Class: ParseState
Overview
Main class and structure used to compute the cyclomatic complexity of Ruby programs.
Direct Known Subclasses
Constant Summary collapse
- @@top_state =
nil
- @@token_counter =
TokenCounter.new
Instance Attribute Summary collapse
-
#children ⇒ Object
Returns the value of attribute children.
-
#complexity ⇒ Object
Returns the value of attribute complexity.
-
#lines ⇒ Object
Returns the value of attribute lines.
-
#name ⇒ Object
Returns the value of attribute name.
-
#parent ⇒ Object
Returns the value of attribute parent.
Class Method Summary collapse
Instance Method Summary collapse
- #calc_complexity ⇒ Object
- #calc_lines ⇒ Object
- #compute_state(formater) ⇒ Object
- #compute_state_for_global(formater) ⇒ Object
-
#count_tokens? ⇒ Boolean
Count the tokens parsed if true else ignore them.
- #do_begin_token(token) ⇒ Object
- #do_block_token(token) ⇒ Object
- #do_case_token(token) ⇒ Object
- #do_class_token(token) ⇒ Object
- #do_comment_token(token) ⇒ Object
- #do_conditional_do_control_token(token) ⇒ Object
- #do_conditional_token(token) ⇒ Object
- #do_constant_token(token) ⇒ Object
- #do_def_token(token) ⇒ Object
- #do_else_token(token) ⇒ Object
- #do_end_token(token) ⇒ Object
- #do_identifier_token(token) ⇒ Object
- #do_module_token(token) ⇒ Object
- #do_one_line_conditional_token(token) ⇒ Object
- #do_right_brace_token(token) ⇒ Object
- #do_symbol_token(token) ⇒ Object
- #end_debug ⇒ Object
-
#initialize(lexer, parent = nil) ⇒ ParseState
constructor
A new instance of ParseState.
- #lexer=(lexer) ⇒ Object
-
#lexer_loop?(token) ⇒ Boolean
Ruby-Lexer can go into a loop if the file does not end with a newline.
- #make_state(type, parent = nil) ⇒ Object
- #parse ⇒ Object
- #parse_token(token) ⇒ Object
- #top_state? ⇒ Boolean
Constructor Details
#initialize(lexer, parent = nil) ⇒ ParseState
Returns a new instance of ParseState.
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# File 'lib/saikuro.rb', line 169 def initialize(lexer,parent=nil) @name = "" @children = Array.new @complexity = 0 @parent = parent @lexer = lexer @run = true # To catch one line def statements, We always have one line. @lines = 0 @last_token_line_and_char = Array.new end |
Instance Attribute Details
#children ⇒ Object
Returns the value of attribute children.
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# File 'lib/saikuro.rb', line 152 def children @children end |
#complexity ⇒ Object
Returns the value of attribute complexity.
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# File 'lib/saikuro.rb', line 152 def complexity @complexity end |
#lines ⇒ Object
Returns the value of attribute lines.
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# File 'lib/saikuro.rb', line 152 def lines @lines end |
#name ⇒ Object
Returns the value of attribute name.
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# File 'lib/saikuro.rb', line 152 def name @name end |
#parent ⇒ Object
Returns the value of attribute parent.
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# File 'lib/saikuro.rb', line 152 def parent @parent end |
Class Method Details
.get_token_counter ⇒ Object
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# File 'lib/saikuro.rb', line 165 def ParseState.get_token_counter @@token_counter end |
.make_top_state ⇒ Object
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# File 'lib/saikuro.rb', line 155 def ParseState.make_top_state() @@top_state = ParseState.new(nil) @@top_state.name = "__top__" @@top_state end |
.set_token_counter(counter) ⇒ Object
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# File 'lib/saikuro.rb', line 162 def ParseState.set_token_counter(counter) @@token_counter = counter end |
Instance Method Details
#calc_complexity ⇒ Object
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# File 'lib/saikuro.rb', line 196 def calc_complexity complexity = @complexity children.each do |child| complexity += child.calc_complexity end complexity end |
#calc_lines ⇒ Object
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# File 'lib/saikuro.rb', line 204 def calc_lines lines = @lines children.each do |child| lines += child.calc_lines end lines end |
#compute_state(formater) ⇒ Object
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# File 'lib/saikuro.rb', line 212 def compute_state(formater) if top_state? compute_state_for_global(formater) end @children.each do |s| s.compute_state(formater) end end |
#compute_state_for_global(formater) ⇒ Object
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# File 'lib/saikuro.rb', line 222 def compute_state_for_global(formater) global_def, @children = @children.partition do |s| !s.kind_of?(ParseClass) end return if global_def.empty? gx = global_def.inject(0) { |c,s| s.calc_complexity } gl = global_def.inject(0) { |c,s| s.calc_lines } formater.start_class_compute_state("Global", "", gx, gl) global_def.each do |s| s.compute_state(formater) end formater.end_class_compute_state("") end |
#count_tokens? ⇒ Boolean
Count the tokens parsed if true else ignore them.
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# File 'lib/saikuro.rb', line 237 def count_tokens? true end |
#do_begin_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 282 def do_begin_token(token) make_state(EndableParseState, self) end |
#do_block_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 319 def do_block_token(token) make_state(ParseBlock,self) end |
#do_case_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 331 def do_case_token(token) make_state(EndableParseState, self) end |
#do_class_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 286 def do_class_token(token) make_state(ParseClass,self) end |
#do_comment_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 351 def do_comment_token(token) make_state(ParseComment, self) end |
#do_conditional_do_control_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 327 def do_conditional_do_control_token(token) make_state(ParseDoCond,self) end |
#do_conditional_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 323 def do_conditional_token(token) make_state(ParseCond,self) end |
#do_constant_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 298 def do_constant_token(token) nil end |
#do_def_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 294 def do_def_token(token) make_state(ParseDef,self) end |
#do_else_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 346 def do_else_token(token) STDOUT.puts "Ignored/Unknown Token:#{token.class}" if $VERBOSE nil end |
#do_end_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 314 def do_end_token(token) end_debug nil end |
#do_identifier_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 302 def do_identifier_token(token) if (token.name == "__END__" && token.char_no.to_i == 0) # The Ruby code has stopped and the rest is data so cease parsing. @run = false end nil end |
#do_module_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 290 def do_module_token(token) make_state(ParseModule,self) end |
#do_one_line_conditional_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 335 def do_one_line_conditional_token(token) # This is an if with no end @complexity += 1 #STDOUT.puts "got IF_MOD: #{self.to_yaml}" if $VERBOSE #if state.type != "class" && state.type != "def" && state.type != "cond" #STDOUT.puts "Changing IF_MOD Parent" if $VERBOSE #state = state.parent #@run = false nil end |
#do_right_brace_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 310 def do_right_brace_token(token) nil end |
#do_symbol_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 355 def do_symbol_token(token) make_state(ParseSymbol, self) end |
#end_debug ⇒ Object
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# File 'lib/saikuro.rb', line 419 def end_debug STDOUT.puts "got an end: #{@name} in #{self.class.name}" if $VERBOSE if @parent.nil? STDOUT.puts "DEBUG: Line #{@lexer.line_no}" STDOUT.puts "DEBUG: #{@name}; #{self.class}" # to_yaml can cause an infinite loop? #STDOUT.puts "TOP: #{@@top_state.to_yaml}" #STDOUT.puts "TOP: #{@@top_state.inspect}" # This may not be an error? #exit 1 end end |
#lexer=(lexer) ⇒ Object
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# File 'lib/saikuro.rb', line 185 def lexer=(lexer) @run = true @lexer = lexer end |
#lexer_loop?(token) ⇒ Boolean
Ruby-Lexer can go into a loop if the file does not end with a newline.
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# File 'lib/saikuro.rb', line 259 def lexer_loop?(token) return false if @last_token_line_and_char.empty? loop_flag = false last = @last_token_line_and_char.last line = last[0] char = last[1] ltok = last[2] if ( (line == @lexer.line_no.to_i) && (char == @lexer.char_no.to_i) && (ltok.class == token.class) ) # We are potentially in a loop if @last_token_line_and_char.size >= 3 loop_flag = true end else # Not in a loop so clear stack @last_token_line_and_char = Array.new end loop_flag end |
#make_state(type, parent = nil) ⇒ Object
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# File 'lib/saikuro.rb', line 190 def make_state(type,parent = nil) cstate = type.new(@lexer,self) parent.children<< cstate cstate end |
#parse ⇒ Object
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# File 'lib/saikuro.rb', line 241 def parse while @run do tok = @lexer.token @run = false if tok.nil? if lexer_loop?(tok) STDERR.puts "Lexer loop at line : #{@lexer.line_no} char #{@lexer.char_no}." @run = false end @last_token_line_and_char<< [@lexer.line_no.to_i, @lexer.char_no.to_i, tok] if $VERBOSE puts "DEBUG: #{@lexer.line_no} #{tok.class}:#{tok.name if tok.respond_to?(:name)}" end @@token_counter.count_token(@lexer.line_no, tok) if count_tokens? parse_token(tok) end end |
#parse_token(token) ⇒ Object
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# File 'lib/saikuro.rb', line 359 def parse_token(token) state = nil case token when TkCLASS state = do_class_token(token) when TkMODULE state = do_module_token(token) when TkDEF state = do_def_token(token) when TkCONSTANT # Nothing to do with a constant at top level? state = do_constant_token(token) when TkIDENTIFIER,TkFID # Nothing to do at top level? state = do_identifier_token(token) when TkRBRACE # Nothing to do at top level state = do_right_brace_token(token) when TkEND state = do_end_token(token) # At top level this might be an error... when TkDO,TkfLBRACE state = do_block_token(token) when TkIF,TkUNLESS state = do_conditional_token(token) when TkWHILE,TkUNTIL,TkFOR state = do_conditional_do_control_token(token) when TkELSIF #,TkELSE @complexity += 1 when TkELSE # Else does not increase complexity when TkCASE state = do_case_token(token) when TkWHEN @complexity += 1 when TkBEGIN state = do_begin_token(token) when TkRESCUE # Maybe this should add complexity and not begin @complexity += 1 when TkIF_MOD, TkUNLESS_MOD, TkUNTIL_MOD, TkWHILE_MOD, TkQUESTION state = do_one_line_conditional_token(token) when TkNL # @lines += 1 when TkRETURN # Early returns do not increase complexity as the condition that # calls the return is the one that increases it. when TkCOMMENT state = do_comment_token(token) when TkSYMBEG state = do_symbol_token(token) when TkError STDOUT.puts "Lexer received an error for line #{@lexer.line_no} char #{@lexer.char_no}" else state = do_else_token(token) end state.parse if state end |
#top_state? ⇒ Boolean
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# File 'lib/saikuro.rb', line 181 def top_state? self == @@top_state end |