Class: BELParser::Language::Semantics::DeeplyNestedStatement

Inherits:
Object
  • Object
show all
Includes:
SemanticsFunction
Defined in:
lib/bel_parser/language/semantics/deeply_nested_statement.rb

Overview

DeeplyNestedStatement implements a SemanticsFunction that maps a Parsers::AST::NestedStatement to SemanticsWarning if the number of nested statements exceeds NESTING_THRESHOLD.

See Also:

Constant Summary collapse

NESTING_THRESHOLD =

Represents how many nested statments must be exceeded before a SemanticsWarning results.

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Class Method Summary collapse

Class Method Details

.count_nested_statements(node) ⇒ Object 



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# File 'lib/bel_parser/language/semantics/deeply_nested_statement.rb', line 32

def self.count_nested_statements(node)
  node
    .traverse
    .select { |n| n.is_a?(BELParser::Parsers::AST::Object) }
    .reduce(0) do |sum, object|
      sum += 1 if object.statement?
      sum
    end
end

.map(node, spec, _namespaces, will_match_partial = false) ⇒ Object 



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# File 'lib/bel_parser/language/semantics/deeply_nested_statement.rb', line 21

def self.map(node, spec, _namespaces, will_match_partial = false)
  return nil unless node.is_a?(BELParser::Parsers::AST::NestedStatement)

  nested_number = count_nested_statements(node)
  DeeplyNestedStatementWarning.new(
    node,
    spec,
    NESTING_THRESHOLD,
    nested_number) if nested_number > NESTING_THRESHOLD
end