Class: Rubex::AST::Statement::IfBlock

Inherits:
Base
  • Object
show all
Includes:
Helper
Defined in:
lib/rubex/ast/statement/if_block.rb,
lib/rubex/ast/statement/if_block/else.rb,
lib/rubex/ast/statement/if_block/elsif.rb,
lib/rubex/ast/statement/if_block/helper.rb

Defined Under Namespace

Modules: Helper Classes: Else, Elsif

Instance Attribute Summary collapse

Attributes inherited from Base

#location

Instance Method Summary collapse

Methods included from Helper

#generate_code_for_statement

Methods inherited from Base

#==, #statement?

Constructor Details

#initialize(expr, statements, if_tail, location) ⇒ IfBlock

Returns a new instance of IfBlock.



9
10
11
12
13
14
 
# File 'lib/rubex/ast/statement/if_block.rb', line 9

def initialize(expr, statements, if_tail, location)
  super(location)
  @expr = expr
  @statements = statements
  @if_tail = if_tail
end

Instance Attribute Details

#expr ⇒ Object (readonly)

Returns the value of attribute expr.



6
7
8
 
# File 'lib/rubex/ast/statement/if_block.rb', line 6

def expr
  @expr
end

#if_tail ⇒ Object (readonly)

Returns the value of attribute if_tail.



6
7
8
 
# File 'lib/rubex/ast/statement/if_block.rb', line 6

def if_tail
  @if_tail
end

#statements ⇒ Object (readonly)

Returns the value of attribute statements.



6
7
8
 
# File 'lib/rubex/ast/statement/if_block.rb', line 6

def statements
  @statements
end

Instance Method Details

#analyse_statement(local_scope) ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
27
 
# File 'lib/rubex/ast/statement/if_block.rb', line 16

def analyse_statement(local_scope)
  @tail_exprs = if_tail_exprs # FIME: gets current expr too. make descriptive.
  @tail_exprs.each do |tail|
    tail.analyse_types local_scope
    tail.allocate_temps local_scope
  end

  @tail_exprs.each do |tail|
    tail.release_temps local_scope
  end
  super
end

#generate_code(code, local_scope) ⇒ Object 



41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
 
# File 'lib/rubex/ast/statement/if_block.rb', line 41

def generate_code(code, local_scope)
  @tail_exprs.each do |tail|
    tail.generate_evaluation_code(code, local_scope)
  end
  generate_code_for_statement 'if', code, local_scope, self

  tail = @if_tail
  while tail
    if tail.is_a?(Elsif)
      generate_code_for_statement 'else if', code, local_scope, tail
    elsif tail.is_a?(Else)
      generate_code_for_statement 'else', code, local_scope, tail
    end
    tail = tail.if_tail
  end

  @tail_exprs.each do |tail|
    tail.generate_disposal_code code
  end
end

#if_tail_exprs ⇒ Object 



29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/rubex/ast/statement/if_block.rb', line 29

def if_tail_exprs
  tail_exprs = []
  temp = self
  while temp.respond_to?(:if_tail) &&
        !temp.is_a?(Rubex::AST::Statement::IfBlock::Else)
    tail_exprs << temp.expr
    temp = temp.if_tail
  end

  tail_exprs
end