[Cyan]<CedarChest6.0>Express>ExpressParser.mesa!1

ExpressParser.mesa

Vanilla recursive descent parser for the Express package

Created Tuesday, July 17, 1984 10:16 pm PDT

Last edited by Eric Nickell, July 17, 1984 10:25:07 pm PDT

DIRECTORY

Express USING [ClientProcList, Symbols],

ExpressToken USING [TokenStream],

ExpressTree USING [XTree];

ExpressParser: CEDAR DEFINITIONS ~ {

ClientProcList: TYPE ~ Express.ClientProcList;

Symbols: TYPE ~ Express.Symbols;

TokenStream: TYPE ~ ExpressToken.TokenStream;

XTree: TYPE ~ ExpressTree.XTree;

ParseExpression: PROC [ts: TokenStream, symbols: Symbols, cProcs: ClientProcList ← NIL] RETURNS [exp: XTree];

Converts the token stream into an expression tree