ruby · ledsun · Jul 23, 2023
diff --git a/ext/js/bindgen/rb-js-abi-host.c b/ext/js/bindgen/rb-js-abi-host.c
@@ -151,6 +151,12 @@ rb_js_abi_host_js_abi_value_t rb_js_abi_host_rb_object_to_js_rb_value(uint32_t r
   int32_t ret = __wasm_import_rb_js_abi_host_rb_object_to_js_rb_value((int32_t) (raw_rb_abi_value));
   return (rb_js_abi_host_js_abi_value_t){ ret };
 }
+__attribute__((import_module("rb-js-abi-host"), import_name("js-value-to-bool: func(value: handle<js-abi-value>) -> bool")))
+int32_t __wasm_import_rb_js_abi_host_js_value_to_bool(int32_t);
+bool rb_js_abi_host_js_value_to_bool(rb_js_abi_host_js_abi_value_t value) {
+  int32_t ret = __wasm_import_rb_js_abi_host_js_value_to_bool((value).idx);
+  return ret;
+}
 __attribute__((import_module("rb-js-abi-host"), import_name("js-value-to-string: func(value: handle<js-abi-value>) -> string")))
 void __wasm_import_rb_js_abi_host_js_value_to_string(int32_t, int32_t);
 void rb_js_abi_host_js_value_to_string(rb_js_abi_host_js_abi_value_t value, rb_js_abi_host_string_t *ret0) {

diff --git a/ext/js/bindgen/rb-js-abi-host.h b/ext/js/bindgen/rb-js-abi-host.h
@@ -57,6 +57,7 @@ extern "C"
   rb_js_abi_host_js_abi_value_t rb_js_abi_host_bool_to_js_bool(bool value);
   rb_js_abi_host_js_abi_value_t rb_js_abi_host_proc_to_js_function(uint32_t value);
   rb_js_abi_host_js_abi_value_t rb_js_abi_host_rb_object_to_js_rb_value(uint32_t raw_rb_abi_value);
+  bool rb_js_abi_host_js_value_to_bool(rb_js_abi_host_js_abi_value_t value);
   void rb_js_abi_host_js_value_to_string(rb_js_abi_host_js_abi_value_t value, rb_js_abi_host_string_t *ret0);
   void rb_js_abi_host_js_value_to_integer(rb_js_abi_host_js_abi_value_t value, rb_js_abi_host_raw_integer_t *ret0);
   void rb_js_abi_host_export_js_value_to_host(rb_js_abi_host_js_abi_value_t value);

diff --git a/ext/js/bindgen/rb-js-abi-host.wit b/ext/js/bindgen/rb-js-abi-host.wit
@@ -16,6 +16,8 @@ bool-to-js-bool: func(value: bool) -> js-abi-value
 proc-to-js-function: func(value: u32) -> js-abi-value
 rb-object-to-js-rb-value: func(raw-rb-abi-value: u32) -> js-abi-value
 
+js-value-to-bool: func(value: js-abi-value) -> bool
+
 js-value-to-string: func(value: js-abi-value) -> string
 
 variant raw-integer {

diff --git a/ext/js/js-core.c b/ext/js/js-core.c
@@ -324,6 +324,17 @@ static VALUE _rb_js_obj_typeof(VALUE obj) {
   return rb_str_new(ret0.ptr, ret0.len);
 }
 
+/*
+ * call-seq:
+ *   to_b -> boolean
+ *
+ */
+static VALUE _rb_js_obj_to_b(VALUE obj) {
+  struct jsvalue *p = check_jsvalue(obj);
+  bool ret0 = rb_js_abi_host_js_value_to_bool(p->abi);
+  return RBOOL(ret0);
+}
+
 /*
  * call-seq:
  *   to_s -> string
@@ -560,6 +571,7 @@ void Init_js() {
                            0);
   rb_define_private_method(rb_cJS_singleton, "__import_from_js",
                            _rb_js_import_from_js, 0);
+  rb_define_method(rb_cJS_Object, "to_b", _rb_js_obj_to_b, 0);
   rb_define_method(rb_cJS_Object, "to_s", _rb_js_obj_to_s, 0);
   rb_define_alias(rb_cJS_Object, "inspect", "to_s");
   rb_define_method(rb_cJS_Object, "to_i", _rb_js_obj_to_i, 0);

diff --git a/packages/npm-packages/ruby-wasm-wasi/src/bindgen/rb-js-abi-host.d.ts b/packages/npm-packages/ruby-wasm-wasi/src/bindgen/rb-js-abi-host.d.ts
@@ -28,6 +28,7 @@ export interface RbJsAbiHost {
   boolToJsBool(value: boolean): JsAbiValue;
   procToJsFunction(value: number): JsAbiValue;
   rbObjectToJsRbValue(rawRbAbiValue: number): JsAbiValue;
+  jsValueToBool(value: JsAbiValue): boolean;
   jsValueToString(value: JsAbiValue): string;
   jsValueToInteger(value: JsAbiValue): RawInteger;
   exportJsValueToHost(value: JsAbiValue): void;

diff --git a/packages/npm-packages/ruby-wasm-wasi/src/bindgen/rb-js-abi-host.js b/packages/npm-packages/ruby-wasm-wasi/src/bindgen/rb-js-abi-host.js
@@ -66,6 +66,10 @@ export function addRbJsAbiHostToImports(imports, obj, get_export) {
     const ret0 = obj.rbObjectToJsRbValue(arg0 >>> 0);
     return resources0.insert(ret0);
   };
+  imports["rb-js-abi-host"]["js-value-to-bool: func(value: handle<js-abi-value>) -> bool"] = function(arg0) {
+    const ret0 = obj.jsValueToBool(resources0.get(arg0));
+    return ret0 ? 1 : 0;
+  };
   imports["rb-js-abi-host"]["js-value-to-string: func(value: handle<js-abi-value>) -> string"] = function(arg0, arg1) {
     const memory = get_export("memory");
     const realloc = get_export("cabi_realloc");

diff --git a/packages/npm-packages/ruby-wasm-wasi/src/index.ts b/packages/npm-packages/ruby-wasm-wasi/src/index.ts
@@ -213,6 +213,9 @@ export class RubyVM {
         rbObjectToJsRbValue: (rawRbAbiValue) => {
           return this.rbValueOfPointer(rawRbAbiValue);
         },
+        jsValueToBool: (value) => {
+          return Boolean(value);
+        },
         jsValueToString: (value) => {
           // According to the [spec](https://tc39.es/ecma262/multipage/text-processing.html#sec-string-constructor-string-value)
           // `String(value)` always returns a string.

diff --git a/packages/npm-packages/ruby-wasm-wasi/test/unit/test_object.rb b/packages/npm-packages/ruby-wasm-wasi/test/unit/test_object.rb
@@ -56,6 +56,16 @@ def test_strictly_eql?
                                 JS.eval("return undefined;")
   end
 
+  def test_to_b
+    assert_true JS.eval("return true;").to_b
+    assert_false JS.eval("return false;").to_b
+    assert_false JS.eval("return 0;").to_b
+    assert_false JS.eval("return -0;").to_b
+    assert_false JS.eval("return NaN;").to_b
+    assert_false JS.eval("return null;").to_b
+    assert_false JS.eval("return undefined;").to_b
+  end
+
   def test_to_s
     assert_equal "str", JS.eval("return 'str';").to_s
     assert_equal "24", JS.eval("return 24;").to_s