public Expression Parse(Parser parser, Token token, out bool trailingSemicolon)
{
trailingSemicolon = true;
if (parser.MatchAndTake(TokenType.LeftBrace))
{
var fields = ParseObjectDestructuring(parser);
parser.Take(TokenType.Assign);
return(new DestructuredObjectExpression(token, fields, parser.ParseExpression(), _isReadOnly));
}
if (parser.MatchAndTake(TokenType.LeftSquare))
{
var indices = ParseArrayDestructuring(parser);
parser.Take(TokenType.Assign);
return(new DestructuredArrayExpression(token, indices, parser.ParseExpression(), _isReadOnly));
}
var declarations = new List <VarExpression.Declaration>();
do
{
var identifier = parser.Take(TokenType.Identifier);
Expression initializer = null;
if (_isReadOnly || parser.Match(TokenType.Assign))
{
parser.Take(TokenType.Assign);
initializer = parser.ParseExpression();
}
var declaration = new VarExpression.Declaration(identifier.Contents, initializer);
declarations.Add(declaration);
} while (parser.MatchAndTake(TokenType.Comma));
return(new VarExpression(token, declarations, _isReadOnly));
}
public Expression Parse(Parser parser, Token token, out bool trailingSemicolon)
{
trailingSemicolon = true;
var declarations = new List <VarExpression.Declaration>();
do
{
var identifier = parser.Take(TokenType.Identifier);
Expression initializer = null;
if (parser.MatchAndTake(TokenType.Assign))
{
initializer = parser.ParseExpession();
}
var declaration = new VarExpression.Declaration(identifier.Contents, initializer);
declarations.Add(declaration);
} while (parser.MatchAndTake(TokenType.Comma));
return(new VarExpression(token, declarations, _isReadOnly));
}
