
     hres = parse_regexp_flags(opt, opt_len, &flags);
-    if(FAILED(hres))
+    if(SUCCEEDED(hres))
+        hres = create_regexp(ctx, src, flags, ret);
+    jsstr_release(src);
     return hres;
-
-    return create_regexp(ctx, src, flags, ret);
 }
 
 HRESULT regexp_string_match(script_ctx_t *ctx, jsdisp_t *re, jsstr_t *jsstr, jsval_t *r)
@@ -953,12 +955,7 @@ static HRESULT RegExpConstr_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags
         jsdisp_t *ret;
         HRESULT hres;
 
-        if(!argc) {
-            FIXME("no args\n");
-            return E_NOTIMPL;
-        }
-
-        hres = create_regexp_var(ctx, argv[0], argc > 1 ? argv+1 : NULL, &ret);
+        hres = create_regexp_var(ctx, argc ? argv[0] : jsval_undefined(), argc > 1 ? argv+1 : NULL, &ret);
         if(FAILED(hres))
             return hres;
 

dlls/jscript/tests/regexp.js

@@ -677,4 +677,28 @@ ok(re.ignoreCase === false, "re.ignoreCase = " + re.ignoreCase);
 ok(re.multiline === true, "re.multiline = " + re.multiline);
 ok(re.global === true, "re.global = " + re.global);
 
+re = new RegExp(undefined);
+ok(re.source === "", "re.source = " + re.source);
+ok(re.ignoreCase === false, "re.ignoreCase = " + re.ignoreCase);
+ok(re.multiline === false, "re.multiline = " + re.multiline);
+ok(re.global === false, "re.global = " + re.global);
+
+re = new RegExp();
+ok(re.source === "", "re.source = " + re.source);
+ok(re.ignoreCase === false, "re.ignoreCase = " + re.ignoreCase);
+ok(re.multiline === false, "re.multiline = " + re.multiline);
+ok(re.global === false, "re.global = " + re.global);
+
+re = new RegExp(true);
+ok(re.source === "true", "re.source = " + re.source);
+ok(re.ignoreCase === false, "re.ignoreCase = " + re.ignoreCase);
+ok(re.multiline === false, "re.multiline = " + re.multiline);
+ok(re.global === false, "re.global = " + re.global);
+
+re = new RegExp({ toString: function() { return "test"; } });
+ok(re.source === "test", "re.source = " + re.source);
+ok(re.ignoreCase === false, "re.ignoreCase = " + re.ignoreCase);
+ok(re.multiline === false, "re.multiline = " + re.multiline);
+ok(re.global === false, "re.global = " + re.global);
+
 reportSuccess();