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LibJS: Add String.prototype.concat
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3 changed files with 42 additions and 0 deletions
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@ -55,6 +55,7 @@ StringPrototype::StringPrototype()
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put_native_function("trim", trim, 0);
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put_native_function("trimStart", trim_start, 0);
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put_native_function("trimEnd", trim_end, 0);
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put_native_function("concat", concat, 1);
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}
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StringPrototype::~StringPrototype()
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@ -307,4 +308,22 @@ Value StringPrototype::trim_end(Interpreter& interpreter)
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return trim_string(interpreter, *this_object, TrimMode::Right);
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}
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Value StringPrototype::concat(Interpreter& interpreter)
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{
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auto* this_object = interpreter.this_value().to_object(interpreter.heap());
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if (!this_object)
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return {};
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auto& string = this_object->to_string().as_string()->string();
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StringBuilder builder;
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builder.append(string);
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for (size_t i = 0; i < interpreter.argument_count(); ++i) {
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auto string_argument = interpreter.argument(i).to_string();
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builder.append(string_argument);
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}
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return js_string(interpreter, builder.to_string());
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}
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}
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@ -53,6 +53,7 @@ private:
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static Value trim(Interpreter&);
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static Value trim_start(Interpreter&);
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static Value trim_end(Interpreter&);
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static Value concat(Interpreter&);
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};
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}
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