# Why \`@code\_lowered (1,2,3) .+ 1\` returns error?
**URL:** https://discourse.julialang.org/t/why-code-lowered-1-2-3-1-returns-error/15019
**Category:** General Usage
**Created:** [September 16, 2018, 3:20pm UTC](https://discourse.julialang.org/t/why-code-lowered-1-2-3-1-returns-error/15019 "2018-09-16T15:20:02Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@AdamR](https://discourse.julialang.org/u/AdamR)
#### Post date: [September 16, 2018, 3:20pm UTC](https://discourse.julialang.org/t/why-code-lowered-1-2-3-1-returns-error/15019/1 "2018-09-16T15:20:02Z")
```julia
_
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.0.0 (2018-08-08)
_/ |\ __'_|_|_|\__'_| | Official https://julialang.org/ release
|__/ |
julia> (1,2,3) .+ 1
(2, 3, 4)
julia> @code_lowered (1,2,3) .+ 1
ERROR: UndefVarError: .+ not defined
Stacktrace:
[1] top-level scope at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/InteractiveUtils/src/macros.jl:118
```
---
### Author:  [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)
#### Post date: [September 16, 2018, 3:35pm UTC](https://discourse.julialang.org/t/why-code-lowered-1-2-3-1-returns-error/15019/2 "2018-09-16T15:35:19Z")
[https://github.com/JuliaLang/julia/issues/28992](https://github.com/JuliaLang/julia/issues/28992)
---
### Author:  [@AdamR](https://discourse.julialang.org/u/AdamR)
#### Post date: [September 16, 2018, 3:56pm UTC](https://discourse.julialang.org/t/why-code-lowered-1-2-3-1-returns-error/15019/3 "2018-09-16T15:56:14Z")
Is there any walkaround to see the lowered form of this expression. In theory I should get object of type `Broadcasted(+, (1,2,3), 1)`. Or perhaps a function `broadcasted` with the same arguments.
---
### Author:  [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)
#### Post date: [September 16, 2018, 4:19pm UTC](https://discourse.julialang.org/t/why-code-lowered-1-2-3-1-returns-error/15019/4 "2018-09-16T16:19:20Z")
```julia
julia> Meta.lower(Main, :((1,2,3) .+ 1))
:($(Expr(:thunk, CodeInfo(
1 ─ %1 = (Base.getproperty)(Base.Broadcast, :materialize) │
│ %2 = (Base.getproperty)(Base.Broadcast, :broadcasted) │
│ %3 = (Core.tuple)(1, 2, 3) │
│ %4 = (%2)(+, %3, 1) │
│ %5 = (%1)(%4) │
└── return %5 │
))))
julia> f() = (1,2,3) .+ 1
f (generic function with 1 method)
julia> @code_lowered f()
CodeInfo(
1 1 ─ %1 = Base.Broadcast.materialize │
│ %2 = Base.Broadcast.broadcasted │
│ %3 = (Core.tuple)(1, 2, 3) │
│ %4 = (%2)(Main.:+, %3, 1) │
│ %5 = (%1)(%4) │
└── return %5 │
)
```