Module: RLSL::Prism::Emitters::BaseEmitter::ControlFlowEmission

Included in:
RLSL::Prism::Emitters::BaseEmitter
Defined in:
lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb

Instance Method Summary collapse

Instance Method Details

#elsif_node?(node) ⇒ Boolean

Returns:

  • (Boolean) 


48
49
50
51
52
53
 
# File 'lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb', line 48

def elsif_node?(node)
  return true if node.is_a?(IR::IfStatement)
  return false unless node.is_a?(IR::Block)

  node.statements.length == 1 && node.statements.first.is_a?(IR::IfStatement)
end

#emit_break(_node) ⇒ Object 



75
76
77
 
# File 'lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb', line 75

def emit_break(_node)
  "break"
end

#emit_conditional(node, needs_return:) ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb', line 17

def emit_conditional(node, needs_return:)
  condition = emit(node.condition)
  then_code = emit_branch(node.then_branch, needs_return: needs_return)

  return "#{indent}if (#{condition}) {\n#{then_code}#{indent}}#{needs_return ? "\n" : ""}" unless node.else_branch

  if elsif_node?(node.else_branch)
    elsif_code = emit_elsif(node.else_branch, needs_return: needs_return)
    "#{indent}if (#{condition}) {\n#{then_code}#{indent}} #{elsif_code}#{needs_return ? "\n" : ""}"
  else
    else_code = emit_branch(node.else_branch, needs_return: needs_return)
    "#{indent}if (#{condition}) {\n#{then_code}#{indent}} else {\n#{else_code}#{indent}}#{needs_return ? "\n" : ""}"
  end
end

#emit_elsif(node, needs_return: false) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb', line 32

def emit_elsif(node, needs_return: false)
  if_node = node.is_a?(IR::Block) ? node.statements.first : node
  condition = emit(if_node.condition)
  then_code = emit_branch(if_node.then_branch, needs_return: needs_return)

  return "else if (#{condition}) {\n#{then_code}#{indent}}" unless if_node.else_branch

  if elsif_node?(if_node.else_branch)
    elsif_code = emit_elsif(if_node.else_branch, needs_return: needs_return)
    "else if (#{condition}) {\n#{then_code}#{indent}} #{elsif_code}"
  else
    else_code = emit_branch(if_node.else_branch, needs_return: needs_return)
    "else if (#{condition}) {\n#{then_code}#{indent}} else {\n#{else_code}#{indent}}"
  end
end

#emit_for_loop(node) ⇒ Object 



59
60
61
62
63
64
65
66
 
# File 'lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb', line 59

def emit_for_loop(node)
  var = node.variable
  start_val = emit(node.range_start)
  end_val = emit(node.range_end)
  body = emit_indented_block(node.body)

  "for (int #{var} = #{start_val}; #{var} < #{end_val}; #{var}++) {\n#{body}#{indent}}"
end

#emit_if_statement(node) ⇒ Object 



13
14
15
 
# File 'lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb', line 13

def emit_if_statement(node)
  emit_conditional(node, needs_return: return_context?)
end

#emit_return(node) ⇒ Object 



55
56
57
 
# File 'lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb', line 55

def emit_return(node)
  node.expression ? "return #{emit(node.expression)}" : "return"
end

#emit_tuple_return(node) ⇒ Object 



8
9
10
11
 
# File 'lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb', line 8

def emit_tuple_return(node)
  elements = node.elements.map { |elem| emit(elem) }.join(", ")
  "#{indent}return (#{current_return_struct_name}){#{elements}};\n"
end

#emit_while_loop(node) ⇒ Object 



68
69
70
71
72
73
 
# File 'lib/rlsl/prism/emitters/base_emitter/control_flow_emission.rb', line 68

def emit_while_loop(node)
  condition = emit(node.condition)
  body = emit_indented_block(node.body)

  "while (#{condition}) {\n#{body}#{indent}}"
end