================================================================================
Query from select
================================================================================

var x = from a in source select a.B;

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (select_clause
                (member_access_expression
                  expression: (identifier)
                  name: (identifier))))))))))

================================================================================
Query from select with operator
================================================================================

var x = from a in source select a * 2;

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (select_clause
                (binary_expression
                  left: (identifier)
                  right: (integer_literal))))))))))

================================================================================
Query from select with method call
================================================================================

var x = from a in source select a.B();

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (select_clause
                (invocation_expression
                  function: (member_access_expression
                    expression: (identifier)
                    name: (identifier))
                  arguments: (argument_list))))))))))

================================================================================
Query from select with conditional operator
================================================================================

var x = from a in source select a ? 0 : 1;

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (select_clause
                (conditional_expression
                  condition: (identifier)
                  consequence: (integer_literal)
                  alternative: (integer_literal))))))))))

================================================================================
Query from select with assignment
================================================================================

var x = from a in source select somevar = a;

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (select_clause
                (assignment_expression
                  left: (identifier)
                  (assignment_operator)
                  right: (identifier))))))))))

================================================================================
Query from select projection
================================================================================

var x = from a in source select new { Name = a.B };

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (select_clause
                (anonymous_object_creation_expression
                  (name_equals
                    (identifier))
                  (member_access_expression
                    expression: (identifier)
                    name: (identifier)))))))))))

================================================================================
Query from select with where
================================================================================

var x = from a in source
  where a.B == "A"
  select a;

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (where_clause
                (binary_expression
                  left: (member_access_expression
                    expression: (identifier)
                    name: (identifier))
                  right: (string_literal
                    (string_literal_fragment))))
              (select_clause
                (identifier)))))))))

================================================================================
Query from select with where and projection
================================================================================

var x = from a in source
  where a.B == "A" && a.C == "D"
  select new { Name = a.B };

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (where_clause
                (binary_expression
                  left: (binary_expression
                    left: (member_access_expression
                      expression: (identifier)
                      name: (identifier))
                    right: (string_literal
                      (string_literal_fragment)))
                  right: (binary_expression
                    left: (member_access_expression
                      expression: (identifier)
                      name: (identifier))
                    right: (string_literal
                      (string_literal_fragment)))))
              (select_clause
                (anonymous_object_creation_expression
                  (name_equals
                    (identifier))
                  (member_access_expression
                    expression: (identifier)
                    name: (identifier)))))))))))

================================================================================
Query from select with orderby
================================================================================

var x = from a in source
  orderby a.A descending
  orderby a.C ascending
  orderby 1
  select a;

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (order_by_clause
                (member_access_expression
                  expression: (identifier)
                  name: (identifier)))
              (order_by_clause
                (member_access_expression
                  expression: (identifier)
                  name: (identifier)))
              (order_by_clause
                (integer_literal))
              (select_clause
                (identifier)))))))))

================================================================================
Query from select with let
================================================================================

var x = from a in source
  let z = new { a.A, a.B }
  select z;

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (let_clause
                (identifier)
                (anonymous_object_creation_expression
                  (member_access_expression
                    expression: (identifier)
                    name: (identifier))
                  (member_access_expression
                    expression: (identifier)
                    name: (identifier))))
              (select_clause
                (identifier)))))))))

================================================================================
Query from select with join
================================================================================

var x = from a in sourceA
  join b in sourceB on a.FK equals b.PK
  select new { A.A, B.B };

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (join_clause
                name: (identifier)
                (identifier)
                (member_access_expression
                  expression: (identifier)
                  name: (identifier))
                (member_access_expression
                  expression: (identifier)
                  name: (identifier)))
              (select_clause
                (anonymous_object_creation_expression
                  (member_access_expression
                    expression: (identifier)
                    name: (identifier))
                  (member_access_expression
                    expression: (identifier)
                    name: (identifier)))))))))))

================================================================================
Query from select with multiple from
================================================================================

var x = from a in sourceA
  from b in sourceB
  where a.FK == b.FK
  select new { A.A, B.B };

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (from_clause
                name: (identifier)
                (identifier))
              (where_clause
                (binary_expression
                  left: (member_access_expression
                    expression: (identifier)
                    name: (identifier))
                  right: (member_access_expression
                    expression: (identifier)
                    name: (identifier))))
              (select_clause
                (anonymous_object_creation_expression
                  (member_access_expression
                    expression: (identifier)
                    name: (identifier))
                  (member_access_expression
                    expression: (identifier)
                    name: (identifier)))))))))))

================================================================================
Query from select with group by & continuation
================================================================================

var x = from a in sourceA
  group a by a.Country into g
  select new { Country = g.Key, Population = g.Sum(p => p.Population) };

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

(compilation_unit
  (global_statement
    (local_declaration_statement
      (variable_declaration
        type: (implicit_type)
        (variable_declarator
          name: (identifier)
          (equals_value_clause
            (query_expression
              (from_clause
                name: (identifier)
                (identifier))
              (group_clause
                (identifier)
                (member_access_expression
                  expression: (identifier)
                  name: (identifier)))
              (query_continuation
                name: (identifier)
                (select_clause
                  (anonymous_object_creation_expression
                    (name_equals
                      (identifier))
                    (member_access_expression
                      expression: (identifier)
                      name: (identifier))
                    (name_equals
                      (identifier))
                    (invocation_expression
                      function: (member_access_expression
                        expression: (identifier)
                        name: (identifier))
                      arguments: (argument_list
                        (argument
                          (lambda_expression
                            parameters: (implicit_parameter_list
                              (parameter
                                name: (identifier)))
                            body: (member_access_expression
                              expression: (identifier)
                              name: (identifier))))))))))))))))