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use super::invoke::{Identity, Invoke};
use crate::elements;
use alloc::vec::Vec;

pub struct ValueTypeBuilder<F = Identity> {
	callback: F,
}

impl<F> ValueTypeBuilder<F>
where
	F: Invoke<elements::ValueType>,
{
	pub fn with_callback(callback: F) -> Self {
		ValueTypeBuilder { callback }
	}

	pub fn i32(self) -> F::Result {
		self.callback.invoke(elements::ValueType::I32)
	}

	pub fn i64(self) -> F::Result {
		self.callback.invoke(elements::ValueType::I64)
	}

	pub fn f32(self) -> F::Result {
		self.callback.invoke(elements::ValueType::F32)
	}

	pub fn f64(self) -> F::Result {
		self.callback.invoke(elements::ValueType::F64)
	}
}

pub struct ValueTypesBuilder<F = Identity> {
	callback: F,
	value_types: Vec<elements::ValueType>,
}

impl<F> ValueTypesBuilder<F>
where
	F: Invoke<Vec<elements::ValueType>>,
{
	pub fn with_callback(callback: F) -> Self {
		ValueTypesBuilder { callback, value_types: Vec::new() }
	}

	pub fn i32(mut self) -> Self {
		self.value_types.push(elements::ValueType::I32);
		self
	}

	pub fn i64(mut self) -> Self {
		self.value_types.push(elements::ValueType::I64);
		self
	}

	pub fn f32(mut self) -> Self {
		self.value_types.push(elements::ValueType::F32);
		self
	}

	pub fn f64(mut self) -> Self {
		self.value_types.push(elements::ValueType::F64);
		self
	}

	pub fn build(self) -> F::Result {
		self.callback.invoke(self.value_types)
	}
}