This is a WIP fork of OpenQASM which aims to add a few additional features:

• specification of operators as linear combinations of other operators
• measurement of these operators supported directly in the grammar

Optional features to consider:

• declaring quantum channels in a similar way to quantum gates
• basic measurement post-processing like expval?
• remove the unnecessary restrictions on uppercase names
• support for complex numbers?
• support for gates & operators to be declared as matrices? (similar to quil)