Single Pass

void parseStatement() {

case Token.IDENTIFIER:

name = currentToken.spelling;

inScope( name );

acceptIt();

switch( currentToken.kind )

case Token.BECOMES

acceptIt();

lhsType = parseExpression();

rhsType = getIdType( name );

equivTypes( lhsType,rhsType );

plantSTORE( name, rhsType );

break;

x := x + 1;