# patch QEDprocesses
# see issue https://github.com/QEDjl-project/QEDprocesses.jl/issues/77
@inline function QEDprocesses.number_particles(
    proc_def::QEDbase.AbstractProcessDefinition,
    ::Type{PS},
) where {
    DIR <: QEDbase.ParticleDirection,
    PT <: QEDbase.AbstractParticleType,
    EL <: AbstractFourMomentum,
    PS <: ParticleStateful{DIR, PT, EL},
}
    return QEDprocesses.number_particles(proc_def, DIR(), PT())
end

@inline function QEDcore.ParticleStateful{DIR, SPECIES}(
    mom::AbstractFourMomentum,
) where {DIR <: ParticleDirection, SPECIES <: AbstractParticleType}
    return ParticleStateful(DIR(), SPECIES(), mom)
end

@inline function QEDcore.ParticleStateful{DIR, SPECIES, EL}(
    mom::EL,
) where {DIR <: ParticleDirection, SPECIES <: AbstractParticleType, EL <: AbstractFourMomentum}
    return ParticleStateful(DIR(), SPECIES(), mom)
end