===== CASE: FOO=1 break =====


  FOO=1 break
  ^~~~
[ -c flag ]:1: Control flow shouldn't have environment bindings

===== CASE: break 1 2 =====


  break 1 2
          ^
[ -c flag ]:1: Unexpected argument to 'break'

===== CASE: x"y"() { echo hi; } =====


  x"y"() { echo hi; }
  ^
[ -c flag ]:1: Invalid function name

===== CASE: function x"y" { echo hi; } =====


  function x"y" { echo hi; }
           ^
[ -c flag ]:1: Invalid KSH-style function name

===== CASE: } =====


  }
  ^
[ -c flag ]:1: Unexpected right brace

===== CASE: case foo in *) echo  =====


  case foo in *) echo
                      ^
[ -c flag ]:1: Expected ;; or esac

===== CASE: ls foo| =====


  ls foo|
         ^
[ -c flag ]:1: Unexpected EOF while parsing command

===== CASE: ls foo&& =====


  ls foo&&
          ^
[ -c flag ]:1: Unexpected EOF while parsing command

===== CASE: foo() =====


  foo()
       ^
[ -c flag ]:1: Unexpected word while parsing compound command

===== CASE: break >out =====


(command.ControlFlow keyword:<Id.ControlFlow_Break break>)

===== CASE: break >out =====


  break >out
  ^~~~~
[ -c flag ]:1: Control flow shouldn't have redirects

===== CASE: [ ( x ] =====


  [ ( x ]
        ^
[ -c flag ]:1: Syntax error in expression (near Id.Op_RBracket)

===== CASE: PYTHONPATH=. FOO=(1 2) python =====


  PYTHONPATH=. FOO=(1 2) python
               ^~~~
[ -c flag ]:1: Environment bindings can't contain array literals

===== CASE: PYTHONPATH+=1 python =====


  PYTHONPATH+=1 python
  ^~~~~~~~~~~~
[ -c flag ]:1: Expected = in environment binding, got +=

===== CASE:  
    echo line 2
    echo $( echo  =====


      echo $( echo
                   ^
[ -c flag ]:3: Invalid word while parsing command list

===== CASE:  
    echo line 2
    echo ` echo  =====


      echo ` echo
           ^
[ -c flag ]:3: Unexpected EOF while looking for closing backtick

===== CASE: 
    echo line 2
    echo ` echo \`  =====


      echo ` echo \`
           ^
[ -c flag ]:3: Unexpected EOF while looking for closing backtick

===== CASE: 
    echo line 2
    echo ` echo \`unclosed `  =====


      echo ` echo \`unclosed `
                  ^
[ backticks in [ -c flag ] ]:3: Unexpected EOF while looking for closing backtick

===== CASE: echo `for x in` =====


  echo `for x in`
                ^
[ backticks in [ -c flag ] ]:1: Invalid word in for loop

===== CASE: echo < << =====


  echo < <<
         ^~
[ -c flag ]:1: Invalid token after redirect operator

===== CASE: echo $( echo > >>  ) =====


  echo $( echo > >>  )
                 ^~
[ -c flag ]:1: Invalid token after redirect operator

===== CASE: cat <<EOF
$(( 1 * ))  
EOF
 =====


  $(( 1 * ))
          ^
[ -c flag ]:2: Token can't be used in prefix position

===== CASE: cat <<EOF
invalid: ${a!}
EOF
 =====


  invalid: ${a!}
              ^
[ -c flag ]:2: Expected } to close ${

===== CASE: cat <<EOF
$(for x in )
EOF
 =====


  $(for x in )
             ^
[ -c flag ]:2: Invalid word in for loop

===== CASE: cat << $(invalid here end) =====


  cat << $(invalid here end)
         ^~
[ -c flag ]:1: Unterminated here doc began here

===== CASE: cat << $((1+2)) =====


  cat << $((1+2))
         ^~~
[ -c flag ]:1: Unterminated here doc began here

===== CASE: cat << a=(1 2 3) =====


  cat << a=(1 2 3)
         ^~
[ -c flag ]:1: Unterminated here doc began here

===== CASE: cat << \a$(invalid) =====


  cat << \a$(invalid)
         ^~
[ -c flag ]:1: Unterminated here doc began here

===== CASE: cat << "double"$(invalid) =====


  cat << "double"$(invalid)
         ^
[ -c flag ]:1: Unterminated here doc began here

===== CASE: cat << ~foo/$(invalid) =====


  cat << ~foo/$(invalid)
         ^~~~
[ -c flag ]:1: Unterminated here doc began here

===== CASE: cat << $var/$(invalid) =====


  cat << $var/$(invalid)
         ^~~~
[ -c flag ]:1: Unterminated here doc began here

===== CASE: a[-1]+=(4 5) =====


  a[-1]+=(4 5)
         ^
[ -c flag ]:1: Unexpected left paren (might need a space before it)

===== CASE: echo ${ =====


  echo ${
         ^
[ -c flag ]:1: Unexpected token in ${}

===== CASE: ${foo:} =====


  ${foo:}
        ^
[ -c flag ]:1: Token can't be used in prefix position

===== CASE: echo ${a[@Z =====


  echo ${a[@Z
            ^
[ -c flag ]:1: Expected ] to close subscript

===== CASE: echo ${x.} =====


  echo ${x.}
          ^
[ -c flag ]:1: Expected } to close ${

===== CASE: echo ${!x.} =====


  echo ${!x.}
           ^
[ -c flag ]:1: Expected } to close ${

===== CASE: echo ${a:1;} =====


  echo ${a:1;}
            ^
[ -c flag ]:1: Expected : or } in slice

===== CASE: echo ${a:1:2;} =====


  echo ${a:1:2;}
              ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Arith_Semi != Id.Arith_RBrace)

===== CASE: echo ${#a. =====


  echo ${#a.
           ^
[ -c flag ]:1: Expected } after length expression

===== CASE: for (( i = 0; i < 10; i++ ; =====


  for (( i = 0; i < 10; i++ ;
                            ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Arith_Semi != Id.Arith_RParen)

===== CASE: for (( i = 0; i < 10; i++ / =====


  for (( i = 0; i < 10; i++ /
                             ^
[ -c flag ]:1: Unexpected end of input

===== CASE: echo @(extglob|foo =====


  echo @(extglob|foo
       ^~
[ -c flag ]:1: Unexpected EOF reading extended glob that began here

===== CASE: ${undef:- =====


  ${undef:-
           ^
[ -c flag ]:1: Expected } to close ${

===== CASE: ${undef:-$ =====


  ${undef:-$
            ^
[ -c flag ]:1: Expected } to close ${

===== CASE: ${undef:-$F =====


  ${undef:-$F
             ^
[ -c flag ]:1: Expected } to close ${

===== CASE: ${x@ =====


  ${x@
     ^
[ -c flag ]:1: Unexpected token in ${} (VOp3)

===== CASE: ${x@Q =====


  ${x@Q
       ^
[ -c flag ]:1: Expected } to close ${

===== CASE: ${x% =====


  ${x%
      ^
[ -c flag ]:1: Expected } to close ${

===== CASE: ${x/ =====


  ${x/
      ^
[ -c flag ]:1: Pattern in ${x/pat/replace} must not be empty

===== CASE: ${x/a/ =====


  ${x/a/
        ^
[ -c flag ]:1: Expected } after replacement string, got Id.Eof_Real

===== CASE: ${x/a/b =====


  ${x/a/b
         ^
[ -c flag ]:1: Expected } after replacement string, got Id.Eof_Real

===== CASE: ${x: =====


  ${x:
      ^
[ -c flag ]:1: Unexpected end of input

===== CASE: a=(1 & 2) =====


  a=(1 & 2)
       ^
[ -c flag ]:1: Unexpected token in array literal

===== CASE: a= (1 2) =====


  a= (1 2)
    ^
[ -c flag ]:1: Expected ( after =

===== CASE: a=(1 2 =====


  a=(1 2
        ^
[ -c flag ]:1: Unexpected token in array literal

===== CASE: a=(1 ${2@} ) =====


  a=(1 ${2@} )
          ^
[ -c flag ]:1: Unexpected token in ${} (VOp3)

===== CASE: echo ${x/} =====


  echo ${x/}
           ^
[ -c flag ]:1: Pattern in ${x/pat/replace} must not be empty

===== CASE: echo ${x//} =====


  echo ${x//}
             ^
[ -c flag ]:1: Expected } or / to close pattern

===== CASE: echo ${x///foo} =====


  echo ${x///foo}
             ^~~
[ -c flag ]:1: Expected } or / to close pattern

===== CASE: "unterminated double =====


  "unterminated double
  ^
[ -c flag ]:1: Unexpected EOF reading double-quoted string that began here

===== CASE: 'unterminated single =====


  'unterminated single
  ^
[ -c flag ]:1: Unexpected EOF in single-quoted string that began here

===== CASE: 
  "unterminated double multiline
  line 1
  line 2 =====


    "unterminated double multiline
    ^
[ -c flag ]:2: Unexpected EOF reading double-quoted string that began here

===== CASE: 
  'unterminated single multiline
  line 1
  line 2 =====


    'unterminated single multiline
    ^
[ -c flag ]:2: Unexpected EOF in single-quoted string that began here

===== CASE: echo ${x*} =====


  echo ${x*}
          ^
[ -c flag ]:1: Unexpected token in ${} (VOp3)

===== CASE: echo ${x@} =====


  echo ${x@}
          ^
[ -c flag ]:1: Unexpected token in ${} (VOp3)

===== CASE: echo ${x.} =====


  echo ${x.}
          ^
[ -c flag ]:1: Expected } to close ${

===== CASE: echo $(( 1 + 2 ; =====


  echo $(( 1 + 2 ;
                 ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Arith_Semi != Id.Arith_RParen)

===== CASE: echo $(( 1 + 2 ); =====


  echo $(( 1 + 2 );
                  ^
[ -c flag ]:1: Expected second ) to end arith sub

===== CASE: echo $((  =====


  echo $((
           ^
[ -c flag ]:1: Unexpected end of input

===== CASE: echo $(( 1 =====


  echo $(( 1
            ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Eof_Real != Id.Arith_RParen)

===== CASE: (( 1 + 2 / =====


  (( 1 + 2 /
            ^
[ -c flag ]:1: Unexpected end of input

===== CASE: (( 1 + 2 )/ =====


  (( 1 + 2 )/
            ^
[ -c flag ]:1: Expected second ) to end arith statement

===== CASE: (( 1 =====


  (( 1
      ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Eof_Real != Id.Arith_RParen)

===== CASE: (( =====


  ((
    ^
[ -c flag ]:1: Unexpected end of input

===== CASE: a[x+]=1 =====


  a[x+]=1
      ^
[ array place in [ -c flag ] ]:1: Unexpected end of input

===== CASE: a[]=1 =====


  a[]=1
    ^
[ array place in [ -c flag ] ]:1: Unexpected end of input

===== CASE: a[*]=1 =====


  a[*]=1
    ^
[ array place in [ -c flag ] ]:1: Token can't be used in prefix position

===== CASE: (( a + { )) =====


  (( a + { ))
         ^
[ -c flag ]:1: Unexpected token while parsing arithmetic: '{'

===== CASE: (( a + } )) =====


  (( a + } ))
         ^
[ -c flag ]:1: Token can't be used in prefix position

===== CASE: echo $((a b)) =====


  echo $((a b))
            ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Word_Compound != Id.Arith_RParen)

===== CASE: ((a b)) =====


  ((a b))
      ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Word_Compound != Id.Arith_RParen)

===== CASE: for ((x=0; x<5; x++)); do echo $x; done =====


(command.ForExpr
  keyword: <Id.KW_For for>
  init: 
    (arith_expr.BinaryAssign
      op_id: Id.Arith_Equal
      left: ($ Id.Lit_ArithVarLike x)
      right: {<Id.Lit_Digits 0>}
    )
  cond: 
    (arith_expr.Binary
      op_id: Id.Arith_Less
      left: ($ Id.Lit_ArithVarLike x)
      right: {<Id.Lit_Digits 5>}
    )
  update: (arith_expr.UnaryAssign op_id:Id.Node_PostDPlus child:($ Id.Lit_ArithVarLike x))
  body: 
    (command.DoGroup
      left: <Id.KW_Do do>
      children: [
        (command.Sentence
          child: 
            (command.Simple
              words: [{<echo>} {($ Id.VSub_DollarName x)}]
              redirects: []
              more_env: []
              do_fork: T
            )
          terminator: <Id.Op_Semi _>
        )
      ]
      right: <Id.KW_Done done>
    )
  redirects: []
)

===== CASE: for ((; x<5; x++)); do echo $x; done =====


(command.ForExpr
  keyword: <Id.KW_For for>
  cond: 
    (arith_expr.Binary
      op_id: Id.Arith_Less
      left: ($ Id.Lit_ArithVarLike x)
      right: {<Id.Lit_Digits 5>}
    )
  update: (arith_expr.UnaryAssign op_id:Id.Node_PostDPlus child:($ Id.Lit_ArithVarLike x))
  body: 
    (command.DoGroup
      left: <Id.KW_Do do>
      children: [
        (command.Sentence
          child: 
            (command.Simple
              words: [{<echo>} {($ Id.VSub_DollarName x)}]
              redirects: []
              more_env: []
              do_fork: T
            )
          terminator: <Id.Op_Semi _>
        )
      ]
      right: <Id.KW_Done done>
    )
  redirects: []
)

===== CASE: for ((; ; x++)); do echo $x; done =====


(command.ForExpr
  keyword: <Id.KW_For for>
  update: (arith_expr.UnaryAssign op_id:Id.Node_PostDPlus child:($ Id.Lit_ArithVarLike x))
  body: 
    (command.DoGroup
      left: <Id.KW_Do do>
      children: [
        (command.Sentence
          child: 
            (command.Simple
              words: [{<echo>} {($ Id.VSub_DollarName x)}]
              redirects: []
              more_env: []
              do_fork: T
            )
          terminator: <Id.Op_Semi _>
        )
      ]
      right: <Id.KW_Done done>
    )
  redirects: []
)

===== CASE: for ((; ;)); do echo $x; done =====


(command.ForExpr
  keyword: <Id.KW_For for>
  body: 
    (command.DoGroup
      left: <Id.KW_Do do>
      children: [
        (command.Sentence
          child: 
            (command.Simple
              words: [{<echo>} {($ Id.VSub_DollarName x)}]
              redirects: []
              more_env: []
              do_fork: T
            )
          terminator: <Id.Op_Semi _>
        )
      ]
      right: <Id.KW_Done done>
    )
  redirects: []
)

===== CASE: for ((x=0; x<5; x++ b)); do echo $x; done =====


  for ((x=0; x<5; x++ b)); do echo $x; done
                      ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Word_Compound != Id.Arith_RParen)

===== CASE: for ((x=0 b; x<5; x++)); do echo $x; done =====


  for ((x=0 b; x<5; x++)); do echo $x; done
            ^
[ -c flag ]:1: Expected ; here

===== CASE: for ((x=0; x<5 b; x++)); do echo $x; done =====


  for ((x=0; x<5 b; x++)); do echo $x; done
                 ^
[ -c flag ]:1: Expected ; here

===== CASE: ${a:1+2 b} =====


  ${a:1+2 b}
           ^
[ -c flag ]:1: Expected : or } in slice

===== CASE: ${a:1+2:3+4 b} =====


  ${a:1+2:3+4 b}
              ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Word_Compound != Id.Arith_RBrace)

===== CASE: ${a[1+2 b]} =====


  ${a[1+2 b]}
          ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Word_Compound != Id.Arith_RBracket)

===== CASE: $(( 1 + + )) =====


  $(( 1 + + ))
            ^
[ -c flag ]:1: Token can't be used in prefix position

===== CASE: $(( 1 2 )) =====


  $(( 1 2 ))
        ^
[ -c flag ]:1: Unexpected token after arithmetic expression (Id.Word_Compound != Id.Arith_RParen)

===== CASE: $(( - ; )) =====


  $(( - ; ))
        ^
[ -c flag ]:1: Token can't be used in prefix position

===== CASE: $(( ` )) =====


  $(( ` ))
      ^
[ -c flag ]:1: Unexpected EOF while looking for closing backtick

===== CASE: $(( $ )) =====


  $(( $ ))
      ^
[ -c flag ]:1: Unexpected token while parsing arithmetic: '$'

===== CASE: $(( x+1 = 42 )) =====


  $(( x+1 = 42 ))
          ^
[ -c flag ]:1: Left-hand side of this assignment is invalid

===== CASE: $(( (x+42)++ )) =====


  $(( (x+42)++ ))
            ^~
[ -c flag ]:1: Left-hand side of this assignment is invalid

===== CASE: $(( ++(x+42) )) =====


  $(( ++(x+42) ))
      ^~
[ -c flag ]:1: Left-hand side of this assignment is invalid

===== CASE: [[ a b ]] =====


  [[ a b ]]
       ^
[ -c flag ]:1: Expected ]]

===== CASE: [[ a "a"$(echo hi)"b" ]] =====


  [[ a "a"$(echo hi)"b" ]]
       ^
[ -c flag ]:1: Expected ]]

===== CASE: [[ a == ]] =====


  [[ a == ]]
            ^
[ -c flag ]:1: Expected ]]

===== CASE: [[ ( 1 == 2 - ]] =====


  [[ ( 1 == 2 - ]]
              ^
[ -c flag ]:1: Expected ), got word.Compound

===== CASE: [[ == ]] =====


  [[ == ]]
     ^~
[ -c flag ]:1: Unexpected token in boolean expression (Id.BoolBinary_GlobDEqual)

===== CASE: [[ ) ]] =====


  [[ ) ]]
     ^
[ -c flag ]:1: Unexpected token in boolean expression (Id.Op_RParen)

===== CASE: [[ ( ]] =====


  [[ ( ]]
       ^~
[ -c flag ]:1: Unexpected token in boolean expression (Id.Lit_DRightBracket)

===== CASE: [[ ;;; ]] =====


  [[ ;;; ]]
     ^~
[ -c flag ]:1: Unexpected token in boolean expression (Id.Op_DSemi)

===== CASE: [[ =====


  [[
    ^
[ -c flag ]:1: Unexpected token in boolean expression (Id.Eof_Real)

===== CASE: [[ ( a == b foo${var} ]] =====


  [[ ( a == b foo${var} ]]
              ^~~
[ -c flag ]:1: Expected ), got word.Compound

===== CASE: [ x -a y f ] =====


  [ x -a y f ]
           ^
[ -c flag ]:1: (test) Unexpected trailing word 'f'

===== CASE: test x -a y f =====


  test x -a y f
              ^
[ -c flag ]:1: (test) Unexpected trailing word 'f'

===== CASE: [ x  =====


  [ x
  ^
[ -c flag ]:1: missing closing ]

===== CASE: [ x x ] =====


  [ x x ]
    ^
[ -c flag ]:1: (test) Expected unary operator, got 'x' (2 args)

===== CASE: [ x x "a b" ] =====


  [ x x "a b" ]
      ^
[ -c flag ]:1: (test) Expected binary operator, got 'x' (3 args)

===== CASE: [ -t xxx ] =====


  [ -t xxx ]
       ^~~
[ -c flag ]:1: (test) Invalid file descriptor 'xxx'

===== CASE: [ \( x -a -y -a z ] =====


[??? no location ???] (test) Expected ), got EOF

===== CASE: printf % =====


  %
   ^
[ printf word at line 1 of [ -c flag ] ]:1: Expected a printf format character

===== CASE: printf [%Z] =====


  [%Z]
    ^
[ printf word at line 1 of [ -c flag ] ]:1: Invalid printf format character

===== CASE: printf -v "-invalid-" %s foo =====


  -invalid-
           ^
[ dynamic place word at ? ]:1: Unexpected end of input
  printf -v "-invalid-" %s foo
  ^~~~~~
[ -c flag ]:1: 'printf' got invalid place expression

===== CASE: shift 1 2 =====


  shift 1 2
  ^~~~~
[ -c flag ]:1: 'shift' got too many arguments

===== CASE: shift zzz =====


  shift zzz
  ^~~~~
[ -c flag ]:1: 'shift' Invalid shift argument 'zzz'

===== CASE: pushd x y =====


  pushd x y
          ^
[ -c flag ]:1: 'pushd' got too many arguments

===== CASE: pwd -x =====


  pwd -x
      ^~
[ -c flag ]:1: 'pwd' doesn't accept flag -x

===== CASE: pp x foo a-x =====


  pp x foo a-x
     ^
[ -c flag ]:1: 'pp' got invalid action 'x'

===== CASE: wait zzz =====


  wait zzz
       ^~~
[ -c flag ]:1: 'wait' expected PID or jobspec, got 'zzz'

===== CASE: wait %jobspec-not-supported =====


  wait %jobspec-not-supported
       ^
[ -c flag ]:1: 'wait' doesn't support bash-style jobspecs (got '%jobspec-not-supported')

===== CASE: unset invalid-var-name =====


  unset invalid-var-name
  ^~~~~
[ -c flag ]:1: fatal: Invalid place to modify

===== CASE: getopts hc: invalid-var-name =====


  getopts hc: invalid-var-name
              ^~~~~~~~~~~~~~~~
[ -c flag ]:1: 'getopts' got invalid variable name 'invalid-var-name'

===== CASE: read -x =====


  read -x
       ^~
[ -c flag ]:1: 'read' doesn't accept flag -x

===== CASE: builtin read -x =====


  builtin read -x
               ^~
[ -c flag ]:1: 'read' doesn't accept flag -x

===== CASE: read -n =====


  read -n
       ^~
[ -c flag ]:1: 'read' expected argument to '-n'

===== CASE: read -n x =====


  read -n x
          ^
[ -c flag ]:1: 'read' expected integer after -n, got 'x'

===== CASE: set -o errexit +o oops =====


  set -o errexit +o oops
  ^~~
[ -c flag ]:1: 'set' got invalid option 'oops'
osh usage error: got invalid argument 'x' to '-ast-format', expected one of: text|abbrev-text|html|abbrev-html|oheap|none
oil: got invalid option 'oops'

===== CASE: echo {1..3..-1} =====


  echo {1..3..-1}
        ^~~~~~~~
[ -c flag ]:1: Invalid step -1 for ascending integer range

===== CASE: echo {1..3..0} =====


  echo {1..3..0}
        ^~~~~~~
[ -c flag ]:1: Step can't be 0

===== CASE: echo {3..1..1} =====


  echo {3..1..1}
        ^~~~~~~
[ -c flag ]:1: Invalid step 1 for descending integer range

===== CASE: echo {3..1..0} =====


  echo {3..1..0}
        ^~~~~~~
[ -c flag ]:1: Step can't be 0

===== CASE: echo {a..Z} =====


  echo {a..Z}
        ^~~~
[ -c flag ]:1: Mismatched cases in character range

===== CASE: echo {a..z..0} =====


  echo {a..z..0}
        ^~~~~~~
[ -c flag ]:1: Step can't be 0

===== CASE: echo {a..z..-1} =====


  echo {a..z..-1}
        ^~~~~~~~
[ -c flag ]:1: Invalid step -1 for ascending character range

===== CASE: echo {z..a..1} =====


  echo {z..a..1}
        ^~~~~~~
[ -c flag ]:1: Invalid step 1 for descending character range

===== CASE: var x = 1 +  =====


  var x = 1 +
              ^
[ -c flag ]:1: Syntax error in expression (near Id.Eof_Real)

===== CASE: var x = *  =====


  var x = *
          ^
[ -c flag ]:1: Syntax error in expression (near Id.Arith_Star)

===== CASE: var x = @($(cat <<EOF
here doc
EOF
)) =====


  var x = @($(cat <<EOF
          ^~
[ -c flag ]:1: Here docs aren't allowed in expressions

===== CASE: var x = $(var x = 1)) =====


  var x = $(var x = 1))
                     ^
[ -c flag ]:1: Syntax error in expression (near Id.Eof_RParen)

===== CASE: append =====


  append
  ^~~~~~
[ -c flag ]:1: 'append' requires a variable name

===== CASE: append invalid- =====


  append invalid-
         ^~~~~~~~
[ -c flag ]:1: 'append' got invalid variable name 'invalid-'

===== CASE: >out { echo hi } =====


  >out { echo hi }
       ^
[ -c flag ]:1: Unexpected typed args

===== CASE: a=1 b=2 { echo hi } =====


  a=1 b=2 { echo hi }
  ^~
[ -c flag ]:1: Use const or var/setvar to assign in Oil (parse_sh_assign)

===== CASE: break { echo hi } =====


  break { echo hi }
        ^
[ -c flag ]:1: Unexpected typed args

===== CASE: cd / { echo hi } cd / =====


  cd / { echo hi } cd /
                   ^~
[ -c flag ]:1: Invalid word while parsing command line

===== CASE: if test -f foo{ echo hi } =====


  if test -f foo{ echo hi }
             ^~~
[ -c flag ]:1: Word has unbalanced { }.  Maybe add a space or quote it like \{

===== CASE: var x = / ! / =====


  var x = / ! /
              ^
[ -c flag ]:1: Syntax error in expression (near Id.Arith_Slash)

===== CASE: var x = / ![a-z] / =====


(command.VarDecl
  keyword: <Id.KW_Var var>
  lhs: [(NameType name:<Id.Expr_Name x>)]
  rhs: 
    (expr.RegexLiteral
      left: <Id.Arith_Slash _>
      regex: 
        (re.CharClassLiteral
          negated: T
          terms: [(class_literal_term.Range start:<Id.Expr_Name a> end:<Id.Expr_Name z>)]
        )
      flags: []
    )
)

===== CASE: var x = / !d / =====


(command.VarDecl
  keyword: <Id.KW_Var var>
  lhs: [(NameType name:<Id.Expr_Name x>)]
  rhs: 
    (expr.RegexLiteral
      left: <Id.Arith_Slash _>
      regex: (PerlClass negated:<Id.Expr_Bang '!'> name:d)
      flags: []
    )
)

===== CASE: var x = / !! / =====


  var x = / !! /
               ^
[ -c flag ]:1: Syntax error in expression (near Id.Arith_Slash)

===== CASE: var x = /[a-zA-Z]/ =====


  var x = /[a-zA-Z]/
                ^
[ -c flag ]:1: Syntax error in expression (near Id.Arith_Minus)

===== CASE: var x = /[a-z0-9]/ =====


  var x = /[a-z0-9]/
                ^
[ -c flag ]:1: Syntax error in expression (near Id.Arith_Minus)

===== CASE: var x = /[a-zz]/ =====


  var x = /[a-zz]/
              ^~
[ -c flag ]:1: Range start/end shouldn't have more than one character

===== CASE: var x = /['ab'-'z']/ =====


  var x = /['ab'-'z']/
            ^
[ -c flag ]:1: Range start/end shouldn't have more than one character

===== CASE: var x = /[$a-${z}]/ =====


  var x = /[$a-${z}]/
              ^
[ -c flag ]:1: Syntax error in expression (near Id.Arith_Minus)

===== CASE: var x = /[abc]/ =====


  var x = /[abc]/
            ^~~
[ -c flag ]:1: 'abc' isn't a character class

===== CASE: var x = /[% _]/ =====


  var x = /[% _]/
            ^
[ -c flag ]:1: Syntax error in expression (near Id.Arith_Percent)

===== CASE: proc f[] { echo hi } =====


  proc f[] { echo hi }
       ^~
[ -c flag ]:1: Invalid proc name 'f['

===== CASE: proc : { echo hi } =====


  proc : { echo hi }
       ^
[ -c flag ]:1: Invalid proc name ':'

===== CASE: proc foo::bar { echo hi } =====


  proc foo::bar { echo hi }
          ^~
[ -c flag ]:1: Syntax error in expression (near Id.Expr_DColon)

===== CASE: json write (x) =====


(command.Simple
  words: [{<json>} {<write>}]
  redirects: []
  more_env: []
  typed_args: 
    (ArgList
      left: <Id.Op_LParen _>
      positional: [(expr.Var name:<Id.Expr_Name x>)]
      named: []
      right: <Id.Op_RParen _>
    )
  do_fork: T
)

===== CASE: echo $(json write (x)) =====


(command.Simple
  words: [
    {<echo>}
    {
      (CommandSub
        left_token: <Id.Left_DollarParen '$('>
        child: 
          (command.Simple
            words: [{<json>} {<write>}]
            redirects: []
            more_env: []
            typed_args: 
              (ArgList
                left: <Id.Op_LParen _>
                positional: [(expr.Var name:<Id.Expr_Name x>)]
                named: []
                right: <Id.Op_RParen _>
              )
            do_fork: T
          )
        right: <Id.Eof_RParen _>
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: var result = $(json write (x)) =====


(command.VarDecl
  keyword: <Id.KW_Var var>
  lhs: [(NameType name:<Id.Expr_Name result>)]
  rhs: 
    (CommandSub
      left_token: <Id.Left_DollarParen '$('>
      child: 
        (command.Simple
          words: [{<json>} {<write>}]
          redirects: []
          more_env: []
          typed_args: 
            (ArgList
              left: <Id.Op_LParen _>
              positional: [(expr.Var name:<Id.Expr_Name x>)]
              named: []
              right: <Id.Op_RParen _>
            )
          do_fork: T
        )
      right: <Id.Eof_RParen _>
    )
)

===== CASE: json write (x, y); echo hi =====


(command.CommandList
  children: [
    (command.Sentence
      child: 
        (command.Simple
          words: [{<json>} {<write>}]
          redirects: []
          more_env: []
          typed_args: 
            (ArgList
              left: <Id.Op_LParen _>
              positional: [(expr.Var name:<Id.Expr_Name x>) (expr.Var name:<Id.Expr_Name y>)]
              named: []
              right: <Id.Op_RParen _>
            )
          do_fork: T
        )
      terminator: <Id.Op_Semi _>
    )
    (command.Simple words:[{<echo>} {<hi>}] redirects:[] more_env:[] do_fork:T)
  ]
)

===== CASE: 
json write (x, name = "value")
echo hi
 =====


(command.CommandList
  children: [
    (command.Simple
      words: [{<json>} {<write>}]
      redirects: []
      more_env: []
      typed_args: 
        (ArgList
          left: <Id.Op_LParen _>
          positional: [(expr.Var name:<Id.Expr_Name x>)]
          named: [(NamedArg name:<Id.Expr_Name name> value:(DQ <value>))]
          right: <Id.Op_RParen _>
        )
      do_fork: T
    )
    (command.Simple words:[{<echo>} {<hi>}] redirects:[] more_env:[] do_fork:T)
  ]
)

===== CASE: json write (x) { echo hi } =====


(command.Simple
  words: [{<json>} {<write>}]
  redirects: []
  more_env: []
  typed_args: 
    (ArgList
      left: <Id.Op_LParen _>
      positional: [(expr.Var name:<Id.Expr_Name x>)]
      named: []
      right: <Id.Op_RParen _>
    )
  block: 
    (BlockArg
      brace_group: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [(command.Simple words:[{<echo>} {<hi>}] redirects:[] more_env:[] do_fork:T)]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
      lines: [(SourceLine line_num:1 content:'json write (x) { echo hi }' src:(source.CFlag))]
    )
  do_fork: T
)

===== CASE: 
json write (x) {
  echo hi
} =====


(command.Simple
  words: [{<json>} {<write>}]
  redirects: []
  more_env: []
  typed_args: 
    (ArgList
      left: <Id.Op_LParen _>
      positional: [(expr.Var name:<Id.Expr_Name x>)]
      named: []
      right: <Id.Op_RParen _>
    )
  block: 
    (BlockArg
      brace_group: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [(command.Simple words:[{<echo>} {<hi>}] redirects:[] more_env:[] do_fork:T)]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
      lines: [
        (SourceLine line_num:2 content:'json write (x) {\n' src:(source.CFlag))
        (SourceLine line_num:3 content:'  echo hi\n' src:(source.CFlag))
        (SourceLine line_num:4 content:'}' src:(source.CFlag))
      ]
    )
  do_fork: T
)

===== CASE: json write (
      x,
      y,
      z
    ) =====


(command.Simple
  words: [{<json>} {<write>}]
  redirects: []
  more_env: []
  typed_args: 
    (ArgList
      left: <Id.Op_LParen _>
      positional: [
        (expr.Var name:<Id.Expr_Name x>)
        (expr.Var name:<Id.Expr_Name y>)
        (expr.Var name:<Id.Expr_Name z>)
      ]
      named: []
      right: <Id.Op_RParen _>
    )
  do_fork: T
)

===== CASE: json write () =====


  json write ()
             ^
[ -c flag ]:1: Empty arg list not allowed

===== CASE: json write ( ) =====


  json write ( )
             ^
[ -c flag ]:1: Empty arg list not allowed

===== CASE: json write(x) =====


  json write(x)
            ^
[ -c flag ]:1: Space required before (

===== CASE: json write() =====


  json write()
            ^
[ -c flag ]:1: Space required before (

===== CASE: f(x) =====


  f(x)
   ^
[ -c flag ]:1: Space required before (

===== CASE: = 5 mod 3 =====


  = 5 mod 3
      ^~~
[ -c flag ]:1: Syntax error in expression (near Id.Expr_Name)

===== CASE: = >>= =====


  = >>=
    ^~~
[ -c flag ]:1: Syntax error in expression (near Id.Arith_DGreatEqual)

===== CASE: = %( =====


  = %(
      ^
[ -c flag ]:1: Unexpected token in array literal

===== CASE: = 42, =====


  = 42,
      ^
[ -c flag ]:1: Write singleton tuples with tup(), not a trailing comma

===== CASE: = (42,) =====


  = (42,)
       ^
[ -c flag ]:1: Write singleton tuples with tup(), not a trailing comma

===== CASE: =a =====


  =a
  ^
[ -c flag ]:1: =word isn't allowed.  Hint: either quote it or add a space after =
to pretty print an expression

===== CASE: if (5 == 5) { echo yes } =====


  if (5 == 5) { echo yes }
        ^~
[ -c flag ]:1: Use === to be exact, or ~== to convert types

===== CASE: 
name=val
 =====


  name=val
  ^~~~~
[ -c flag ]:2: Use const or var/setvar to assign in Oil (parse_sh_assign)

===== CASE: 
name = val
 =====


  name = val
       ^
[ -c flag ]:2: Unexpected = (Hint: use const/var/setvar, or quote it)

===== CASE: 
rule {
  x = 42
}
 =====


    x = 42
      ^
[ -c flag ]:3: Unexpected = (Hint: use const/var/setvar, or quote it)

===== CASE: 
RULE {
  x = 42
}
 =====


    x = 42
      ^
[ -c flag ]:3: Unexpected = (Hint: use const/var/setvar, or quote it)

===== CASE: 
Rule {
  x = 42
}
 =====


(command.Simple
  words: [{<Rule>}]
  redirects: []
  more_env: []
  block: 
    (BlockArg
      brace_group: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [(command.VarDecl lhs:[(NameType name:<x>)] rhs:(expr.Const c:<Id.Expr_DecInt 42>))]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
      lines: [
        (SourceLine line_num:2 content:'Rule {\n' src:(source.CFlag))
        (SourceLine line_num:3 content:'  x = 42\n' src:(source.CFlag))
        (SourceLine line_num:4 content:'}\n' src:(source.CFlag))
      ]
    )
  do_fork: T
)

===== CASE: 
Rule X Y {
  x = 42
}
 =====


(command.Simple
  words: [{<Rule>} {<X>} {<Y>}]
  redirects: []
  more_env: []
  block: 
    (BlockArg
      brace_group: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [(command.VarDecl lhs:[(NameType name:<x>)] rhs:(expr.Const c:<Id.Expr_DecInt 42>))]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
      lines: [
        (SourceLine line_num:2 content:'Rule X Y {\n' src:(source.CFlag))
        (SourceLine line_num:3 content:'  x = 42\n' src:(source.CFlag))
        (SourceLine line_num:4 content:'}\n' src:(source.CFlag))
      ]
    )
  do_fork: T
)

===== CASE: 
RULe {   # inconsistent but OK
  x = 42
}
 =====


(command.Simple
  words: [{<RULe>}]
  redirects: []
  more_env: []
  block: 
    (BlockArg
      brace_group: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [(command.VarDecl lhs:[(NameType name:<x>)] rhs:(expr.Const c:<Id.Expr_DecInt 42>))]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
      lines: [
        (SourceLine line_num:2 content:'RULe {   # inconsistent but OK\n' src:(source.CFlag))
        (SourceLine line_num:3 content:'  x = 42\n' src:(source.CFlag))
        (SourceLine line_num:4 content:'}\n' src:(source.CFlag))
      ]
    )
  do_fork: T
)

===== CASE: 
hay eval :result {

  Rule {
    foo = 42
  }

  bar = 43   # parse error here
}
 =====


    bar = 43   # parse error here
        ^
[ -c flag ]:8: Unexpected = (Hint: use const/var/setvar, or quote it)

===== CASE: 
hay define TASK

TASK build {
  foo = 42
}
 =====


    foo = 42
        ^
[ -c flag ]:5: Unexpected = (Hint: use const/var/setvar, or quote it)

===== CASE: 
hay define Package/TASK

Package libc {
  TASK build {
    foo = 42
  }
}
 =====


      foo = 42
          ^
[ -c flag ]:6: Unexpected = (Hint: use const/var/setvar, or quote it)

===== CASE: echo $'\u{03bc' =====


(command.Simple
  words: [
    {<echo>}
    {
      (SingleQuoted
        left: <Id.Left_DollarSingleQuote '$\''>
        tokens: [<Id.Unknown_Backslash '\\'> <Id.Char_Literals 'u{03bc'>]
        right: <Id.Right_SingleQuote '\''>
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: +O parse_backslash -n -c echo parse_backslash $'\u{03bc' =====


  echo parse_backslash $'\u{03bc'
                         ^
[ -c flag ]:1: Invalid char escape in C-style string literal

===== CASE: const bad = $'\u{03bc' =====


  const bad = $'\u{03bc'
                ^
[ -c flag ]:1: Invalid char escape in C-style string literal

===== CASE: echo $'\z' =====


(command.Simple
  words: [
    {<echo>}
    {
      (SingleQuoted
        left: <Id.Left_DollarSingleQuote '$\''>
        tokens: [<Id.Unknown_Backslash '\\'> <Id.Char_Literals z>]
        right: <Id.Right_SingleQuote '\''>
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: const bad = $'\z' =====


  const bad = $'\z'
                ^
[ -c flag ]:1: Invalid char escape in C-style string literal

===== CASE: echo $'\101' =====


(command.Simple
  words: [
    {<echo>}
    {
      (SingleQuoted
        left: <Id.Left_DollarSingleQuote '$\''>
        tokens: [<Id.Char_Octal3 '\\101'>]
        right: <Id.Right_SingleQuote '\''>
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: const bad = $'\101' =====


  const bad = $'\101'
                ^~~~
[ -c flag ]:1: Use \xhh or \u{...} instead of octal escapes in Oil strings

===== CASE: const bad = c'\xf' =====


  const bad = c'\xf'
               ^
[ -c flag ]:1: Syntax error in expression (near Id.Left_SingleQuote)

===== CASE: echo "\z" =====


(command.Simple
  words: [{<echo>} {(DQ <Id.Lit_BadBackslash '\\'> <z>)}]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: +O parse_backslash -n -c echo parse_backslash "\z" =====


  echo parse_backslash "\z"
                        ^
[ -c flag ]:1: Invalid char escape in double quoted string

===== CASE: echo "\z" =====


  echo "\z"
        ^
[ -c flag ]:1: Invalid char escape in double quoted string

===== CASE: const bad = "\z" =====


  const bad = "\z"
               ^
[ -c flag ]:1: Invalid char escape in double quoted string

===== CASE: echo "\u1234" =====


(command.Simple
  words: [{<echo>} {(DQ <Id.Lit_BadBackslash '\\'> <u1234>)}]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: echo "\u1234" =====


  echo "\u1234"
        ^
[ -c flag ]:1: Invalid char escape in double quoted string

===== CASE: const bad = "\u1234" =====


  const bad = "\u1234"
               ^
[ -c flag ]:1: Invalid char escape in double quoted string

===== CASE: echo "`echo hi`" =====


(command.Simple
  words: [
    {<echo>}
    {
      (DQ 
        (CommandSub
          left_token: <Id.Left_Backtick '`'>
          child: (command.Simple words:[{<echo>} {<hi>}] redirects:[] more_env:[] do_fork:T)
          right: <Id.Backtick_Right '`'>
        )
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: echo "`echo hi`" =====


  echo "`echo hi`"
        ^
[ -c flag ]:1: Use $(cmd) instead of backticks (parse_backticks)

===== CASE: const bad = "`echo hi`" =====


  const bad = "`echo hi`"
               ^
[ -c flag ]:1: Invalid backtick: use $(cmd) or \` in Oil strings

===== CASE: setvar x = "\z" =====


  setvar x = "\z"
              ^
[ -c flag ]:1: Invalid char escape in double quoted string

===== CASE: =====


osh usage error: expected argument to '-c'

===== CASE: echo `echo hi` =====


(command.Simple
  words: [
    {<echo>}
    {
      (CommandSub
        left_token: <Id.Left_Backtick '`'>
        child: (command.Simple words:[{<echo>} {<hi>}] redirects:[] more_env:[] do_fork:T)
        right: <Id.Backtick_Right '`'>
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: echo "foo = `echo hi`" =====


(command.Simple
  words: [
    {<echo>}
    {
      (DQ <'foo = '> 
        (CommandSub
          left_token: <Id.Left_Backtick '`'>
          child: (command.Simple words:[{<echo>} {<hi>}] redirects:[] more_env:[] do_fork:T)
          right: <Id.Backtick_Right '`'>
        )
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: +O parse_backticks -n -c echo `echo hi` =====


  echo `echo hi`
       ^
[ -c flag ]:1: Use $(cmd) instead of backticks (parse_backticks)

===== CASE: +O parse_backticks -n -c echo "foo = `echo hi`" =====


  echo "foo = `echo hi`"
              ^
[ -c flag ]:1: Use $(cmd) instead of backticks (parse_backticks)

===== CASE: echo $ =====


(command.Simple words:[{<echo>} {<Id.Lit_Dollar '$'>}] redirects:[] more_env:[] do_fork:T)

===== CASE: +O parse_dollar -n -c echo $ =====


  echo $
       ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo $ =====


  echo $
       ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo $: =====


(command.Simple
  words: [{<echo>} {<Id.Lit_Dollar '$'> <Id.Lit_Colon ':'>}]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: +O parse_dollar -n -c echo $: =====


  echo $:
       ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo $: =====


  echo $:
       ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo "$" =====


(command.Simple words:[{<echo>} {(DQ <Id.Lit_Dollar '$'>)}] redirects:[] more_env:[] do_fork:T)

===== CASE: +O parse_dollar -n -c echo "$" =====


  echo "$"
        ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo "$" =====


  echo "$"
        ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo "$:" =====


(command.Simple words:[{<echo>} {(DQ <Id.Lit_Dollar '$'> <':'>)}] redirects:[] more_env:[] do_fork:T)

===== CASE: +O parse_dollar -n -c echo "$:" =====


  echo "$:"
        ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo "$:" =====


  echo "$:"
        ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo ${x:-$} =====


(command.Simple
  words: [
    {<echo>}
    {
      (BracedVarSub
        left: <Id.Left_DollarBrace '${'>
        token: <Id.VSub_Name x>
        var_name: x
        suffix_op: (suffix_op.Unary op:<Id.VTest_ColonHyphen _> arg_word:{<Id.Lit_Dollar '$'>})
        right: <Id.Right_DollarBrace '}'>
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: +O parse_dollar -n -c echo ${x:-$} =====


  echo ${x:-$}
            ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo ${x:-$} =====


  echo ${x:-$}
            ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo ${x:-$:} =====


(command.Simple
  words: [
    {<echo>}
    {
      (BracedVarSub
        left: <Id.Left_DollarBrace '${'>
        token: <Id.VSub_Name x>
        var_name: x
        suffix_op: (suffix_op.Unary op:<Id.VTest_ColonHyphen _> arg_word:{<Id.Lit_Dollar '$'> <':'>})
        right: <Id.Right_DollarBrace '}'>
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: +O parse_dollar -n -c echo ${x:-$:} =====


  echo ${x:-$:}
            ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo ${x:-$:} =====


  echo ${x:-$:}
            ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo "${x:-$}" =====


(command.Simple
  words: [
    {<echo>}
    {
      (DQ 
        (BracedVarSub
          left: <Id.Left_DollarBrace '${'>
          token: <Id.VSub_Name x>
          var_name: x
          suffix_op: (suffix_op.Unary op:<Id.VTest_ColonHyphen _> arg_word:{<Id.Lit_Dollar '$'>})
          right: <Id.Right_DollarBrace '}'>
        )
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: +O parse_dollar -n -c echo "${x:-$}" =====


  echo "${x:-$}"
             ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo "${x:-$}" =====


  echo "${x:-$}"
             ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo "${x:-$:}" =====


(command.Simple
  words: [
    {<echo>}
    {
      (DQ 
        (BracedVarSub
          left: <Id.Left_DollarBrace '${'>
          token: <Id.VSub_Name x>
          var_name: x
          suffix_op: (suffix_op.Unary op:<Id.VTest_ColonHyphen _> arg_word:{<Id.Lit_Dollar '$'> <':'>})
          right: <Id.Right_DollarBrace '}'>
        )
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: +O parse_dollar -n -c echo "${x:-$:}" =====


  echo "${x:-$:}"
             ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo "${x:-$:}" =====


  echo "${x:-$:}"
             ^
[ -c flag ]:1: Literal $ should be quoted like \$

===== CASE: echo \( =====


(command.Simple
  words: [{<echo>} {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\('> ch:'(')}]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: echo \; =====


(command.Simple
  words: [{<echo>} {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\;'> ch:';')}]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: echo ~ =====


(command.Simple
  words: [{<echo>} {(word_part.TildeSub token:<Id.Lit_TildeLike '~'>)}]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: echo \! =====


(command.Simple
  words: [{<echo>} {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\!'> ch:'!')}]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: echo \% =====


(command.Simple
  words: [{<echo>} {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\%'> ch:'%')}]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: echo \# =====


(command.Simple
  words: [{<echo>} {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\#'> ch:'#')}]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: echo \. =====


  echo \.
       ^~
[ -c flag ]:1: Invalid char escape (parse_backslash)

===== CASE: echo \- =====


  echo \-
       ^~
[ -c flag ]:1: Invalid char escape (parse_backslash)

===== CASE: echo \/ =====


  echo \/
       ^~
[ -c flag ]:1: Invalid char escape (parse_backslash)

===== CASE: echo \a =====


  echo \a
       ^~
[ -c flag ]:1: Invalid char escape (parse_backslash)

===== CASE: echo \Z =====


  echo \Z
       ^~
[ -c flag ]:1: Invalid char escape (parse_backslash)

===== CASE: echo \0 =====


  echo \0
       ^~
[ -c flag ]:1: Invalid char escape (parse_backslash)

===== CASE: echo \9 =====


  echo \9
       ^~
[ -c flag ]:1: Invalid char escape (parse_backslash)

===== CASE: echo \. \- \/ \a \Z \0 \9 =====


(command.Simple
  words: [
    {<echo>}
    {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\.'> ch:.)}
    {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\-'> ch:-)}
    {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\/'> ch:'/')}
    {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\a'> ch:a)}
    {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\Z'> ch:Z)}
    {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\0'> ch:0)}
    {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\9'> ch:9)}
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: ((1 > 0 && 43 > 42)) =====


(command.DParen
  child: 
    (arith_expr.Binary
      op_id: Id.Arith_DAmp
      left: (arith_expr.Binary op_id:Id.Arith_Great left:{<Id.Lit_Digits 1>} right:{<Id.Lit_Digits 0>})
      right: 
        (arith_expr.Binary
          op_id: Id.Arith_Great
          left: {<Id.Lit_Digits 43>}
          right: {<Id.Lit_Digits 42>}
        )
    )
  redirects: []
)

===== CASE: ((1 > 0 && 43 > 42)) =====


  ((1 > 0 && 43 > 42))
  ^~
[ -c flag ]:1: You may want a space between parens (parse_dparen)

===== CASE: if ((1 > 0 && 43 > 42)); then echo yes; fi =====


(command.If
  if_kw: <Id.KW_If if>
  arms: [
    (IfArm
      keyword: <Id.KW_If if>
      cond: 
        (condition.Shell
          commands: [
            (command.Sentence
              child: 
                (command.DParen
                  child: 
                    (arith_expr.Binary
                      op_id: Id.Arith_DAmp
                      left: 
                        (arith_expr.Binary
                          op_id: Id.Arith_Great
                          left: {<Id.Lit_Digits 1>}
                          right: {<Id.Lit_Digits 0>}
                        )
                      right: 
                        (arith_expr.Binary
                          op_id: Id.Arith_Great
                          left: {<Id.Lit_Digits 43>}
                          right: {<Id.Lit_Digits 42>}
                        )
                    )
                  redirects: []
                )
              terminator: <Id.Op_Semi _>
            )
          ]
        )
      then_kw: <Id.KW_Then then>
      action: [
        (command.Sentence
          child: (command.Simple words:[{<echo>} {<yes>}] redirects:[] more_env:[] do_fork:T)
          terminator: <Id.Op_Semi _>
        )
      ]
      spids: [0 20]
    )
  ]
  else_action: []
  fi_kw: <Id.KW_Fi fi>
  redirects: []
)

===== CASE: if ((1 > 0 && 43 > 42)); then echo yes; fi =====


  if ((1 > 0 && 43 > 42)); then echo yes; fi
     ^~
[ -c flag ]:1: You may want a space between parens (parse_dparen)

===== CASE: for ((x = 1; x < 5; ++x)); do echo $x; done =====


(command.ForExpr
  keyword: <Id.KW_For for>
  init: 
    (arith_expr.BinaryAssign
      op_id: Id.Arith_Equal
      left: ($ Id.Lit_ArithVarLike x)
      right: {<Id.Lit_Digits 1>}
    )
  cond: 
    (arith_expr.Binary
      op_id: Id.Arith_Less
      left: ($ Id.Lit_ArithVarLike x)
      right: {<Id.Lit_Digits 5>}
    )
  update: (arith_expr.UnaryAssign op_id:Id.Arith_DPlus child:($ Id.Lit_ArithVarLike x))
  body: 
    (command.DoGroup
      left: <Id.KW_Do do>
      children: [
        (command.Sentence
          child: 
            (command.Simple
              words: [{<echo>} {($ Id.VSub_DollarName x)}]
              redirects: []
              more_env: []
              do_fork: T
            )
          terminator: <Id.Op_Semi _>
        )
      ]
      right: <Id.KW_Done done>
    )
  redirects: []
)

===== CASE: for ((x = 1; x < 5; ++x)); do echo $x; done =====


  for ((x = 1; x < 5; ++x)); do echo $x; done
      ^~
[ -c flag ]:1: Bash for loops aren't allowed (parse_dparen)

===== CASE: if (1 > 0 and 43 > 42) { echo yes } =====


(command.If
  if_kw: <Id.KW_If if>
  arms: [
    (IfArm
      keyword: <Id.KW_If if>
      cond: 
        (condition.Oil
          e: 
            (expr.Binary
              op: <Id.Expr_And and>
              left: 
                (expr.Compare
                  left: (expr.Const c:<Id.Expr_DecInt 1>)
                  ops: [<Id.Arith_Great _>]
                  comparators: [(expr.Const c:<Id.Expr_DecInt 0>)]
                )
              right: 
                (expr.Compare
                  left: (expr.Const c:<Id.Expr_DecInt 43>)
                  ops: [<Id.Arith_Great _>]
                  comparators: [(expr.Const c:<Id.Expr_DecInt 42>)]
                )
            )
        )
      action: [(command.Simple words:[{<echo>} {<yes>}] redirects:[] more_env:[] do_fork:T)]
      spids: [0]
    )
  ]
  else_action: []
  redirects: []
)

===== CASE: if ( (1 > 0 and 43 > 42) ) { echo yes } =====


(command.If
  if_kw: <Id.KW_If if>
  arms: [
    (IfArm
      keyword: <Id.KW_If if>
      cond: 
        (condition.Oil
          e: 
            (expr.Binary
              op: <Id.Expr_And and>
              left: 
                (expr.Compare
                  left: (expr.Const c:<Id.Expr_DecInt 1>)
                  ops: [<Id.Arith_Great _>]
                  comparators: [(expr.Const c:<Id.Expr_DecInt 0>)]
                )
              right: 
                (expr.Compare
                  left: (expr.Const c:<Id.Expr_DecInt 43>)
                  ops: [<Id.Arith_Great _>]
                  comparators: [(expr.Const c:<Id.Expr_DecInt 42>)]
                )
            )
        )
      action: [(command.Simple words:[{<echo>} {<yes>}] redirects:[] more_env:[] do_fork:T)]
      spids: [0]
    )
  ]
  else_action: []
  redirects: []
)

===== CASE: = =====


  =
   ^
[ -c flag ]:1: Syntax error in expression (near Id.Eof_Real)

===== CASE: _ =====


  _
   ^
[ -c flag ]:1: Syntax error in expression (near Id.Eof_Real)

===== CASE: const d = { name:
42 } =====


  const d = { name:
                   ^
[ -c flag ]:1: Syntax error in expression (near Id.Op_Newline)

===== CASE: proc p { echo 1; proc f { echo f }; echo 2 } =====


  proc p { echo 1; proc f { echo f }; echo 2 }
                   ^~~~
[ -c flag ]:1: procs and shell functions can't be nested

===== CASE: proc p { echo 1; +weird() { echo f; }; echo 2 } =====


  proc p { echo 1; +weird() { echo f; }; echo 2 }
                   ^
[ -c flag ]:1: procs and shell functions can't be nested

===== CASE: proc p { echo 1; function f { echo f; }; echo 2 } =====


  proc p { echo 1; function f { echo f; }; echo 2 }
                   ^~~~~~~~
[ -c flag ]:1: procs and shell functions can't be nested

===== CASE: f() { echo 1; proc inner { echo inner; }; echo 2; } =====


  f() { echo 1; proc inner { echo inner; }; echo 2; }
                ^~~~
[ -c flag ]:1: procs and shell functions can't be nested

===== CASE: f() { echo 1; g() { echo g; }; echo 2; } =====


(command.ShFunction
  name: f
  body: 
    (BraceGroup
      left: <Id.Lit_LBrace '{'>
      children: [
        (command.Sentence
          child: (command.Simple words:[{<echo>} {<1>}] redirects:[] more_env:[] do_fork:T)
          terminator: <Id.Op_Semi _>
        )
        (command.Sentence
          child: 
            (command.ShFunction
              name: g
              body: 
                (BraceGroup
                  left: <Id.Lit_LBrace '{'>
                  children: [
                    (command.Sentence
                      child: 
                        (command.Simple
                          words: [{<echo>} {<g>}]
                          redirects: []
                          more_env: []
                          do_fork: T
                        )
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  redirects: []
                  right: <Id.Lit_RBrace '}'>
                )
            )
          terminator: <Id.Op_Semi _>
        )
        (command.Sentence
          child: (command.Simple words:[{<echo>} {<2>}] redirects:[] more_env:[] do_fork:T)
          terminator: <Id.Op_Semi _>
        )
      ]
      redirects: []
      right: <Id.Lit_RBrace '}'>
    )
)

===== CASE: proc p() { shopt --unset errexit { false hi } } =====


(command.Proc
  keyword: <Id.KW_Proc proc>
  name: <p>
  sig: (proc_sig.Closed untyped:[] typed:[])
  body: 
    (BraceGroup
      left: <Id.KW_Proc proc>
      children: [
        (command.Simple
          words: [{<shopt>} {<--unset>} {<errexit>}]
          redirects: []
          more_env: []
          block: 
            (BlockArg
              brace_group: 
                (BraceGroup
                  left: <Id.Lit_LBrace '{'>
                  children: [
                    (command.Simple
                      words: [{<false>} {<hi>}]
                      redirects: []
                      more_env: []
                      do_fork: T
                    )
                  ]
                  redirects: []
                  right: <Id.Lit_RBrace '}'>
                )
              lines: [
                (SourceLine
                  line_num: 1
                  content: 'proc p() { shopt --unset errexit { false hi } }'
                  src: (source.CFlag)
                )
              ]
            )
          do_fork: T
        )
      ]
      redirects: []
      right: <Id.Lit_RBrace '}'>
    )
)

===== CASE: 
  proc p(x) {
    echo hi
    var x = 2  # Cannot redeclare param
  }
   =====


      var x = 2  # Cannot redeclare param
          ^
[ -c flag ]:4: 'x' was already declared

===== CASE: 
  proc p {
    var x = 1
    echo hi
    var x = 2  # Cannot redeclare local
  }
   =====


      var x = 2  # Cannot redeclare local
          ^
[ -c flag ]:5: 'x' was already declared

===== CASE: 
  proc p {
    var x = 1
    echo hi
    const x = 2  # Cannot redeclare local
  }
   =====


      const x = 2  # Cannot redeclare local
            ^
[ -c flag ]:5: 'x' was already declared

===== CASE: 
  proc p(x, :out) {
    var out = 2   # Cannot redeclare out param
  }
   =====


      var out = 2   # Cannot redeclare out param
          ^~~
[ -c flag ]:3: 'out' was already declared

===== CASE: 
  proc p {
    var out = 2   # Cannot redeclare out param
    cd /tmp { 
      var out = 3
    }
  }
   =====


        var out = 3
            ^~~
[ -c flag ]:5: 'out' was already declared

===== CASE: 
  var x = 1
  proc p {
    echo hi
    var x = 2
  }

  proc p2 {
    var x = 3
  }
   =====


(command.CommandList
  children: [
    (command.VarDecl
      keyword: <Id.KW_Var var>
      lhs: [(NameType name:<Id.Expr_Name x>)]
      rhs: (expr.Const c:<Id.Expr_DecInt 1>)
    )
    (command.Proc
      keyword: <Id.KW_Proc proc>
      name: <p>
      sig: (proc_sig.Open)
      body: 
        (BraceGroup
          left: <Id.KW_Proc proc>
          children: [
            (command.Simple words:[{<echo>} {<hi>}] redirects:[] more_env:[] do_fork:T)
            (command.VarDecl
              keyword: <Id.KW_Var var>
              lhs: [(NameType name:<Id.Expr_Name x>)]
              rhs: (expr.Const c:<Id.Expr_DecInt 2>)
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.Proc
      keyword: <Id.KW_Proc proc>
      name: <p2>
      sig: (proc_sig.Open)
      body: 
        (BraceGroup
          left: <Id.KW_Proc proc>
          children: [
            (command.VarDecl
              keyword: <Id.KW_Var var>
              lhs: [(NameType name:<Id.Expr_Name x>)]
              rhs: (expr.Const c:<Id.Expr_DecInt 3>)
            )
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
  ]
)

===== CASE: 
  proc p(x) {
    var y = 1
    setvar L = "L"  # ERROR: not declared
  }
   =====


      setvar L = "L"  # ERROR: not declared
             ^
[ -c flag ]:4: 'L' hasn't been declared

===== CASE: 
  proc p(x) {
    const c = 123
    setvar c = 42  # ERROR: cannot modify constant
  }
   =====


      setvar c = 42  # ERROR: cannot modify constant
             ^
[ -c flag ]:4: Can't modify constant 'c'

===== CASE: 
  proc p(x) {
    setvar x = "X"  # is mutating params allowed?  I guess why not.
  }
   =====


(command.Proc
  keyword: <Id.KW_Proc proc>
  name: <p>
  sig: (proc_sig.Closed untyped:[(UntypedParam name:<Id.Expr_Name x>)] typed:[])
  body: 
    (BraceGroup
      left: <Id.KW_Proc proc>
      children: [
        (command.PlaceMutation
          keyword: <Id.KW_SetVar setvar>
          lhs: [(place_expr.Var name:<Id.Expr_Name x>)]
          op: <Id.Arith_Equal _>
          rhs: (DQ <X>)
        )
      ]
      redirects: []
      right: <Id.Lit_RBrace '}'>
    )
)

===== CASE: 
  case $foo {
    # unbalanced is OK
    *.py) echo "python" ;;
  }
   =====


(command.Case
  to_match: {($ Id.VSub_DollarName foo)}
  arms: [
    (CaseArm
      pat_list: [{<Id.Lit_Star '*'> <.py>}]
      action: [(command.Simple words:[{<echo>} {(DQ <python>)}] redirects:[] more_env:[] do_fork:T)]
      spids: [13 15 23 -1]
    )
  ]
  redirects: []
)

===== CASE: 
  case $foo {
    (*.py) echo "python" ;;
  }
   =====


(command.Case
  to_match: {($ Id.VSub_DollarName foo)}
  arms: [
    (CaseArm
      pat_list: [{<Id.Lit_Star '*'> <.py>}]
      action: [(command.Simple words:[{<echo>} {(DQ <python>)}] redirects:[] more_env:[] do_fork:T)]
      spids: [9 12 20 -1]
    )
  ]
  redirects: []
)

===== CASE: 
  case "foo" {
    (*.py) echo "python" ;;
  }
   =====


(command.Case
  to_match: {(DQ <foo>)}
  arms: [
    (CaseArm
      pat_list: [{<Id.Lit_Star '*'> <.py>}]
      action: [(command.Simple words:[{<echo>} {(DQ <python>)}] redirects:[] more_env:[] do_fork:T)]
      spids: [11 14 22 -1]
    )
  ]
  redirects: []
)

===== CASE: 
  case foo {
    (*.py) echo "python" ;;
  }
   =====


    case foo {
         ^~~
[ -c flag ]:2: This is a constant string.  You may want a variable like $x (parse_bare_word)

===== CASE: 
  for x in (obj) {
    echo $x
  }
   =====


(command.ForEach
  keyword: <Id.KW_For for>
  iter_names: [x]
  iterable: (for_iter.Oil e:(expr.Var name:<Id.Expr_Name obj>) blame:<Id.Op_RParen _>)
  body: 
    (BraceGroup
      left: <Id.Lit_LBrace '{'>
      children: [
        (command.Simple
          words: [{<echo>} {($ Id.VSub_DollarName x)}]
          redirects: []
          more_env: []
          do_fork: T
        )
      ]
      redirects: []
      right: <Id.Lit_RBrace '}'>
    )
  redirects: []
)

===== CASE: 
  for x in (obj); do
    echo $x
  done
   =====


    for x in (obj); do
                  ^
[ -c flag ]:2: Expected { after iterable expression

===== CASE: 
  for x, y in SPAM EGGS; do
    echo $x
  done
   =====


(command.ForEach
  keyword: <Id.KW_For for>
  iter_names: [x y]
  iterable: (for_iter.Words words:[{<SPAM>} {<EGGS>}])
  body: 
    (command.DoGroup
      left: <Id.KW_Do do>
      children: [
        (command.Simple
          words: [{<echo>} {($ Id.VSub_DollarName x)}]
          redirects: []
          more_env: []
          do_fork: T
        )
      ]
      right: <Id.KW_Done done>
    )
  redirects: []
)

===== CASE: 
  for x-y in SPAM EGGS; do
    echo $x
  done
   =====


    for x-y in SPAM EGGS; do
        ^~~
[ -c flag ]:2: Invalid loop variable name 'x-y'

===== CASE: 
  for x, y, z in SPAM EGGS; do
    echo $x
  done
   =====


    for x, y, z in SPAM EGGS; do
    ^~~
[ -c flag ]:2: Expected at most 2 loop variables

===== CASE: 
  for w, x, y, z in SPAM EGGS; do
    echo $x
  done
   =====


    for w, x, y, z in SPAM EGGS; do
                 ^
[ -c flag ]:2: Unexpected word after 3 loop variables

===== CASE: 
  for x, y in SPAM EGGS
  do
    echo $x
  done
   =====


(command.ForEach
  keyword: <Id.KW_For for>
  iter_names: [x y]
  iterable: (for_iter.Words words:[{<SPAM>} {<EGGS>}])
  body: 
    (command.DoGroup
      left: <Id.KW_Do do>
      children: [
        (command.Simple
          words: [{<echo>} {($ Id.VSub_DollarName x)}]
          redirects: []
          more_env: []
          do_fork: T
        )
      ]
      right: <Id.KW_Done done>
    )
  redirects: []
)

===== CASE: for const in (x) { echo $var } =====


(command.ForEach
  keyword: <Id.KW_For for>
  iter_names: [const]
  iterable: (for_iter.Oil e:(expr.Var name:<Id.Expr_Name x>) blame:<Id.Op_RParen _>)
  body: 
    (BraceGroup
      left: <Id.Lit_LBrace '{'>
      children: [
        (command.Simple
          words: [{<echo>} {($ Id.VSub_DollarName var)}]
          redirects: []
          more_env: []
          do_fork: T
        )
      ]
      redirects: []
      right: <Id.Lit_RBrace '}'>
    )
  redirects: []
)

===== CASE: 
  for x in bare {
    echo $x
  }
   =====


    for x in bare {
             ^~~~
[ -c flag ]:2: Surround this word with either parens or quotes (parse_bare_word)

===== CASE: 
  for x in a b {
    echo $x
  }
   =====


(command.ForEach
  keyword: <Id.KW_For for>
  iter_names: [x]
  iterable: (for_iter.Words words:[{<a>} {<b>}])
  body: 
    (BraceGroup
      left: <Id.Lit_LBrace '{'>
      children: [
        (command.Simple
          words: [{<echo>} {($ Id.VSub_DollarName x)}]
          redirects: []
          more_env: []
          do_fork: T
        )
      ]
      redirects: []
      right: <Id.Lit_RBrace '}'>
    )
  redirects: []
)

===== CASE: 
  for x in *.py {
    echo $x
  }
   =====


(command.ForEach
  keyword: <Id.KW_For for>
  iter_names: [x]
  iterable: (for_iter.Words words:[{<Id.Lit_Star '*'> <.py>}])
  body: 
    (BraceGroup
      left: <Id.Lit_LBrace '{'>
      children: [
        (command.Simple
          words: [{<echo>} {($ Id.VSub_DollarName x)}]
          redirects: []
          more_env: []
          do_fork: T
        )
      ]
      redirects: []
      right: <Id.Lit_RBrace '}'>
    )
  redirects: []
)

===== CASE: 
  for x in "quoted" {
    echo $x
  }
   =====


(command.ForEach
  keyword: <Id.KW_For for>
  iter_names: [x]
  iterable: (for_iter.Words words:[{(DQ <quoted>)}])
  body: 
    (BraceGroup
      left: <Id.Lit_LBrace '{'>
      children: [
        (command.Simple
          words: [{<echo>} {($ Id.VSub_DollarName x)}]
          redirects: []
          more_env: []
          do_fork: T
        )
      ]
      redirects: []
      right: <Id.Lit_RBrace '}'>
    )
  redirects: []
)

===== CASE: 
  var snippets = [{status: 42}]
  for snippet in (snippets) {
    if (snippet["status"] === 0) {
      echo hi
    }

    # The $ causes a wierd error
    if ($snippet["status"] === 0) {
      echo hi
    }
  }
   =====


      if ($snippet["status"] === 0) {
          ^~~~~~~~
[ -c flag ]:9: In expressions, remove $ and use `snippet`, or sometimes "$snippet"

===== CASE: 
  var content = [ 1, 2, 4 ]
  var count = 0

  # The $ causes a weird error
  while (count < $len(content)) {
    setvar count += 1
  }
   =====


    while (count < $len(content)) {
                   ^~~~
[ -c flag ]:6: In expressions, remove $ and use `len`, or sometimes "$len"

===== CASE: for x in & =====


  for x in &
           ^
[ -c flag ]:1: Invalid word in for loop

===== CASE: for (( i=0; i<10; i++ )) ls =====


  for (( i=0; i<10; i++ )) ls
                           ^~
[ -c flag ]:1: Invalid word after for expression

===== CASE: for ( i=0; i<10; i++ ) =====


  for ( i=0; i<10; i++ )
      ^
[ -c flag ]:1: Expected loop variable (a constant word)

===== CASE: for $x in 1 2 3; do echo $i; done =====


  for $x in 1 2 3; do echo $i; done
      ^~
[ -c flag ]:1: Expected loop variable (a constant word)

===== CASE: for x.y in 1 2 3; do echo $i; done =====


  for x.y in 1 2 3; do echo $i; done
      ^~~
[ -c flag ]:1: Invalid loop variable name 'x.y'

===== CASE: for x in 1 2 3; & =====


  for x in 1 2 3; &
                  ^
[ -c flag ]:1: Expected word type Id.KW_Do, got Id.Op_Amp

===== CASE: for foo BAD =====


  for foo BAD
             ^
[ -c flag ]:1: Expected loop variable (a constant word)

===== CASE: for var in x; do echo $var; done =====


(command.ForEach
  keyword: <Id.KW_For for>
  iter_names: [var]
  iterable: (for_iter.Words words:[{<x>}])
  body: 
    (command.DoGroup
      left: <Id.KW_Do do>
      children: [
        (command.Sentence
          child: 
            (command.Simple
              words: [{<echo>} {($ Id.VSub_DollarName var)}]
              redirects: []
              more_env: []
              do_fork: T
            )
          terminator: <Id.Op_Semi _>
        )
      ]
      right: <Id.KW_Done done>
    )
  redirects: []
)

===== CASE: echo @ =====


  echo @
       ^
[ -c flag ]:1: Literal @ starting a word must be quoted (parse_at_all)

===== CASE: echo @@ =====


  echo @@
       ^
[ -c flag ]:1: Literal @ starting a word must be quoted (parse_at_all)

===== CASE: echo @{foo} =====


  echo @{foo}
       ^
[ -c flag ]:1: Literal @ starting a word must be quoted (parse_at_all)

===== CASE: echo @/foo/ =====


  echo @/foo/
       ^
[ -c flag ]:1: Literal @ starting a word must be quoted (parse_at_all)

===== CASE: echo @"foo" =====


  echo @"foo"
       ^
[ -c flag ]:1: Literal @ starting a word must be quoted (parse_at_all)

===== CASE: write -- $f(x) =====


(command.Simple
  words: [
    {<write>}
    {<-->}
    {
      (word_part.FuncCall
        name: <Id.VSub_DollarName '$f'>
        args: 
          (ArgList
            left: <Id.VSub_DollarName '$f'>
            positional: [(expr.Var name:<Id.Expr_Name x>)]
            named: []
            right: <Id.Op_RParen _>
          )
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: write -- $f(x) =====


(command.Simple
  words: [
    {<write>}
    {<-->}
    {
      (word_part.FuncCall
        name: <Id.VSub_DollarName '$f'>
        args: 
          (ArgList
            left: <Id.VSub_DollarName '$f'>
            positional: [(expr.Var name:<Id.Expr_Name x>)]
            named: []
            right: <Id.Op_RParen _>
          )
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: write -- @sorted(x) =====


  write -- @sorted(x)
                  ^
[ -c flag ]:1: Unexpected left paren (might need a space before it)

===== CASE: write -- @sorted(x) =====


(command.Simple
  words: [
    {<write>}
    {<-->}
    {
      (word_part.FuncCall
        name: <Id.Lit_Splice '@sorted'>
        args: 
          (ArgList
            left: <Id.Lit_Splice '@sorted'>
            positional: [(expr.Var name:<Id.Expr_Name x>)]
            named: []
            right: <Id.Op_RParen _>
          )
      )
    }
  ]
  redirects: []
  more_env: []
  do_fork: T
)

===== CASE: 
f() {
  write -- @sorted(x)
}
 =====


    write -- @sorted(x)
                    ^
[ -c flag ]:3: Unexpected left paren (might need a space before it)

===== CASE: 
f() {
  write -- @sorted(x)
}
 =====


(command.ShFunction
  name: f
  body: 
    (BraceGroup
      left: <Id.Lit_LBrace '{'>
      children: [
        (command.Simple
          words: [
            {<write>}
            {<-->}
            {
              (word_part.FuncCall
                name: <Id.Lit_Splice '@sorted'>
                args: 
                  (ArgList
                    left: <Id.Lit_Splice '@sorted'>
                    positional: [(expr.Var name:<Id.Expr_Name x>)]
                    named: []
                    right: <Id.Op_RParen _>
                  )
              )
            }
          ]
          redirects: []
          more_env: []
          do_fork: T
        )
      ]
      redirects: []
      right: <Id.Lit_RBrace '}'>
    )
)

===== CASE: 
f() {
  write -- @sorted (( z ))
}
 =====


    write -- @sorted (( z ))
                     ^~
[ -c flag ]:3: Invalid word while parsing command list

===== CASE: 
  code="printf % x"
  eval $code
   =====


  %
   ^
[ printf word at line 1 of [ eval word at line 3 of [ -c flag ] ] ]:1: Expected a printf format character

===== CASE: 
  x="echo )"
  eval $x
   =====


  echo )
       ^
[ eval word at line 3 of [ -c flag ] ]:1: Invalid word while parsing command line

----------------------


===== CASE: test/parse-errors/01-bad-func.sh =====

  foo (,)
       ^
'test/parse-errors/01-bad-func.sh':15: Syntax error in expression (near Id.Arith_Comma)

===== CASE: test/parse-errors/02-bad-func.sh =====

  foo()
         ^
'test/parse-errors/02-bad-func.sh':3: Unexpected word while parsing compound command

===== CASE: test/parse-errors/05-unterminated-single.sh =====

A
B
  echo 'C
       ^
'test/parse-errors/05-unterminated-single.sh':5: Unexpected EOF in single-quoted string that began here

===== CASE: test/parse-errors/06-unterminated-double-long.sh =====

A
B
  echo 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 "
                                                                                               ^
'test/parse-errors/06-unterminated-double-long.sh':9: Unexpected EOF reading double-quoted string that began here

===== CASE: test/parse-errors/06-unterminated-double.sh =====

A
B
  echo "0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789
       ^
'test/parse-errors/06-unterminated-double.sh':6: Unexpected EOF reading double-quoted string that began here

===== CASE: test/parse-errors/07-unterminated-here-doc-2.sh =====

  cat << "$@"
         ^
'test/parse-errors/07-unterminated-here-doc-2.sh':2: Invalid here doc delimiter

===== CASE: test/parse-errors/07-unterminated-here-doc.sh =====

  cat <<EOF
      ^~
'test/parse-errors/07-unterminated-here-doc.sh':5: Couldn't find terminator for here doc that starts here