Class: Duby::AST::Raise

Inherits:
Node show all
Includes:
Valued
Defined in:
lib/duby/ast/flow.rb,
lib/duby/compiler.rb,
lib/duby/jvm/source_generator/precompile.rb

Instance Attribute Summary

Attributes included from Valued

#value

Attributes included from Typed

#type

Attributes inherited from Node

#children, #inferred_type, #newline, #parent, #position

Instance Method Summary collapse

Methods inherited from Node

#[], #each, #inspect, #line_number, #log, #precompile, #resolve_if, #resolved!, #resolved?, #simple_name, #temp, #to_s

Constructor Details

#initialize(parent, line_number, &block) ⇒ Raise

Returns a new instance of Raise.



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# File 'lib/duby/ast/flow.rb', line 206

def initialize(parent, line_number, &block)
  super(parent, line_number, &block)
end

Instance Method Details

#compile(compiler, expression) ⇒ Object 



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# File 'lib/duby/compiler.rb', line 241

def compile(compiler, expression)
  compiler.line(line_number)
  compiler._raise(@exception)
end

#expr?(compiler) ⇒ Boolean

Returns:



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# File 'lib/duby/jvm/source_generator/precompile.rb', line 126

def expr?(compiler)
  false
end

#infer(typer) ⇒ Object 



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# File 'lib/duby/ast/flow.rb', line 210

def infer(typer)
  unless resolved?
    @inferred_type = AST.unreachable_type
    throwable = AST.type('java.lang.Throwable')
    if children.size == 1
      arg_type = typer.infer(children[0])
      unless arg_type
        typer.defer(self)
        return
      end
      if throwable.assignable_from?(arg_type) && !arg_type.meta?
        @exception = children[0]
        resolved!
        return @inferred_type
      end
    end

    arg_types = children.map {|c| typer.infer(c)}
    if arg_types.any? {|c| c.nil?}
      typer.defer(self)
    else
      if arg_types[0] && throwable.assignable_from?(arg_types[0])
        klass = children.shift
      else
        klass = Constant.new(self, position, 'RuntimeException')
      end
      @exception = Call.new(self, position, 'new') do
        [klass, children, nil]
      end
      resolved!
      @children = [@exception]
      typer.infer(@exception)
    end
  end
  @inferred_type
end