PluralFormsNode RelationalExpression()
{
PluralFormsNode p = MultiplicativeExpression();
if (p == null)
{
return(null);
}
PluralFormsNode n = p;
if (Token.TokenType == PluralFormsToken.Type.Greater ||
Token.TokenType == PluralFormsToken.Type.Less ||
Token.TokenType == PluralFormsToken.Type.GreaterOrEqual ||
Token.TokenType == PluralFormsToken.Type.LessOrEqual)
{
PluralFormsNode qn = new PluralFormsNode(new PluralFormsToken(Token));
if (!NextToken())
{
return(null);
}
p = MultiplicativeExpression();
if (p == null)
{
return(null);
}
qn.SetNode(1, p);
qn.SetNode(0, n);
return(qn);
}
return(n);
}
PluralFormsNode MultiplicativeExpression()
{
PluralFormsNode p = PmExpression();
if (p == null)
{
return(null);
}
PluralFormsNode n = p;
if (Token.TokenType == PluralFormsToken.Type.Reminder)
{
PluralFormsNode qn = new PluralFormsNode(new PluralFormsToken(Token));
if (!NextToken())
{
return(null);
}
p = PmExpression();
if (p == null)
{
return(null);
}
qn.SetNode(1, p);
qn.SetNode(0, n);
return(qn);
}
return(n);
}
PluralFormsNode EqualityExpression()
{
PluralFormsNode p = RelationalExpression();
if (p == null)
{
return(null);
}
PluralFormsNode n = p;
if (Token.TokenType == PluralFormsToken.Type.Equal || Token.TokenType == PluralFormsToken.Type.NotEqual)
{
PluralFormsNode qn = new PluralFormsNode(new PluralFormsToken(Token));
if (!NextToken())
{
return(null);
}
p = RelationalExpression();
if (p == null)
{
return(null);
}
qn.SetNode(1, p);
qn.SetNode(0, n);
return(qn);
}
return(n);
}
PluralFormsNode Expression()
{
PluralFormsNode p = LogicalOrExpression();
if (p == null)
{
return(null);
}
PluralFormsNode n = p;
if (Token.TokenType == PluralFormsToken.Type.Question)
{
PluralFormsNode qn = new PluralFormsNode(new PluralFormsToken(Token));
if (!NextToken())
{
return(null);
}
p = Expression();
if (p == null)
{
return(null);
}
qn.SetNode(1, p);
if (Token.TokenType != PluralFormsToken.Type.Colon)
{
return(null);
}
if (!NextToken())
{
return(null);
}
p = Expression();
if (p == null)
{
return(null);
}
qn.SetNode(2, p);
qn.SetNode(0, n);
return(qn);
}
return(n);
}
PluralFormsNode LogicalAndExpression()
{
PluralFormsNode p = EqualityExpression();
if (p == null)
{
return(null);
}
PluralFormsNode ln = p; // left
if (Token.TokenType == PluralFormsToken.Type.LogicalAnd)
{
PluralFormsNode un = new PluralFormsNode(new PluralFormsToken(Token)); // up
if (!NextToken())
{
return(null);
}
p = LogicalAndExpression();
if (p == null)
{
return(null);
}
PluralFormsNode rn = p; // right
if (rn.Token.TokenType == PluralFormsToken.Type.LogicalAnd)
{
// transform 1 && (2 && 3) -> (1 && 2) && 3
// u r
// l r -> u 3
// 2 3 l 2
un.SetNode(0, ln);
un.SetNode(1, rn.ReleaseNode(0));
rn.SetNode(0, un);
return(rn);
}
un.SetNode(0, ln);
un.SetNode(1, rn);
return(un);
}
return(ln);
}
PluralFormsNode LogicalOrExpression()
{
PluralFormsNode p = LogicalAndExpression();
if (p == null)
{
return(null);
}
PluralFormsNode ln = p;
if (Token.TokenType == PluralFormsToken.Type.LogicalOr)
{
PluralFormsNode un = new PluralFormsNode(new PluralFormsToken(Token));
if (!NextToken())
{
return(null);
}
p = LogicalOrExpression();
if (p == null)
{
return(null);
}
PluralFormsNode rn = p; // right
if (rn.Token.TokenType == PluralFormsToken.Type.LogicalOr)
{
// see logicalAndExpression comment
un.SetNode(0, ln);
un.SetNode(1, rn.ReleaseNode(0));
rn.SetNode(0, un);
return(rn);
}
un.SetNode(0, ln);
un.SetNode(1, rn);
return(un);
}
return(ln);
}
PluralFormsNode RelationalExpression()
{
PluralFormsNode p = MultiplicativeExpression();
if (p == null)
return null;
PluralFormsNode n = p;
if (Token.TokenType == PluralFormsToken.Type.Greater
|| Token.TokenType == PluralFormsToken.Type.Less
|| Token.TokenType == PluralFormsToken.Type.GreaterOrEqual
|| Token.TokenType == PluralFormsToken.Type.LessOrEqual) {
PluralFormsNode qn = new PluralFormsNode(new PluralFormsToken(Token));
if (! NextToken()) {
return null;
}
p = MultiplicativeExpression();
if (p == null) {
return null;
}
qn.SetNode(1, p);
qn.SetNode(0, n);
return qn;
}
return n;
}
PluralFormsNode MultiplicativeExpression()
{
PluralFormsNode p = PmExpression();
if (p == null) {
return null;
}
PluralFormsNode n = p;
if (Token.TokenType == PluralFormsToken.Type.Reminder) {
PluralFormsNode qn = new PluralFormsNode(new PluralFormsToken(Token));
if (! NextToken()) {
return null;
}
p = PmExpression();
if (p == null) {
return null;
}
qn.SetNode(1, p);
qn.SetNode(0, n);
return qn;
}
return n;
}
PluralFormsNode LogicalOrExpression()
{
PluralFormsNode p = LogicalAndExpression();
if (p == null)
return null;
PluralFormsNode ln = p;
if (Token.TokenType == PluralFormsToken.Type.LogicalOr) {
PluralFormsNode un = new PluralFormsNode(new PluralFormsToken(Token));
if (! NextToken()) {
return null;
}
p = LogicalOrExpression();
if (p == null) {
return null;
}
PluralFormsNode rn = p; // right
if (rn.Token.TokenType == PluralFormsToken.Type.LogicalOr) {
// see logicalAndExpression comment
un.SetNode(0, ln);
un.SetNode(1, rn.ReleaseNode(0));
rn.SetNode(0, un);
return rn;
}
un.SetNode(0, ln);
un.SetNode(1, rn);
return un;
}
return ln;
}
PluralFormsNode LogicalAndExpression()
{
PluralFormsNode p = EqualityExpression();
if (p == null)
return null;
PluralFormsNode ln = p; // left
if (Token.TokenType == PluralFormsToken.Type.LogicalAnd) {
PluralFormsNode un = new PluralFormsNode(new PluralFormsToken(Token)); // up
if (! NextToken()) {
return null;
}
p = LogicalAndExpression();
if (p == null) {
return null;
}
PluralFormsNode rn = p; // right
if (rn.Token.TokenType == PluralFormsToken.Type.LogicalAnd) {
// transform 1 && (2 && 3) -> (1 && 2) && 3
// u r
// l r -> u 3
// 2 3 l 2
un.SetNode(0, ln);
un.SetNode(1, rn.ReleaseNode(0));
rn.SetNode(0, un);
return rn;
}
un.SetNode(0, ln);
un.SetNode(1, rn);
return un;
}
return ln;
}
PluralFormsNode Expression()
{
PluralFormsNode p = LogicalOrExpression();
if (p == null)
return null;
PluralFormsNode n = p;
if (Token.TokenType == PluralFormsToken.Type.Question) {
PluralFormsNode qn = new PluralFormsNode(new PluralFormsToken(Token));
if (! NextToken()) {
return null;
}
p = Expression();
if (p == null) {
return null;
}
qn.SetNode(1, p);
if (Token.TokenType != PluralFormsToken.Type.Colon) {
return null;
}
if (! NextToken()) {
return null;
}
p = Expression();
if (p == null) {
return null;
}
qn.SetNode(2, p);
qn.SetNode(0, n);
return qn;
}
return n;
}
PluralFormsNode EqualityExpression()
{
PluralFormsNode p = RelationalExpression();
if (p == null)
return null;
PluralFormsNode n = p;
if (Token.TokenType == PluralFormsToken.Type.Equal || Token.TokenType == PluralFormsToken.Type.NotEqual) {
PluralFormsNode qn = new PluralFormsNode(new PluralFormsToken(Token));
if (! NextToken()) {
return null;
}
p = RelationalExpression();
if (p == null) {
return null;
}
qn.SetNode(1, p);
qn.SetNode(0, n);
return qn;
}
return n;
}