package core

import (
	"git.akyoto.dev/cli/q/src/asm"
	"git.akyoto.dev/cli/q/src/cpu"
	"git.akyoto.dev/cli/q/src/expression"
	"git.akyoto.dev/cli/q/src/types"
)

// CallToRegister moves the result of a function call into the given register.
func (f *Function) CallToRegister(node *expression.Expression, register cpu.Register) (types.Type, error) {
	types, err := f.CompileCall(node)

	if err != nil {
		return nil, err
	}

	if register != f.CPU.Output[0] {
		f.RegisterRegister(asm.MOVE, register, f.CPU.Output[0])
	}

	if len(types) == 0 {
		return nil, nil
	}

	return types[0], err
}