21 lines
793 B
Ruby
21 lines
793 B
Ruby
|
module Parser
|
||
|
|
module Control
|
||
|
|
include Parslet
|
||
|
|
rule(:conditional) do
|
||
|
|
keyword_if >>
|
||
|
|
(( (value_expression|operator_expression).as(:conditional) ) |
|
||
|
|
left_parenthesis >> (operator_expression|value_expression).as(:conditional) >> right_parenthesis) >>
|
||
|
|
newline >> expressions_else.as(:if_true) >> newline >> expressions_end.as(:if_false)
|
||
|
|
end
|
||
|
|
|
||
|
|
rule(:while_do) do
|
||
|
|
keyword_while >> left_parenthesis >> (operator_expression|value_expression).as(:while_cond) >>
|
||
|
|
right_parenthesis >> keyword_do >> newline >>
|
||
|
|
expressions_end.as(:body)
|
||
|
|
end
|
||
|
|
rule(:simple_return) do
|
||
|
|
keyword_return >> (operator_expression|value_expression).as(:return_expression)
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|