Class: Mirah::AST::Loop
- Inherits:
-
Node
- Object
- Node
- Mirah::AST::Loop
show all
- Defined in:
- lib/mirah/ast/flow.rb,
lib/mirah/compiler/flow.rb,
lib/mirah/jvm/source_generator/precompile.rb
Instance Attribute Summary collapse
Attributes inherited from Node
#children, #inferred_type, #newline, #parent, #position
Instance Method Summary
collapse
Methods inherited from Node
#<<, ===, #[], #[]=, #_dump, _load, #_set_parent, child, child_name, #child_nodes, #each, #empty?, #inferred_type!, #initialize_copy, #insert, #inspect, #inspect_children, #line_number, #log, #resolve_if, #resolved!, #resolved?, #simple_name, #string_value, #temp, #top_level?, #validate_child, #validate_children
Constructor Details
#initialize(parent, position, check_first, negative, &block) ⇒ Loop
Returns a new instance of Loop.
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# File 'lib/mirah/ast/flow.rb', line 103
def initialize(parent, position, check_first, negative, &block)
@check_first = check_first
@negative = negative
@children = [
Body.new(self, position),
nil,
Body.new(self, position),
nil,
Body.new(self, position),
]
super(parent, position) do |l|
condition, body = yield(l)
[self.init, condition, self.pre, body, self.post]
end
end
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Instance Attribute Details
#check_first ⇒ Object
Returns the value of attribute check_first.
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# File 'lib/mirah/ast/flow.rb', line 101
def check_first
@check_first
end
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#negative ⇒ Object
Returns the value of attribute negative.
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# File 'lib/mirah/ast/flow.rb', line 101
def negative
@negative
end
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#redo ⇒ Object
Returns the value of attribute redo.
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# File 'lib/mirah/ast/flow.rb', line 101
def redo
@redo
end
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Instance Method Details
#check_first? ⇒ Boolean
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# File 'lib/mirah/ast/flow.rb', line 140
def check_first?; @check_first; end
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#compile(compiler, expression) ⇒ Object
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# File 'lib/mirah/compiler/flow.rb', line 38
def compile(compiler, expression)
compiler.line(line_number)
compiler.loop(self, expression)
rescue Exception => ex
raise Mirah::InternalCompilerError.wrap(ex, self)
end
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#expr?(compiler) ⇒ Boolean
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# File 'lib/mirah/jvm/source_generator/precompile.rb', line 74
def expr?(compiler)
false
end
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#infer(typer, expression) ⇒ Object
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# File 'lib/mirah/ast/flow.rb', line 120
def infer(typer, expression)
unless resolved?
child_types = children.map do |c|
if c.nil? || (Body === c && c.empty?)
typer.no_type
else
typer.infer(c, true)
end
end
if child_types.any? {|t| t.nil?}
typer.defer(self)
else
resolved!
@inferred_type = typer.null_type
end
end
@inferred_type
end
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# File 'lib/mirah/ast/flow.rb', line 163
def init?
init && !(init.kind_of?(Body) && init.empty?)
end
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# File 'lib/mirah/ast/flow.rb', line 141
def negative?; @negative; end
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# File 'lib/mirah/ast/flow.rb', line 171
def post?
post && !(post.kind_of?(Body) && post.empty?)
end
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# File 'lib/mirah/ast/flow.rb', line 167
def pre?
pre && !(pre.kind_of?(Body) && pre.empty?)
end
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#precompile(compiler) ⇒ Object
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# File 'lib/mirah/jvm/source_generator/precompile.rb', line 78
def precompile(compiler)
compile(compiler, false)
temp(compiler, 'null')
end
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# File 'lib/mirah/ast/flow.rb', line 143
def redo?
if @redo.nil?
nodes = @children.dup
until nodes.empty?
node = nodes.shift
while node.respond_to?(:inlined) && node.inlined
node = node.inlined
end
next if node.nil? || Loop === node
if Redo === node
return @redo = true
end
nodes.insert(-1, *node.children.flatten)
end
return @redo = false
else
@redo
end
end
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#to_s ⇒ Object
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# File 'lib/mirah/ast/flow.rb', line 175
def to_s
"Loop(check_first = #{check_first?}, negative = #{negative?})"
end
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