org.millscript.millscript.syntax
Class SimplePostfixSyntax

java.lang.Object
  org.millscript.millscript.syntax.Syntax
      org.millscript.millscript.syntax.PostfixSyntax
          org.millscript.millscript.syntax.SimplePostfixSyntax

All Implemented Interfaces:

PostfixSyntaxInterface

Direct Known Subclasses:

AndAbsentSyntax, AndSyntax, AppendSyntax, AssignSyntax, CommaSyntax, MapletSyntax, OrAbsentSyntax, OrSyntax

public abstract class SimplePostfixSyntax
extends PostfixSyntax

This class represents simple postfix syntax. This is a convenience class to reduce the work required to implement a piece of simple postfix syntax. The 'simple' refers to the fact that the syntax follows the form

<expr> S <expr>

and as such is rather simple. In these situations, the syntax doesn't involve other functions

e.g. <expr> && <expr>

Constructor Summary

SimplePostfixSyntax()

Method Summary

Expr	postfix(java.lang.String sym, int prec, Expr lhs, Parser parser) Parse the syntax for the specified symbol, using the specified Parser.

Methods inherited from class org.millscript.millscript.syntax.PostfixSyntax

getPrecedence, setPrec

Methods inherited from class java.lang.Object

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

Constructor Detail

SimplePostfixSyntax

public SimplePostfixSyntax()

Method Detail

postfix

public Expr postfix(java.lang.String sym,
                    int prec,
                    Expr lhs,
                    Parser parser)

Description copied from interface: PostfixSyntaxInterface

Parse the syntax for the specified symbol, using the specified Parser. The symbol is specified because different symbols may share the same syntax, but result in slightly different expressions. The Parser is supplied as the source to parse from. As this is postfix syntax, we are also supplied the expression on the left hand side of the symbol along with the current precedence we should parse to.

Specified by:

postfix in interface PostfixSyntaxInterface

Specified by:

postfix in class PostfixSyntax

Parameters:

sym - the symbol to parse this syntax for

prec - the current precedence we should parse to

lhs - the expression on the left hand side of the specified symbol

parser - Parser to parse from, i.e. the source to parse from

Returns:

an expression for this syntax

See Also:

PostfixSyntaxInterface.postfix(java.lang.String, int, org.millscript.millscript.expr.Expr, org.millscript.millscript.syntax.Parser)