Class: Liquor::Tag
Instance Attribute Summary collapse
-
#continuations ⇒ Object
readonly
Returns the value of attribute continuations.
-
#name ⇒ Object
readonly
Returns the value of attribute name.
Instance Method Summary collapse
- #check_arg_type(node, type) ⇒ Object
- #check_args(node, arg_type, kwarg_types = {}) ⇒ Object
- #compile(emit, node) ⇒ Object
-
#initialize(name, options = {}, &block) ⇒ Tag
constructor
A new instance of Tag.
Constructor Details
#initialize(name, options = {}, &block) ⇒ Tag
Returns a new instance of Tag
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# File 'lib/liquor/tag.rb', line 8 def initialize(name, ={}, &block) @name = name.to_s @body = block = .dup @continuations = (.delete(:continuations) || []).map(&:to_s) if @body.nil? raise "Cannot define a tag without body" elsif .any? raise "Unknown tag options: #{.keys.join ", "}" end end |
Instance Attribute Details
#continuations ⇒ Object (readonly)
Returns the value of attribute continuations
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# File 'lib/liquor/tag.rb', line 6 def continuations @continuations end |
#name ⇒ Object (readonly)
Returns the value of attribute name
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# File 'lib/liquor/tag.rb', line 5 def name @name end |
Instance Method Details
#check_arg_type(node, type) ⇒ Object
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# File 'lib/liquor/tag.rb', line 57 def check_arg_type(node, type) expected = nil case ntype(node) when :kwarg actual = ntype(kwvalue(node)) when :blockarg actual = :block else actual = ntype(node) end type = type.compact.first if type.is_a?(Array) case type when :ident, :string expected = type failed = (actual != expected) when :expr expected = :expression failed = (actual == :block) when :block expected = :block failed = (actual != expected) else raise "Unknown node type #{type}" end if failed actual = Parser::TOKEN_NAME_MAP[actual] || actual expected = Parser::TOKEN_NAME_MAP[expected] || expected raise SyntaxError.new("unexpected `#{actual}', expecting `#{expected}'", nloc(node)) end end |
#check_args(node, arg_type, kwarg_types = {}) ⇒ Object
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# File 'lib/liquor/tag.rb', line 26 def check_args(node, arg_type, kwarg_types={}) name, arg, *kwargs = nvalue(node) if arg_type.nil? && !arg.nil? raise SyntaxError.new("extraneous argument", nloc(arg)) elsif arg.nil? if !arg_type.nil? && !(arg_type.is_a?(Array) && arg_type.include?(nil)) raise SyntaxError.new("missing unnamed argument", nloc(node)) end end if !arg_type.nil? && !arg.nil? check_arg_type arg, arg_type end kwarg_hash = {} kwarg_types.zip(kwargs).each do |(name, type), kwarg| if kwarg.nil? raise SyntaxError.new("unexpected `%}', expecting `#{name}:'", nloc(node)) elsif kwname(kwarg) != name.to_s raise SyntaxError.new("unexpected `#{kwname(kwarg)}:', expecting `#{name}:'", nloc(kwarg)) end check_arg_type(kwarg, type) kwarg_hash[name] = kwvalue(kwarg) end [ arg, kwarg_hash ] end |
#compile(emit, node) ⇒ Object
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# File 'lib/liquor/tag.rb', line 22 def compile(emit, node) instance_exec emit, emit.context, node, &@body end |