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Added size() function.

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yhirose 2015-07-08 13:16:00 -04:00
parent 8039e65143
commit d800dd26f7
1 changed files with 19 additions and 0 deletions
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19
language/interpreter.hpp
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@ -55,6 +55,14 @@ struct Value
explicit Value(ArrayValue&& a) : type(Array), v(a) {}
explicit Value(FunctionValue&& f) : type(Function), v(f) {}
long size() const {
switch (type) {
case String: return to_string().size();
case Array: return to_array().values.size();
}
throw std::runtime_error("type error.");
}
bool to_bool() const {
switch (type) {
case Bool: return v.get<bool>();
@ -286,6 +294,17 @@ struct Environment
}
}),
false);
initialize(
"size",
Value(Value::FunctionValue {
{ {"arg", true} },
[](std::shared_ptr<Environment> env) {
auto size = env->get("arg").size();
return Value(size);
}
}),
false);
}
private: