public override Base VisitRange_clause([NotNull] GolangParser.Range_clauseContext context)
{
var expr = context.expression().Accept(this) as Expression;
ExpressionList values = null;
if (context.identifier_list() != null)
{
values = new ExpressionList();
var idents = context.identifier_list().Accept(this) as RawNodeList;
int index = 0;
foreach (var ident in idents.Items)
{
var vd = new VarDeclaration(
ident.Text,
new IteratorType(
new ExpressionType(expr),
index++));
m_currentScope.AddVarDeclaration(vd);
values.AddChild(new IdentifierExpression(vd.Identifier));
}
}
else if (context.expression_list() != null)
{
values = context.expression_list().Accept(this) as ExpressionList;
}
return(new RangeClause(
values,
expr));
}
public ExpressionList ParseExpressionList(TokenType expressionDelimiter,
TokenType expressionListTerminator = TokenType.None)
{
try {
trace.Enter();
ConsumedTokens.Clear();
Read();
if (current.Type == expressionListTerminator)
{
return(null);
}
var expr = new ExpressionList {
Delimiter = expressionDelimiter
};
expr.AddChild(Expr());
while (true)
{
if (current.Type == expressionDelimiter)
{
Read();
if (current.Type == TokenType.Eof ||
current.Type == expressionListTerminator)
{
break;
}
expr.AddChild(Expr());
}
else if (current.Type == TokenType.Eof ||
current.Type == expressionListTerminator)
{
break;
}
else
{
throw new SyntaxException(tokenizer, current, expressionDelimiter);
}
}
return(expr);
} finally {
trace.Leave();
}
}
public override Base VisitExpression_list([NotNull] GolangParser.Expression_listContext context)
{
var ret = new ExpressionList();
foreach (var child in context.children)
{
if (child is GolangParser.ExpressionContext)
{
ret.AddChild(child.Accept(this) as Expression);
}
}
return(ret);
}
public override Base VisitShort_var_decl([NotNull] GolangParser.Short_var_declContext context)
{
var ret = new StatementList();
var identList = context.identifier_list().Accept(this) as RawNodeList;
var exprList = context.expression_list().Accept(this) as ExpressionList;
if (identList.Items.Count > 1 && exprList.NumChildren() == 1 && exprList.GetChild(0) is InvocationExpression)
{
var invoke = exprList.GetChild <InvocationExpression>(0);
var idents = new ExpressionList();
int index = 0;
foreach (var ident in identList.Items)
{
idents.AddChild(new IdentifierExpression(ident.Text));
var vd = new VarDeclaration(ident.Text,
new ReturnType(
invoke,
index++));
m_currentScope.AddVarDeclaration(vd);
}
ret.AddChild(
new ReturnAssignment(
idents,
invoke));
}
else
{
for (int i = 0; i < identList.Items.Count; i++)
{
var vd = new VarDeclaration(identList.Items[i].Text, new ExpressionType(exprList.GetChild <Expression>(0)));
m_currentScope.AddVarDeclaration(vd);
ret.AddChild(
new Assignment(
new IdentifierExpression(vd.Identifier),
exprList.GetChild <Expression>(0),
AssignmentType.Normal));
}
}
return(ret);
}
