Class: Dhall::RecordProjection

Inherits:

Expression

• Object
• Expression
• Dhall::RecordProjection

Defined in:

lib/dhall/ast.rb,
lib/dhall/binary.rb,
lib/dhall/normalize.rb

Class Method Summary

• .decode(record, *selectors) ⇒ Object
• .for(record, selectors) ⇒ Object

Instance Method Summary

• #as_json ⇒ Object
• #fetch(selector) ⇒ Object
• #normalize ⇒ Object

Methods inherited from Expression

#&, #*, #+, #annotate, #as_dhall, #cache_key, #call, #concat, #deep_merge, #deep_merge_type, #dhall_eq, #digest, #fusion, #merge, #resolve, #shift, #slice, #substitute, #to_binary, #to_cbor, #to_proc, #to_s, #|

Class Method Details

.decode(record, *selectors) ⇒ Object

# File 'lib/dhall/binary.rb', line 162

def self.decode(record, *selectors)
	record = Dhall.decode(record)
	if selectors.length == 1 && selectors[0].is_a?(Array)
		RecordProjectionByExpression.new(
			record:   record,
			selector: Dhall.decode(selectors[0][0])
		)
	else
		self.for(record, selectors)
	end
end

.for(record, selectors) ⇒ Object

# File 'lib/dhall/ast.rb', line 906

def self.for(record, selectors)
	if selectors.empty?
		EmptyRecordProjection.new(record: record)
	else
		new(record: record, selectors: selectors)
	end
end

Instance Method Details

#as_json ⇒ Object

# File 'lib/dhall/ast.rb', line 918

def as_json
	[10, record.as_json, *selectors]
end

#fetch(selector) ⇒ Object

# File 'lib/dhall/ast.rb', line 914

def fetch(selector)
	record.fetch(selector)
end

#normalize ⇒ Object

# File 'lib/dhall/normalize.rb', line 348

def normalize
	record.normalize.slice(*selectors.sort)
end