Hello,

I’m trying to parse basic algebraic expressions. I’m using elm-tools/parser version 2.0.1.

Right now I’m stuck at “addition”: the problem is that the addition parser fails but the node parser doesn’t fallback on the number parser.

Here’s my code:

```
type Node
= Number Float
| Add Node Node
spaces : Parser ()
spaces =
ignore zeroOrMore (\c -> c == ' ')
number : Parser Node
number =
inContext "number" <|
oneOf
[ succeed (\i -> Number (-i))
|. symbol "-"
|= float
, succeed Number
|= float
]
node : Parser Node
node =
inContext "expression" <|
oneOf [ add, number ]
add : Parser Node
add =
inContext "addition" <|
succeed Add
|= number
|. spaces
|. symbol "+"
|. spaces
|= number
```

I get an error when trying to parse string “1”.

Here is a running version on Ellie:

https://ellie-app.com/bv4X2yBqSa1/2