--- parse tree ---
[ Code
    "test/typ/compiler/show-selector-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/compiler/show-selector-01.typ"
                                 ( line 1 , column 47 )
                                 (FuncCall
                                    (Ident (Identifier "repr"))
                                    [ NormalArg (Ident (Identifier "x")) ])
                             , Space
                             , Text "/"
                             , Text "="
                             , Space
                             , Code
                                 "test/typ/compiler/show-selector-01.typ"
                                 ( line 1 , column 59 )
                                 (FuncCall
                                    (Ident (Identifier "repr"))
                                    [ NormalArg (Ident (Identifier "y")) ])
                             , Text ")"
                             ])
                      )
                    ]
                ]))))
, SoftBreak
, Code
    "test/typ/compiler/show-selector-01.typ"
    ( line 2 , column 2 )
    (Show
       (Just
          (FuncCall
             (FieldAccess
                (Ident (Identifier "where")) (Ident (Identifier "heading")))
             [ KeyValArg (Identifier "level") (Literal (Int 1)) ]))
       (Set
          (Ident (Identifier "text"))
          [ NormalArg (Ident (Identifier "red")) ]))
, SoftBreak
, Code
    "test/typ/compiler/show-selector-01.typ"
    ( line 3 , column 2 )
    (Show
       (Just
          (FuncCall
             (FieldAccess
                (Ident (Identifier "where")) (Ident (Identifier "heading")))
             [ KeyValArg (Identifier "level") (Literal (Int 2)) ]))
       (Set
          (Ident (Identifier "text"))
          [ NormalArg (Ident (Identifier "blue")) ]))
, SoftBreak
, Code
    "test/typ/compiler/show-selector-01.typ"
    ( line 4 , column 2 )
    (Show
       (Just (Ident (Identifier "heading")))
       (Set
          (Ident (Identifier "text"))
          [ NormalArg (Ident (Identifier "green")) ]))
, SoftBreak
, Heading 1 [ Text "Red" ]
, Heading 2 [ Text "Blue" ]
, Heading 3 [ Text "Green" ]
]
--- evaluated ---
document(body: { text(body: [
]), 
                 text(body: [
]), 
                 text(body: [
]), 
                 text(body: [
]), 
                 heading(body: text(body: [Red]), 
                         level: 1), 
                 heading(body: text(body: [Blue]), 
                         level: 2), 
                 heading(body: text(body: [Green]), 
                         level: 3) })