public ASTNodeDeclFunct ParseDeclFunct(bool withBody)
{
var functNode = new ASTNodeDeclFunct();
functNode.SetSpan(this.Current().span);
this.Match(TokenKind.KeywordFn, "expected 'fn'");
functNode.SetNameNode(this.ParseName(false, false));
// Parse parameter list.
this.Match(TokenKind.ParenOpen, "expected '('");
while (this.CurrentIsNot(TokenKind.ParenClose))
{
var paramNode = new ASTNodeDeclFunctParam();
paramNode.SetNameNode(this.ParseName(false, true));
this.Match(TokenKind.Colon, "expected ':'");
paramNode.SetTypeNode(this.ParseType());
functNode.AddParameterNode(paramNode);
if (this.Current().kind == TokenKind.Comma)
{
this.Advance();
}
else if (this.Current().kind != TokenKind.ParenClose)
{
throw this.FatalAfterPrevious(MessageCode.Expected, "expected ',' or ')'");
}
}
this.Match(TokenKind.ParenClose, "expected ')'");
// Parse return type.
if (this.CurrentIs(TokenKind.Arrow))
{
this.Advance();
functNode.SetReturnTypeNode(this.ParseType());
}
// Parse body.
if (withBody)
{
functNode.SetBodyNode(this.ParseExprBlock());
}
return(functNode);
}
public void AddParameterNode(ASTNodeDeclFunctParam param)
{
param.SetParent(this);
this.AddSpan(param.GetSpan());
this.parameters.Add(param);
}