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@ ProgramNode (location: (1,0)-(3,24))
├── locals: []
└── statements:
@ StatementsNode (location: (1,0)-(3,24))
└── body: (length: 2)
├── @ DefNode (location: (1,0)-(1,18))
│ ├── name: :f
│ ├── name_loc: (1,4)-(1,5) = "f"
│ ├── receiver: ∅
│ ├── parameters:
│ │ @ ParametersNode (location: (1,6)-(1,13))
│ │ ├── requireds: (length: 0)
│ │ ├── optionals: (length: 1)
│ │ │ └── @ OptionalParameterNode (location: (1,6)-(1,13))
│ │ │ ├── flags: ∅
│ │ │ ├── name: :foo
│ │ │ ├── name_loc: (1,6)-(1,9) = "foo"
│ │ │ ├── operator_loc: (1,10)-(1,11) = "="
│ │ │ └── value:
│ │ │ @ IntegerNode (location: (1,12)-(1,13))
│ │ │ ├── flags: decimal
│ │ │ └── value: 1
│ │ ├── rest: ∅
│ │ ├── posts: (length: 0)
│ │ ├── keywords: (length: 0)
│ │ ├── keyword_rest: ∅
│ │ └── block: ∅
│ ├── body: ∅
│ ├── locals: [:foo]
│ ├── def_keyword_loc: (1,0)-(1,3) = "def"
│ ├── operator_loc: ∅
│ ├── lparen_loc: ∅
│ ├── rparen_loc: ∅
│ ├── equal_loc: ∅
│ └── end_keyword_loc: (1,15)-(1,18) = "end"
└── @ DefNode (location: (3,0)-(3,24))
├── name: :f
├── name_loc: (3,4)-(3,5) = "f"
├── receiver: ∅
├── parameters:
│ @ ParametersNode (location: (3,6)-(3,18))
│ ├── requireds: (length: 0)
│ ├── optionals: (length: 2)
│ │ ├── @ OptionalParameterNode (location: (3,6)-(3,11))
│ │ │ ├── flags: ∅
│ │ │ ├── name: :foo
│ │ │ ├── name_loc: (3,6)-(3,9) = "foo"
│ │ │ ├── operator_loc: (3,9)-(3,10) = "="
│ │ │ └── value:
│ │ │ @ IntegerNode (location: (3,10)-(3,11))
│ │ │ ├── flags: decimal
│ │ │ └── value: 1
│ │ └── @ OptionalParameterNode (location: (3,13)-(3,18))
│ │ ├── flags: ∅
│ │ ├── name: :bar
│ │ ├── name_loc: (3,13)-(3,16) = "bar"
│ │ ├── operator_loc: (3,16)-(3,17) = "="
│ │ └── value:
│ │ @ IntegerNode (location: (3,17)-(3,18))
│ │ ├── flags: decimal
│ │ └── value: 2
│ ├── rest: ∅
│ ├── posts: (length: 0)
│ ├── keywords: (length: 0)
│ ├── keyword_rest: ∅
│ └── block: ∅
├── body: ∅
├── locals: [:foo, :bar]
├── def_keyword_loc: (3,0)-(3,3) = "def"
├── operator_loc: ∅
├── lparen_loc: (3,5)-(3,6) = "("
├── rparen_loc: (3,18)-(3,19) = ")"
├── equal_loc: ∅
└── end_keyword_loc: (3,21)-(3,24) = "end"
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