VarDeclaration Parse(Queue <LexerNode> lexers, CBufferNode parent)
{
var variable = VarDeclarationParse(lexers);
variable.Parent = parent;
return(variable);
}
public void Visit(CBufferNode cbuff)
{
cbuff.VarDeclaration.Handle(this);
cbuff.Register.Handle(this);
cbuff.Children.ForEach(x => x.Handle(this));
}
void Parse(Queue <LexerNode> lexers, DefinitionObjectNode parent)
{
var next = lexers.Peek();
switch (next.Token)
{
case LexerTokens.Operator:
switch (next.Value)
{
case ShaderSyntaxInfo.Semicolon:
lexers.Dequeue(); //skip lex
return;
}
break;
case LexerTokens.Comment:
parent.Children.Add(new CommentsNode()
{
Lex = lexers.Dequeue()
});
return;
case LexerTokens.Punctuation:
switch (next.Value)
{
case "#":
// ==== examples ==== //
// #include "./Shaders/Common.fx"
// ==== ++++++++ ==== //
lexers.Dequeue(); //for '#'
var id = new IncludeDeclaration {
Name = lexers.Dequeue(), //get key
Path = new StringNode {
NameLex = lexers.Dequeue()
}
};
parent.Children.Add(id);
return;
case "[": //attrinuter: [maxvertexcount(18)]
var body = new ListNode();
DelimitedBy(lexers, DelimeterParams.Attribute, body, lex => { while (lex.Any())
{
lex.Dequeue();
}
return(null); });
return;
}
break;
}
//specific keys to parse first
switch (next.Value)
{
case ShaderSyntaxInfo.StructKey:
var var = VarDeclarationParse(lexers);
var strn = new StructNode {
VarDeclaration = var, Parent = parent
};
using (semantic.RegisterStruct(var.DeclarationName.NameLex, strn)) {
parent.Children.Add(strn);
DelimitedBy(lexers, DelimeterParams.Sequences, strn.Children, lex => VarDeclarationWithSemanticNamesParse(lex, strn));
if (lexers.Peek().Value == ShaderSyntaxInfo.Semicolon)
{
//in some cases ';' is end of declaration
lexers.Dequeue();
}
}
return;
case ShaderSyntaxInfo.CbufferKey:
var cbn = new CBufferNode {
VarDeclaration = VarDeclarationParse(lexers), Parent = parent
};
lexers.Dequeue().ThrowIfNot(ShaderSyntaxInfo.Colon);
parent.Children.Add(cbn);
cbn.Register = Parse(lexers, new FunctionCallNode {
Parent = cbn, Name = new SystemName {
NameLex = lexers.Dequeue()
}
});
DelimitedBy(lexers, DelimeterParams.Sequences, cbn.Children, lex => Parse(lex, cbn));
return;
}
//parse any variable
var variable = VarDeclarationParse(lexers);
if (lexers.Peek().Value == ShaderSyntaxInfo.Semicolon) //end of declaration or definition
//float4 illumDiffuse;
{
lexers.Dequeue(); //skip Semicolon
variable.Parent = parent;
parent.Children.Add(variable);
return;
}
//
next = lexers.Peek();
switch (next.Token)
{
case LexerTokens.Punctuation:
// ==== examples ==== //
//int foo(InputT input, ...) { }
var fdn = new FunctionDeclarationNode {
Parent = parent,
VarDeclaration = variable
};
parent.Children.Add(fdn);
DelimitedBy(lexers, DelimeterParams.Function, fdn.Vars,
lex => {
//var v = VarDeclarationParse(lex);
var v = VarDeclarationWithSemanticNamesParse(lex, parent);
lex.ThrowIfAny();
return(v);
});
using (semantic.RegisterFunction(variable.DeclarationName.NameLex, fdn)) {
//maybe have semantic name
var semanticNameMaybe = lexers.Peek();
if (semanticNameMaybe.Token == LexerTokens.Operator && semanticNameMaybe.Value == ":")
{
lexers.Dequeue(); //skip operator
fdn.SemanticNameLex = lexers.Dequeue();
}
var boundary = DelimitedBy(lexers, DelimeterParams.Sequences, fdn.Children,
lex => FunctionParse(lex, fdn));
fdn.Boundary = boundary;
}
return;
case LexerTokens.Operator:
parent.Children.Add(AssignmentParse(lexers, new AssignmentVariableDefinition()
{
Left = variable
}));
break;
}
}
public void Visit(CBufferNode definitionObjectNode)
{
}