public bool ValueEquals(AddExpression other)
{
if (ReferenceEquals(null, other))
{
return(false);
}
if (ReferenceEquals(this, other))
{
return(true);
}
return(Left.ValueEquals(other.Left) && Right.ValueEquals(other.Right));
}
static Expression ParseStringExpression(Uno.Compiler.SourceFile file, string code)
{
if (string.IsNullOrEmpty(code))
{
return(null);
}
var parts = new List <Expression>();
int p = 0;
for (int i = 0; i < code.Length; i++)
{
if (code[i] == '{' && (i == 0 || code[i - 1] != '\\'))
{
if (i != p)
{
parts.Add(new StringLiteral(code.Substring(p, i - p)));
}
// Skip to end of binding expression
int start = i;
i++;
for (int scopes = 1; scopes > 0 && i < code.Length; i++)
{
if (code[i] == '}' && code[i - 1] != '\\')
{
scopes--;
}
if (code[i] == '{' && code[i - 1] != '\\')
{
scopes++;
}
}
var binding = code.Substring(start, i - start);
var be = Parse(new Uno.Compiler.SourceFile(file.FullPath, binding), binding, false);
if (be == null)
{
throw new Exception("Expected binding expression after '{'");
}
parts.Add(be);
p = i;
}
}
if (p < code.Length)
{
parts.Add(new StringLiteral(code.Substring(p, code.Length - p)));
}
return(parts.Count > 1
? AddExpression.Create(parts.ToArray())
: parts[0]);
}
Expression ParseExpression(Precedence p, bool vectorMode)
{
var e = ParseUnaryExpression(vectorMode);
while (e != null)
{
var op = Peek();
if (op == TokenType.Period)
{
Consume();
var id = Consume();
if (!IsIdentifier(id))
{
Error("Expected identifier after '.'");
}
e = new MemberExpression(e, id.Value);
continue;
}
if (op == TokenType.LeftSquareBrace)
{
Consume();
var index = ParseExpression(Precedence.Invalid, true);
if (Peek() != TokenType.RightSquareBrace)
{
Error("Expected ]");
}
Consume();
e = new LookUpExpression(e, index);
continue;
}
if (p < Precedence.Assignment)
{
if (TryConsume(TokenType.Colon))
{
e = new NameValuePairExpression(e, Expect(ParseExpression(Precedence.Assignment, false)));
continue;
}
}
if (p < Precedence.Conditional)
{
if (TryConsume(TokenType.QuestionMark))
{
var case1 = Expect(ParseExpression(Precedence.Conditional, false));
if (!TryConsume(TokenType.Colon))
{
Error("Expected ':'");
}
var case2 = Expect(ParseExpression(Precedence.Conditional, false));
e = new ConditionalExpression(e, case1, case2);
continue;
}
}
if (p < Precedence.Multiplicative)
{
if (TryConsume(TokenType.Mul))
{
e = new MultiplyExpression(e, Expect(ParseExpression(Precedence.Multiplicative, false)));
continue;
}
if (TryConsume(TokenType.Div))
{
e = new DivideExpression(e, Expect(ParseExpression(Precedence.Multiplicative, false)));
continue;
}
}
if (p < Precedence.Additive)
{
if (TryConsume(TokenType.Plus))
{
e = new AddExpression(e, Expect(ParseExpression(Precedence.Additive, false)));
continue;
}
if (TryConsume(TokenType.Minus))
{
e = new SubtractExpression(e, Expect(ParseExpression(Precedence.Additive, false)));
continue;
}
}
if (p < Precedence.LogicalAnd)
{
if (TryConsume(TokenType.LogAnd))
{
e = new LogicalAndExpression(e, Expect(ParseExpression(Precedence.LogicalAnd, false)));
continue;
}
}
if (p < Precedence.LogicalOr)
{
if (TryConsume(TokenType.LogOr))
{
e = new LogicalOrExpression(e, Expect(ParseExpression(Precedence.LogicalOr, false)));
continue;
}
}
if (p < Precedence.Relational)
{
if (TryConsume(TokenType.LessThan))
{
e = new LessThanExpression(e, Expect(ParseExpression(Precedence.Relational, false)));
continue;
}
if (TryConsume(TokenType.LessOrEqual))
{
e = new LessOrEqualExpression(e, Expect(ParseExpression(Precedence.Relational, false)));
continue;
}
if (TryConsume(TokenType.GreaterThan))
{
e = new GreaterThanExpression(e, Expect(ParseExpression(Precedence.Relational, false)));
continue;
}
if (TryConsume(TokenType.GreaterOrEqual))
{
e = new GreaterOrEqualExpression(e, Expect(ParseExpression(Precedence.Relational, false)));
continue;
}
if (TryConsume(TokenType.NotEqual))
{
e = new NotEqualExpression(e, Expect(ParseExpression(Precedence.Relational, false)));
continue;
}
if (TryConsume(TokenType.Equal))
{
e = new EqualExpression(e, Expect(ParseExpression(Precedence.Relational, false)));
continue;
}
}
if (p < Precedence.NullCoalescing)
{
if (TryConsume(TokenType.DoubleQuestionMark))
{
e = new NullCoalesceExpression(e, Expect(ParseExpression(Precedence.NullCoalescing, false)));
}
}
// Vector op
if (vectorMode && p == Precedence.Invalid && Peek() == TokenType.Comma)
{
var comps = new List <Expression>();
comps.Add(e);
while (TryConsume(TokenType.Comma))
{
e = Expect(ParseExpression(Precedence.Invalid, false));
comps.Add(e);
}
e = new VectorExpression(comps.ToArray()).TryFold();
}
break;
}
return(e);
}
