Method: Parser#consume

Defined in:
lib/antlr4/Parser.rb

#consume ⇒ Object

Consume and return the #getCurrentToken current symbol.

<p>E.g., given the following input with A being the current lookahead symbol, self function moves the cursor to B and returns A.</p>

<pre>

A B
^

</pre>

If the parser is not in error recovery mode, the consumed symbol is added to the parse tree using ParserRuleContext#addChild(Token), and ParseTreeListener#visitTerminal is called on any parse listeners. If the parser is in error recovery mode, the consumed symbol is added to the parse tree using ParserRuleContext#addErrorNode(Token), and ParseTreeListener#visitErrorNode is called on any parse listeners.



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# File 'lib/antlr4/Parser.rb', line 308

def consume()
    o = self.getCurrentToken()
    if o.type != Token::EOF then
        self.getInputStream().consume()
    end
    hasListener = ! self.parseListeners.empty? 
    if self.buildParseTrees or hasListener then
        if self.errHandler.inErrorRecoveryMode(self) then
            node = self.ctx.addErrorNode(o)
        else
            node = self.ctx.addTokenNode(o)
        end
        self.parseListeners.each {|listener| listener.visitTerminal(node) }
    end
    return o
end