--- parse tree ---
[ Code
    "test/typ/meta/heading-01.typ"
    ( line 1 , column 2 )
    (Let
       (BasicBind (Just (Identifier "test")))
       (FuncExpr
          [ NormalParam (Identifier "x") , NormalParam (Identifier "y") ]
          (Block
             (CodeBlock
                [ If
                    [ ( Equals (Ident (Identifier "x")) (Ident (Identifier "y"))
                      , Block (Content [ Text "\9989" ])
                      )
                    , ( Literal (Boolean True)
                      , Block
                          (Content
                             [ Text "\10060"
                             , Text "("
                             , Code
                                 "test/typ/meta/heading-01.typ"
                                 ( line 1 , column 47 )
                                 (FuncCall
                                    (Ident (Identifier "repr"))
                                    [ NormalArg (Ident (Identifier "x")) ])
                             , Space
                             , Text "/"
                             , Text "="
                             , Space
                             , Code
                                 "test/typ/meta/heading-01.typ"
                                 ( line 1 , column 59 )
                                 (FuncCall
                                    (Ident (Identifier "repr"))
                                    [ NormalArg (Ident (Identifier "y")) ])
                             , Text ")"
                             ])
                      )
                    ]
                ]))))
, SoftBreak
, Comment
, SoftBreak
, Comment
, Comment
, Space
, Text "="
, Space
, Text "Level"
, Space
, Text "1"
, SoftBreak
, Code
    "test/typ/meta/heading-01.typ"
    ( line 6 , column 2 )
    (Block (Content [ Heading 2 [ Text "Level" , Space , Text "2" ] ]))
, SoftBreak
, Code
    "test/typ/meta/heading-01.typ"
    ( line 7 , column 2 )
    (FuncCall
       (Ident (Identifier "box"))
       [ BlockArg [ Heading 3 [ Text "Level" , Space , Text "3" ] ] ])
, ParBreak
, Comment
, Text "No"
, Space
, Text "="
, Space
, Text "heading"
, ParBreak
, Comment
, Text "="
, Space
, Text "No"
, Space
, Text "heading"
, ParBreak
]
--- evaluated ---
document(body: { text(body: [
]), 
                 text(body: [
]), 
                 text(body: [ = Level 1
]), 
                 heading(body: text(body: [Level 2]), 
                         level: 2), 
                 text(body: [
]), 
                 box(body: heading(body: text(body: [Level 3]), 
                                   level: 3)), 
                 parbreak(), 
                 text(body: [No = heading]), 
                 parbreak(), 
                 text(body: [= No heading]), 
                 parbreak() })