org.millscript.millscript.syntax
Class ParenSyntax

java.lang.Object
  org.millscript.millscript.syntax.Syntax
      org.millscript.millscript.syntax.PostfixSyntax
          org.millscript.millscript.syntax.BothfixSyntax
              org.millscript.millscript.syntax.ParenSyntax

All Implemented Interfaces:

PostfixSyntaxInterface, PrefixSyntaxInterface

public final class ParenSyntax
extends BothfixSyntax

This class implements parenthesis syntax. The open parenthesis character can be both prefix and postfix. In the postfix form, you are applying a function, while in prefix form you are writing a simple expression.

Postfix: Function application

E( E' )

Prefix: Simple expression

( E )

See Also:

ApplyExpr

Constructor Summary

ParenSyntax()

Method Summary

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

ParenSyntax

public ParenSyntax()

Method Detail

postfix

public ApplyExpr 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)

prefix

public Expr prefix(java.lang.String sym,
                   Parser parser)

Description copied from interface: PrefixSyntaxInterface

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.

Specified by:

prefix in interface PrefixSyntaxInterface

Specified by:

prefix in class BothfixSyntax

Parameters:

sym - the symbol to parse this syntax for

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

Returns:

an expression for this syntax

See Also:

PrefixSyntaxInterface.prefix(java.lang.String, org.millscript.millscript.syntax.Parser)