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Versions: 19
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Contents
require 'ripper'
module Hamlit
module Concerns
module Balanceable
def fetch_balanced_braces(all_tokens)
fetch_balanced_tokens(all_tokens, :on_lbrace, :on_rbrace)
end
def fetch_balanced_parentheses(all_tokens)
fetch_balanced_tokens(all_tokens, :on_lparen, :on_rparen)
end
def fetch_balanced_embexprs(all_tokens)
tokens = all_tokens[1..-1] # ignore first `"`
fetch_balanced_tokens(tokens, :on_embexpr_beg, :on_embexpr_end)
end
def balanced_braces_exist?(tokens)
balanced_tokens_exist?(tokens, :on_lbrace, :on_rbrace)
end
def balanced_parens_exist?(tokens)
balanced_tokens_exist?(tokens, :on_lparen, :on_rparen)
end
def balanced_embexprs_exist?(tokens)
tokens = tokens[1..-1] # ignore first `"`
balanced_tokens_exist?(tokens, :on_embexpr_beg, :on_embexpr_end)
end
private
def fetch_balanced_tokens(all_tokens, open_token, close_token)
tokens = []
open_count = 0
all_tokens.each_with_index do |token, index|
(row, col), type, str = token
case type
when open_token then open_count += 1
when close_token then open_count -= 1
end
tokens << token
break if open_count == 0
end
tokens
end
def balanced_tokens_exist?(tokens, open_token, close_token)
open_count = 0
tokens.each do |token|
(row, col), type, str = token
case type
when open_token then open_count += 1
when close_token then open_count -= 1
end
break if open_count == 0
end
open_count == 0
end
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems