Class: Opal::Nodes::RegexpNode
- Defined in:
- opal/lib/opal/nodes/literal.rb
Constant Summary collapse
- SUPPORTED_FLAGS =
/[gimuy]/.freeze
Instance Attribute Summary collapse
-
#flags ⇒ Object
Returns the value of attribute flags.
-
#value ⇒ Object
Returns the value of attribute value.
Attributes inherited from Base
Instance Method Summary collapse
- #compile ⇒ Object
- #compile_dynamic_regexp ⇒ Object
- #compile_static_regexp ⇒ Object
- #extract_flags_and_value ⇒ Object
-
#initialize ⇒ RegexpNode
constructor
A new instance of RegexpNode.
- #raw_value ⇒ Object
Methods inherited from Base
#add_gvar, #add_ivar, #add_local, #add_temp, #children, children, #class_variable_owner, #class_variable_owner_nesting_level, #comments, #compile_to_fragments, #error, #expr, #expr?, #expr_or_nil, #fragment, handle, handlers, #has_rescue_else?, #helper, #in_ensure, #in_ensure?, #in_while?, #process, #push, #recv, #recv?, #s, #scope, #stmt, #stmt?, truthy_optimize?, #unshift, #while_loop, #with_temp, #wrap
Methods included from Helpers
#conditional_send, #current_indent, #empty_line, #indent, #js_falsy, #js_truthy, #js_truthy_optimize, #line, #mid_to_jsid, #property, #valid_name?
Constructor Details
#initialize ⇒ RegexpNode
Returns a new instance of RegexpNode.
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# File 'opal/lib/opal/nodes/literal.rb', line 112 def initialize(*) super extract_flags_and_value end |
Instance Attribute Details
#flags ⇒ Object
Returns the value of attribute flags.
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# File 'opal/lib/opal/nodes/literal.rb', line 107 def flags @flags end |
#value ⇒ Object
Returns the value of attribute value.
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# File 'opal/lib/opal/nodes/literal.rb', line 107 def value @value end |
Instance Method Details
#compile ⇒ Object
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# File 'opal/lib/opal/nodes/literal.rb', line 117 def compile flags.select! do |flag| if SUPPORTED_FLAGS =~ flag true else compiler.warning "Skipping the '#{flag}' Regexp flag as it's not widely supported by JavaScript vendors." false end end if value.type == :str compile_static_regexp else compile_dynamic_regexp end end |
#compile_dynamic_regexp ⇒ Object
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# File 'opal/lib/opal/nodes/literal.rb', line 134 def compile_dynamic_regexp push 'Opal.regexp([' value.children.each_with_index do |v, index| push ', ' unless index.zero? push expr(v) end push ']' push ", '#{flags.join}'" if flags.any? push ")" end |
#compile_static_regexp ⇒ Object
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# File 'opal/lib/opal/nodes/literal.rb', line 145 def compile_static_regexp value = self.value.children[0] case value when '' push('/(?:)/') when %r{\?<\w+\>} = "named captures are not supported in javascript: #{value.inspect}" push "self.$raise(new SyntaxError('#{}'))" else push "#{Regexp.new(value).inspect}#{flags.join}" end end |
#extract_flags_and_value ⇒ Object
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# File 'opal/lib/opal/nodes/literal.rb', line 158 def extract_flags_and_value *values, flags_sexp = *children self.flags = flags_sexp.children.map(&:to_s) self.value = case values.length when 0 # empty regexp, we can process it inline s(:str, '') when 1 # simple plain regexp, we can put it inline values[0] else s(:dstr, *values) end # trimming when //x provided # required by parser gem, but JS doesn't support 'x' flag if flags.include?('x') parts = value.children.map do |part| if part.is_a?(::Opal::AST::Node) && part.type == :str trimmed_value = part.children[0].gsub(/\A\s*\#.*/, '').gsub(/\s/, '') s(:str, trimmed_value) else part end end self.value = value.updated(nil, parts) flags.delete('x') end if value.type == :str # Replacing \A -> ^, \z -> $, required for the parser gem self.value = s(:str, value.children[0].gsub('\A', '^').gsub('\z', '$')) end end |
#raw_value ⇒ Object
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# File 'opal/lib/opal/nodes/literal.rb', line 195 def raw_value self.value = @sexp.loc.expression.source end |