private bool ParseStatement(TokenReader reader, out Statement result)
{
result = null;
Token tok = reader.Peek();
Token start = tok;
if (tok.Is(Keyword.SemiColon))
{
return true; // empty statement.
}
if (tok.Is(Keyword.If))
{
return this.ParseIfStatement(reader, out result);
}
if (tok.Is(Keyword.While))
{
return this.ParseWhileStatement(reader, out result);
}
if (tok.Is(Keyword.Delete))
{
return this.ParseDeleteStatement(reader, out result);
}
if (tok.Is(Keyword.Begin))
{
BlockStatement block = null;
bool success = this.ParseBlockStatement(reader, out block);
result = block;
return success;
}
ReferenceExpression lhs = null;
if (!this.ParseReferenceExpression(reader, out lhs))
{
return false;
}
tok = reader.Peek();
if (tok.Is(Keyword.Assign))
{
reader.Read();
Expression rhs = null;
if (!this.ParseExpression(reader, out rhs))
{
return false;
}
result = new AssignmentStatement(start, lhs, rhs);
return true;
}
else
{
result = new CallStatement(start, lhs);
return true;
}
}
private bool TryEmitCall(CallStatement callStatement, CompilerContext context, Scope scope, MethodImpl method)
{
TypeDefinition typeDef = null;
return this.TryEmitExpression(callStatement.Expression, context, scope, method, out typeDef);
}
