Package com.google.auto.value.processor.escapevelocity

Class Parser.OperatorParser

java.lang.Object

com.google.auto.value.processor.escapevelocity.Parser.OperatorParser

Enclosing class:

Parser

private class Parser.OperatorParser
extends Object

An operator-precedence parser for the binary operations we understand. It implements an algorithm from Wikipedia that uses recursion rather than having an explicit stack of operators and values.

Field Summary

Fields

Modifier and Type	Field	Description
private Parser.Operator	currentOperator	The operator we have just scanned, in the same way that Parser.c is the character we have just read.

Constructor Summary

Constructors

Constructor	Description
OperatorParser()

Method Summary

Modifier and Type	Method	Description
private void	nextOperator()	Updates currentOperator to be an operator read from the input, or Parser.Operator.STOP if there is none.
(package private) ExpressionNode	parse(ExpressionNode lhs, int minPrecedence)	Parse a subexpression whose left-hand side is lhs and where we only consider operators with precedence at least minPrecedence.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

currentOperator

private Parser.Operator currentOperator

The operator we have just scanned, in the same way that Parser.c is the character we have just read. If we were not able to scan an operator, this will be Parser.Operator.STOP.

Constructor Details

OperatorParser

OperatorParser()
        throws IOException

Throws:

IOException

Method Details

parse

ExpressionNode parse(ExpressionNode lhs,
 int minPrecedence)
              throws IOException

Parse a subexpression whose left-hand side is lhs and where we only consider operators with precedence at least minPrecedence.

Returns:

the parsed subexpression

Throws:

IOException

nextOperator

private void nextOperator()
                   throws IOException

Updates currentOperator to be an operator read from the input, or Parser.Operator.STOP if there is none.

Throws:

IOException