Module: Expressir::Express::Formatters::ExpressionsFormatter

Included in:
Expressir::Express::Formatter
Defined in:
lib/expressir/express/formatters/expressions_formatter.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/expressir/express/formatters/expressions_formatter.rb', line 5

def self.included(base)
  base.register_formatter Model::Expressions::AggregateInitializer,
                          :format_expressions_aggregate_initializer
  base.register_formatter Model::Expressions::AggregateInitializerItem,
                          :format_expressions_aggregate_initializer_item
  base.register_formatter Model::Expressions::BinaryExpression,
                          :format_expressions_binary_expression
  base.register_formatter Model::Expressions::EntityConstructor,
                          :format_expressions_entity_constructor
  base.register_formatter Model::Expressions::FunctionCall,
                          :format_expressions_function_call
  base.register_formatter Model::Expressions::Interval,
                          :format_expressions_interval
  base.register_formatter Model::Expressions::QueryExpression,
                          :format_expressions_query_expression
  base.register_formatter Model::Expressions::UnaryExpression,
                          :format_expressions_unary_expression
end

Instance Method Details

#format_expressions_aggregate_initializer(node) ⇒ Object 



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# File 'lib/expressir/express/formatters/expressions_formatter.rb', line 24

def format_expressions_aggregate_initializer(node)
  [
    "[",
    Array(node.items).map { |x| format(x) }.join(", "),
    "]",
  ].join
end

#format_expressions_aggregate_initializer_item(node) ⇒ Object 



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# File 'lib/expressir/express/formatters/expressions_formatter.rb', line 32

def format_expressions_aggregate_initializer_item(node)
  [
    format(node.expression),
    ":",
    format(node.repetition),
  ].join
end

#format_expressions_binary_expression(node) ⇒ Object 



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# File 'lib/expressir/express/formatters/expressions_formatter.rb', line 40

def format_expressions_binary_expression(node)
  operator_precedence = self.class.const_get(:OPERATOR_PRECEDENCE)
  op1_bin_exp = node.operand1.is_a?(Model::Expressions::BinaryExpression) &&
    (operator_precedence[node.operand1.operator] >= operator_precedence[node.operator])
  op2_bin_exp = node.operand2.is_a?(Model::Expressions::BinaryExpression) &&
    (operator_precedence[node.operand2.operator] >= operator_precedence[node.operator])

  [
    *if op1_bin_exp
       "("
     end,
    format(node.operand1),
    *if op1_bin_exp
       ")"
     end,
    " ",
    case node.operator
    when Model::Expressions::BinaryExpression::ADDITION then "+"
    when Model::Expressions::BinaryExpression::AND then "AND"
    when Model::Expressions::BinaryExpression::COMBINE then "||"
    when Model::Expressions::BinaryExpression::EQUAL then "="
    when Model::Expressions::BinaryExpression::EXPONENTIATION then "**"
    when Model::Expressions::BinaryExpression::GREATER_THAN then ">"
    when Model::Expressions::BinaryExpression::GREATER_THAN_OR_EQUAL then ">="
    when Model::Expressions::BinaryExpression::IN then "IN"
    when Model::Expressions::BinaryExpression::INSTANCE_EQUAL then ":=:"
    when Model::Expressions::BinaryExpression::INSTANCE_NOT_EQUAL then ":<>:"
    when Model::Expressions::BinaryExpression::INTEGER_DIVISION then "DIV"
    when Model::Expressions::BinaryExpression::LESS_THAN then "<"
    when Model::Expressions::BinaryExpression::LESS_THAN_OR_EQUAL then "<="
    when Model::Expressions::BinaryExpression::LIKE then "LIKE"
    when Model::Expressions::BinaryExpression::MODULO then "MOD"
    when Model::Expressions::BinaryExpression::MULTIPLICATION then "*"
    when Model::Expressions::BinaryExpression::NOT_EQUAL then "<>"
    when Model::Expressions::BinaryExpression::OR then "OR"
    when Model::Expressions::BinaryExpression::REAL_DIVISION then "/"
    when Model::Expressions::BinaryExpression::SUBTRACTION then "-"
    when Model::Expressions::BinaryExpression::XOR then "XOR"
    end,
    " ",
    *if op2_bin_exp
       "("
     end,
    format(node.operand2),
    *if op2_bin_exp
       ")"
     end,
  ].join
end

#format_expressions_entity_constructor(node) ⇒ Object 



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# File 'lib/expressir/express/formatters/expressions_formatter.rb', line 90

def format_expressions_entity_constructor(node)
  [
    format(node.entity),
    "(",
    Array(node.parameters).map { |x| format(x) }.join(", "),
    ")",
  ].join
end

#format_expressions_function_call(node) ⇒ Object 



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# File 'lib/expressir/express/formatters/expressions_formatter.rb', line 99

def format_expressions_function_call(node)
  params = if node.parameters.nil?
             []
           else
             [
               "(",
               node.parameters.map { |x| format(x) }.join(", "),
               ")",
             ]
           end

  [format(node.function), params].join
end

#format_expressions_interval(node) ⇒ Object 



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# File 'lib/expressir/express/formatters/expressions_formatter.rb', line 113

def format_expressions_interval(node)
  [
    "{",
    format(node.low),
    " ",
    case node.operator1
    when Model::Expressions::Interval::LESS_THAN then "<"
    when Model::Expressions::Interval::LESS_THAN_OR_EQUAL then "<="
    end,
    " ",
    format(node.item),
    " ",
    case node.operator2
    when Model::Expressions::Interval::LESS_THAN then "<"
    when Model::Expressions::Interval::LESS_THAN_OR_EQUAL then "<="
    end,
    " ",
    format(node.high),
    "}",
  ].join
end

#format_expressions_query_expression(node) ⇒ Object 



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# File 'lib/expressir/express/formatters/expressions_formatter.rb', line 135

def format_expressions_query_expression(node)
  [
    "QUERY",
    "(",
    node.id,
    " ",
    "<*",
    " ",
    format(node.aggregate_source),
    " ",
    "|",
    " ",
    format(node.expression),
    *format_remarks(node).instance_eval do |x|
      x&.length&.positive? ? ["\n", *x, "\n"] : x
    end,
    ")",
  ].join
end

#format_expressions_unary_expression(node) ⇒ Object 



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# File 'lib/expressir/express/formatters/expressions_formatter.rb', line 155

def format_expressions_unary_expression(node)
  needs_parens = node.operand.is_a?(Model::Expressions::BinaryExpression) ||
    node.operand.is_a?(Model::Expressions::Interval)

  [
    case node.operator
    when Model::Expressions::UnaryExpression::MINUS then "-"
    when Model::Expressions::UnaryExpression::NOT then "NOT"
    when Model::Expressions::UnaryExpression::PLUS then "+"
    end,
    if node.operator == Model::Expressions::UnaryExpression::NOT
      " "
    end,
    *if needs_parens
       "("
     end,
    format(node.operand),
    *if needs_parens
       ")"
     end,
  ].join
end