io.permazen.parse.expr

Class BinaryExprParser

java.lang.Object

io.permazen.parse.expr.BinaryExprParser

All Implemented Interfaces:

Parser<Node>

Direct Known Subclasses:

AdditiveExprParser, AssignmentExprParser, BitwiseAndParser, BitwiseOrParser, BitwiseXorParser, EqualityParser, LogicalAndParser, LogicalOrParser, MultiplicativeExprParser, RelationalExprParser, ShiftExprParser

public abstract class BinaryExprParser
extends Object
implements Parser<Node>

Support superclass for tail-recursive binary expression parsers for expressions of the form ARG1 OP ARG2.

See Also:

Tail Recursive Parser

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BinaryExprParser(Parser<? extends Node> lowerLevel, boolean leftAssociative, Op... ops) Primary constructor.
protected	BinaryExprParser(Parser<? extends Node> lowerLevel, Op... ops) Convenience constructor for left-associative operators.

Method Summary

Modifier and Type	Method and Description
protected Node	createNode(Op op, Node lhs, Node rhs)
Node	parse(ParseSession session, ParseContext ctx, boolean complete) Parse text from the given parse context.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.permazen.parse.Parser

applyIdentifierScope

Constructor Detail

BinaryExprParser

protected BinaryExprParser(Parser<? extends Node> lowerLevel,
                           boolean leftAssociative,
                           Op... ops)

Primary constructor.

Parameters:

lowerLevel - next lower parse level

leftAssociative - true for left-to-right association, false for right-to-left

ops - operations, with operations that have other operations as prefixes listed first

BinaryExprParser

protected BinaryExprParser(Parser<? extends Node> lowerLevel,
                           Op... ops)

Convenience constructor for left-associative operators.

Parameters:

lowerLevel - next lower parse level

ops - operations, with operations that have other operations as prefixes listed first

Method Detail

parse

public Node parse(ParseSession session,
                  ParseContext ctx,
                  boolean complete)

Description copied from interface: Parser

Parse text from the given parse context.

Generally speaking, this method may assume that any whitespace allowed before the item being parsed has already been skipped over (that's a matter for the containing parser).

Specified by:

parse in interface Parser<Node>

Parameters:

session - parse session

ctx - input to parse

complete - false if parse is "for real", true if only for tab completion calculation

Returns:

parsed value

createNode

protected Node createNode(Op op,
                          Node lhs,
                          Node rhs)