Class: Dhall::TypeChecker::OperatorRecursiveRecordMerge

Inherits:
Object
  • Object
show all
Defined in:
lib/dhall/typecheck.rb

Instance Method Summary collapse

Constructor Details

#initialize(expr) ⇒ OperatorRecursiveRecordMerge

Returns a new instance of OperatorRecursiveRecordMerge.



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# File 'lib/dhall/typecheck.rb', line 302

def initialize(expr)
  @expr = expr
  @lhs = TypeChecker.for(expr.lhs)
  @rhs = TypeChecker.for(expr.rhs)
end

Instance Method Details

#annotate(context) ⇒ Object 



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# File 'lib/dhall/typecheck.rb', line 308

def annotate(context)
  annotated_lhs = @lhs.annotate(context)
  annotated_rhs = @rhs.annotate(context)

  type = annotated_lhs.type.deep_merge_type(annotated_rhs.type)

  TypeChecker.assert type, Dhall::RecordType,
                     "RecursiveRecordMerge got #{type}"

  # Annotate to sanity check
  TypeChecker.for(type).annotate(context)

  Dhall::TypeAnnotation.new(
    value: @expr.with(lhs: annotated_lhs, rhs: annotated_rhs),
    type:  type
  )
end