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10 Commits
Author SHA1 Message Date
Prabhat SachdevaandJon Ross-Perkins 289d05813e Explorer: Remove PrintDepth and implement PrintIndent. (#3113) 
This PR removes `PrintDepth` from statement and declaration.
Implements `PrintIndent` for better indented formatting along with
various changes to make printing of statements and declarations better.

---------

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
 2023-08-25 17:17:39 +00:00
Jon Ross-Perkins 357baaeef8 Rename //explorer/common to base (#3103) 
Renaming per #3100
 2023-08-15 19:23:23 +00:00
Jon Ross-Perkins 39155d34ae Remove experimental continuation support (#2776) 
Removes `__continuation`, `__await`, and `__run`.

In part here, the discussion was that while the feature had been useful for validating the early explorer design, it's no longer needed for that role as the explorer is now quite robust. Continuations have been experimental and, at this point, don't have an owner pushing to a proposal.

The triggering factor is that, as we push to address fuzzer issues, I ran into a crash bug in this code; basically, `fn Main() -> i32 { __await; return 0; }`. When I mentioned this, the reaction seemed to trend towards removal of the feature.
 2023-04-19 14:22:43 -07:00
Richard Smith 782bd87316 AST cloning mechanism (#2699) 
This is intended to be used for template instantiation, but for now takes no stance as to what it's cloning.

This is tested by parsing and cloning all of our test files, and checking that the result of converting each AST to proto is the same as the result of cloning and then converting each AST to proto.
 2023-03-21 12:36:05 -07:00
Richard Smith 2fd7e2b65d Add support for compound assignment and increment (#2526) 
Add support for user-defined assignment, as well as compound assignment and increment, following the design direction in pending proposal #2511.

Some of this isn't fully testable yet: because explorer doesn't properly support `impl` specialization, the blanket `impl`s in the prelude prevent types from customizing assignment.
 2023-01-20 18:48:13 -08:00
Jon Ross-Perkins 8e5dcc2588 Enable readability-qualified-auto (#2314) 
As suggested on #2310
 2022-10-18 19:21:49 -07:00
pmqttm newGeoff RomerRichard Smith
 		f754373786 For loop for arrays (#1753) 
Co-authored-by: m new <michael.burzan@outlook.de>
Co-authored-by: Geoff Romer <gromer@google.com>
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
 2022-08-09 15:34:24 -07:00
Zenong ZhangandJon Ross-Perkins 52ee050019 Initial implementation of unformed state for local variables. (#1387) 
Allows unformed state for local variables. Reports a run-time error when an unformed local variable is used.
- Added declaration without initialization for local variables in the parser.
- Made the init expression of VariableDefinition optional.
- Expanded (alive, dead) to (uninitialized, alive, dead) in the Heap.

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
 2022-07-20 16:03:52 -04:00
SlaterLatiao 9106e9239e Initial implementation of returned var. (#1348) 
This PR implements the `returned var` for the explorer.
- Enabled `returned var` and `return var` syntax in lexer and parser.
- Split `Return` statement into `ReturnVar` and `ReturnExpression` to distinguish the two types of returns.
- Added logic in name resolution, type checking and interpretation to process `returned var` definition and `ReturnVar` statement.
 2022-07-06 13:35:41 -07:00
Jon Meow 309ec35f95 Rename executable_semantics to explorer (#1188) 
Change generated with:

```
#!/usr/bin/bash -eux

# Helper script for renaming pending work.
# Run from the repo root.

# Rename executable_semantics in code.
sed -i 's/executable_semantics/explorer/g' \
  $(git grep -l 'executable_semantics' . | grep -v proposals)
sed -i 's/executable semantics/explorer/g' \
  $(git grep -l 'executable semantics' . | grep -v proposals)
sed -i 's/Executable semantics/Explorer/g' \
  $(git grep -l 'Executable semantics' . |  grep -v proposals)
sed -i 's/Executable Semantics/Explorer/g' \
  $(git grep -l 'Executable Semantics' . |  grep -v proposals)
sed -i 's/EXECUTABLE_SEMANTICS/EXPLORER/g' \
  $(git grep -l 'EXECUTABLE_SEMANTICS' . | grep -v proposals)
sed -i 's/ExecutableSemantics/Explorer/g' \
  $(git grep -l 'ExecutableSemantics' . | grep -v proposals)
sed -i 's/executable-semantics/explorer/g' \
  $(git grep -l 'executable-semantics' . | grep -v proposals)

# This is only needed for the initial move.
mv executable_semantics explorer
mv explorer/fuzzing/executable_semantics_fuzzer.cpp explorer/fuzzing/explorer_fuzzer.cpp
```

Verified with `bazel test ...`
 2022-04-29 13:20:25 -07:00