Support multiple steps in `PureExec`.

See merge request FP/iris-coq!179

Snapshot will re-appear in iris-examples eventually

Marianna Rapoport authored 6 years ago and Ralf Jung committed 6 years ago

- Removing admitted prophecy spec and making prophecy-related examples (coin-flip and atomic-pair-snapshot) work with the new prophecy support in heap_lang
- Adjusting heap_lang tactics for automation of substitution, closedness, etc. to support prophecy syntax
- Adding notation for prophecy syntax

Marianna Rapoport authored 6 years ago and Ralf Jung committed 6 years ago

- Removing head of list of observations after each reduction step in definition of wp
- Adding support for observations to state_interp and world
- Applying Ralf's suggestions to previous commit (e.g. replacing /\ and -> with unicode characters)

Marianna Rapoport authored 6 years ago and Ralf Jung committed 6 years ago

- Added my version of increment.v for practicing working with logically atomic triples
- Added implementation of coin-flip spec from Turon et al. (POPL'13) with an assumed spec for prophecy variables

`Cancelable` instances for all elements of option/gmap

See merge request FP/iris-coq!127