JetFile: When_ERR.jet
  NAMESPACE
    FUN
      PsiElement(fun)('fun')
      PsiWhiteSpace(' ')
      PsiElement(IDENTIFIER)('foo')
      VALUE_PARAMETER_LIST
        PsiElement(LPAR)('(')
        PsiElement(RPAR)(')')
      PsiWhiteSpace(' ')
      BLOCK
        PsiElement(LBRACE)('{')
        PsiWhiteSpace('\n  ')
        WHEN
          PsiElement(when)('when')
          PsiWhiteSpace(' ')
          PsiElement(LPAR)('(')
          REFERENCE_EXPRESSION
            PsiElement(IDENTIFIER)('e')
          PsiElement(RPAR)(')')
          PsiWhiteSpace(' ')
          PsiElement(LBRACE)('{')
          PsiWhiteSpace('\n  ')
          PsiElement(RBRACE)('}')
        PsiWhiteSpace('\n  ')
        WHEN
          PsiElement(when)('when')
          PsiWhiteSpace(' ')
          PsiElement(LPAR)('(')
          REFERENCE_EXPRESSION
            PsiElement(IDENTIFIER)('e')
          PsiElement(RPAR)(')')
          PsiWhiteSpace(' ')
          PsiElement(LBRACE)('{')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IS_PATTERN
              PsiElement(is)('is')
              PsiErrorElement:Expecting a type or a decomposer pattern
                <empty list>
            PsiWhiteSpace('  ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiWhiteSpace(' ')
            REFERENCE_EXPRESSION
              PsiElement(IDENTIFIER)('foo')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IS_PATTERN
              PsiElement(NOT_IS)('!is')
              PsiErrorElement:Expecting a type or a decomposer pattern
                <empty list>
            PsiWhiteSpace('  ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiWhiteSpace(' ')
            REFERENCE_EXPRESSION
              PsiElement(IDENTIFIER)('foo')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IN_RANGE
              OPERATION_REFERENCE
                PsiElement(in)('in')
              PsiErrorElement:Expecting an element
                <empty list>
            PsiWhiteSpace('  ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiWhiteSpace(' ')
            REFERENCE_EXPRESSION
              PsiElement(IDENTIFIER)('foo')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IN_RANGE
              OPERATION_REFERENCE
                PsiElement(NOT_IN)('!in')
              PsiErrorElement:Expecting an element
                <empty list>
            PsiWhiteSpace('  ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiWhiteSpace(' ')
            REFERENCE_EXPRESSION
              PsiElement(IDENTIFIER)('foo')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IS_PATTERN
              EXPRESSION_PATTERN
                PsiErrorElement:Expecting an element, is-condition or in-condition
                  <empty list>
            PsiElement(DOUBLE_ARROW)('=>')
            PsiWhiteSpace(' ')
            REFERENCE_EXPRESSION
              PsiElement(IDENTIFIER)('foo')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            PsiElement(else)('else')
            PsiErrorElement:Expecting '=>'
              <empty list>
          PsiWhiteSpace('\n  ')
          PsiElement(RBRACE)('}')
        PsiWhiteSpace('\n  ')
        WHEN
          PsiElement(when)('when')
          PsiWhiteSpace(' ')
          PsiElement(LPAR)('(')
          REFERENCE_EXPRESSION
            PsiElement(IDENTIFIER)('e')
          PsiElement(RPAR)(')')
          PsiWhiteSpace(' ')
          PsiElement(LBRACE)('{')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IS_PATTERN
              PsiElement(is)('is')
              PsiErrorElement:Expecting a type or a decomposer pattern
                <empty list>
            PsiWhiteSpace('  ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiErrorElement:Expecting an element
              <empty list>
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IS_PATTERN
              PsiElement(NOT_IS)('!is')
              PsiErrorElement:Expecting a type or a decomposer pattern
                <empty list>
            PsiWhiteSpace('  ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiErrorElement:Expecting an element
              <empty list>
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IN_RANGE
              OPERATION_REFERENCE
                PsiElement(in)('in')
              PsiErrorElement:Expecting an element
                <empty list>
            PsiWhiteSpace('  ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiErrorElement:Expecting an element
              <empty list>
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IN_RANGE
              OPERATION_REFERENCE
                PsiElement(NOT_IN)('!in')
              PsiErrorElement:Expecting an element
                <empty list>
            PsiWhiteSpace('  ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiErrorElement:Expecting an element
              <empty list>
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IN_RANGE
              OPERATION_REFERENCE
                PsiElement(NOT_IN)('!in')
              PsiErrorElement:Expecting an element
                <empty list>
            PsiWhiteSpace('  ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiErrorElement:Expecting an expression
              <empty list>
          PsiWhiteSpace(' ')
          PsiElement(SEMICOLON)(';')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IS_PATTERN
              EXPRESSION_PATTERN
                PsiErrorElement:Expecting an element, is-condition or in-condition
                  <empty list>
            PsiElement(DOUBLE_ARROW)('=>')
            PsiErrorElement:Expecting an element
              <empty list>
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            PsiElement(else)('else')
            PsiErrorElement:Expecting '=>'
              <empty list>
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            PsiElement(else)('else')
            PsiWhiteSpace(' ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiErrorElement:Expecting an element
              <empty list>
          PsiWhiteSpace('\n  ')
          PsiElement(RBRACE)('}')
        PsiWhiteSpace('\n  ')
        WHEN
          PsiElement(when)('when')
          PsiWhiteSpace(' ')
          PsiElement(LPAR)('(')
          REFERENCE_EXPRESSION
            PsiElement(IDENTIFIER)('e')
          PsiElement(RPAR)(')')
          PsiWhiteSpace(' ')
          PsiElement(LBRACE)('{')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IS_PATTERN
              PsiElement(is)('is')
              PsiWhiteSpace(' ')
              PsiErrorElement:Pattern expected
                PsiElement(MINUS)('-')
            PsiWhiteSpace(' ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiWhiteSpace(' ')
            REFERENCE_EXPRESSION
              PsiElement(IDENTIFIER)('foo')
          PsiWhiteSpace('\n    ')
          WHEN_ENTRY
            WHEN_CONDITION_IS_PATTERN
              PsiElement(is)('is')
              PsiWhiteSpace(' ')
              TUPLE_PATTERN
                PsiElement(LPAR)('(')
                PsiErrorElement:Expecting a pattern
                  PsiElement(COMMA)(',')
                PsiWhiteSpace(' ')
                PsiErrorElement:Expecting a pattern
                  PsiElement(COMMA)(',')
                PsiWhiteSpace(' ')
                TUPLE_PATTERN_ENTRY
                  EXPRESSION_PATTERN
                    INTEGER_CONSTANT
                      PsiElement(INTEGER_LITERAL)('1')
                PsiElement(COMMA)(',')
                PsiWhiteSpace(' ')
                PsiErrorElement:Expecting a pattern
                  PsiElement(COMMA)(',')
                PsiErrorElement:Expecting a pattern
                  <empty list>
                PsiWhiteSpace(' ')
                PsiElement(RPAR)(')')
            PsiWhiteSpace(' ')
            PsiElement(DOUBLE_ARROW)('=>')
            PsiWhiteSpace(' ')
            REFERENCE_EXPRESSION
              PsiElement(IDENTIFIER)('foo')
          PsiWhiteSpace('\n  ')
          PsiElement(RBRACE)('}')
        PsiWhiteSpace('\n')
        PsiElement(RBRACE)('}')