Class: TraceListener

Inherits:
ParseTreeListener show all
Defined in:
lib/antlr4/TraceListener.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parser = nil) ⇒ TraceListener

Returns a new instance of TraceListener.



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# File 'lib/antlr4/TraceListener.rb', line 4

def initialize(parser=nil)
    super()
    if parser then
      @parser = parser 
    end
end

Instance Attribute Details

#parser ⇒ Object (readonly)

Returns the value of attribute parser.



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# File 'lib/antlr4/TraceListener.rb', line 3

def parser
  @parser
end

Instance Method Details

#enterEveryRule(ctx) ⇒ Object 



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# File 'lib/antlr4/TraceListener.rb', line 10

def enterEveryRule(ctx)
    puts "enter   #{parser.ruleNames[ctx.ruleIndex]}, LT(1)=#{parser.input.LT(1).text.to_s}"
end

#exitEveryRule(ctx) ⇒ Object 



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# File 'lib/antlr4/TraceListener.rb', line 20

def exitEveryRule(ctx)
    puts "exit    #{parser.ruleNames[ctx.ruleIndex]}, LT(1)=#{parser.input.LT(1).text}"
end

#visitErrorNode(node) ⇒ Object 



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# File 'lib/antlr4/TraceListener.rb', line 17

def visitErrorNode(node)
end

#visitTerminal(node) ⇒ Object 



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# File 'lib/antlr4/TraceListener.rb', line 14

def visitTerminal(node)
    puts "consume #{node.symbol} rule #{parser.ruleNames[parser.ctx.ruleIndex]}"
end