#### Functional changes
* Avoid unnecessary copies when a value binding is created from a value
expression in call parameters
* Ensure the result of the value expression bound is destroyed
* Provide storage to initializing expressions used in call parameters
---------
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
Right now we expect crashes on invalid parses, we just don't try to
handle it in general even though the long-term intent is we should
handle semantics for bad parses. However, in theory, we should be
correctly handling code that parses as valid and that's probably more
interesting to fix bugs for. So this starts trying to fuzz that space of
valid parses.
Fuzzer corpus is based on explorer tests, with one merge run.
This also makes the filename a reference to the buffer since the line
seems better to have as a reference (versus copying a string per error).
Most tests now have different line deltas due to the extra output, but
the actual errors should overall stay the same.
Some of the error locations look like they could be improved, but this
change is only making it clear where they were before.
At present, it looks like tools consume 3GB and fastbuild consumes 20GB
versus 23GB available. We've apparently been on the edge of this, and
are just now getting pushed over.
https://github.com/carbon-language/carbon-lang/actions/runs/5625169220/job/15243450729
shows what this looks like (review actions are run from trunk versions,
not this branch).
Add state (stack and heap information) to the trace stream only when
there is a change in state, this would prevent consecutive repetition of
state information in the trace output.
Checks it based on change in size of the stack and heap, added
`std::pair<int, int> stack_heap_sizes` in `Interpreter` to store size of
stack and heap for comparison.
Adds the following information about name resolution to the trace
output:
* Name resolution process
```
** resolving stmt | decl `<stmt | decl>` (<source_location>)
...
** finished resolving stmt | decl `<stmt | decl>` (<source_location>)
```
* When a name is added to the static scope
```
--- declared `<name>` as `<entity>` in `<scope>` (<source_location>)
```
* When a name is resolved
```
--- resolved `<name>` as `<result>` in `<scope>` (<source_location>)
```
* Marking a name declared/usable
```
--- marked `<name>` <usable | declared but not usable> in `<scope>`
```
The lack of comments makes it difficult to be sure, but if any of these
are necessary, I'd like to make sure there are comments to explain why a
specific value was shown (which I do add for diagnostics_ in this
change).
Handles tuples (including nested tuples) in the semantic phase of the
tool chain. Does not handle tuple element access yet.
---------
Co-authored-by: Farzana Ahmed Siddique <fasiddique@google.com>
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
This will be more correct if a user file is named prelude.carbon, and
reduces the explorer runtime by about 10% by removing a string
comparison from the check for whether trace output is enabled.
---------
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
Breaking apart namespaces from the main declaration list is, I think,
the most scalable approach to this. If we have more divergence in
supported declarations it gives a fairly straightforward way for
splitting, and roughly mirrors how class_body splits.
Fixes#2980
Prevent copies when initializing value expression from reference
expression. This is based on
https://github.com/carbon-language/carbon-lang/pull/2006, which
introduces expression categories, and how it is possible to convert
to/from those different categories. Continuation of
https://github.com/carbon-language/carbon-lang/pull/2907
## Functional changes
* Initializing a value expression from a reference expression takes its
value without a copy
* Reading from the value expression causes an error if the value changed
from the time it was initialized
* In this situation, prevents a copy both for variable definitions, and
call parameter bindings
## Main implementation changes
* Add new `ExpressionCategoryAction`, which evaluates an expression and
returns an `ExpressionValue` containing its category and address (if
any), in addition to the resulting `Value*`
* `ExpressionAction`s now invokes `ExpressionCategoryAction` and unwraps
the returned `ExpressionValue`
* `RuntimeScope::BindAndPin` method, and corresponding when attempting
to read a `value_node`.
## Next work
* Avoid unnecessary copies from value expression to value expression,
after ensuring that even value expression temporaries are registered for
destruction (https://github.com/Pixep/carbon-lang/pull/9)
This started with cleaning up the remaining Name/expression type punning
in the node stack, and grew. I'm factoring out a class because we've
previously expressed the desire to factor logic out of SemanticsContext
where possible, and this seemed like a reasonable cut.
NameExpression as the first node as a QualifiedExpression allows the
qualifier handling to consider Name in one less spot, an incremental
simplification. However, the additional complexity caused by this makes
me split ApplyNameQualifier/ApplyExpressionQualifier in order to avoid
repeat checks of the parse node's kind. The logic is still largely
shared, thus a couple helper functions. I think this is all fairly well
structured in the isolated class.
I can see that we may want to avoid passing SemanticsContext as an
argument in the future if it elides a step of lookup.
This adds a distinction between Unused and SoloParseNode, rather than
equating the two. This is intended to help identify nodes which are
getting pushed but maybe don't need to be.
Not totally done because I want to adjust declaration name handling due
to a quirk with how it mixes Name with Expression, but almost done. Once
that's done the type punning will be completely gone.
Adding `name` to `glob_lit_tests` will make it conform with other
implementations of `glob_lit_tests` out there. If someone uses this repo
while providing a different version of `glob_lit_tests` that requires a
name, those build rules will become invalid.
I think there's more we can do here, but this seemed like a good
checkpoint to make sure the path I'm going down is roughly what you
expected. There's one actual edit in if expression structure to match
the increased enforcement.
To filter based on file contexts, you can use `-trace_file_context=...`
flag along with `--trace_file=...` flag. These are the following options
you can pass to the `-trace_file_context=...` flag (you can also pass
them as list by separating them with comma).
1. `main`: Include trace output for file containing the main function.
2. `prelude`: Include trace output for prelude.
3. `import`: Include trace output for imports.
4. `include`: Include trace output for all.
If the flag isn't used or non of the options are passed, by default only
main file context is traced.
File contexts are distinguished based upon the source location by
passing the source location to `TraceStream::is_enabled(..)` as
arguments. If no arguments are passed, file context is
`FileContext::Unknown` and for now it will add the trace from unknown
file context.
Note: `import` option currently doesn't work as imports aren't supported
yet.
---------
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
This pr creates the object file for the carbon code that returns either
0 or 1. The command to convert the object code to binary is `clang
<object_file_name> -o <binary_name>`
---------
Co-authored-by: Farzana Ahmed Siddique <fasiddique@google.com>
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
Make the preamble of simple programs more ergonomic, by removing the
`package Main` from the main package and removing the `package`
declaration
entirely from the main source file. Imports within a single package no
longer
need to, and are not permitted to, specify the package name.
Partially covers #2001 / #1136.
Covers #1869.
Supersedes #2265.
Addresses design idea #2323.
---------
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
Co-authored-by: josh11b <josh11b@users.noreply.github.com>
This handles namespacing of functions. Parsing and semantics are changed
significantly, while lowering works without changes. Variables can't be
namespaced yet because they're dealing with patterns, and I didn't dig
through that code.
Most of the logic is done through the new name declaration stack, which
is necessary because semantics isn't quite sure where the declaration
name ends. It'd be complex for parsing to send a signal about this,
probably involving node variants and rewrites of the tree, and this
solution seems to work well. Unfortunately this means a new stack, but
that may be inevitable due to the extra information needing to be
tracked.
Note this doesn't deal with scoped lookups of non-namespace things,
which we'll need for generics. That'll probably involve pushing resolved
scopes onto a stack (or maybe just setting a singleton value?) to affect
contextual name lookup. But, I think the basics are there to make it
work when we can test the behavior.
This renames "designator expression" to "qualified expression" and adds
"qualified declaration" in order to use terminology more consistent with
C++.
Namespaces will probably need to be considered for name mangling down
the line, but this still uses the basic name.
Updated string_literals.md to mitigate confusion around newline behavior
in the context of block string literals.
Addresses #2887
---------
Co-authored-by: jonmeow <jperkins@google.com>
VSCode uses a `.vscode/launch.json` file for configuring the debugger.
This PR adds a line to the `.gitignore` file to also ignore it along
with the already-ignored `.vscode/settings.json` file.
---------
Co-authored-by: jonmeow <jperkins@google.com>
Trying to fix merge queue support for PRs that don't need tests, #2971
didn't work because it lacks the matrix configuration. This takes a
different approach from that, instead filtering each step based on
affected paths. This way we're also less likely to see skew in behavior.
For `-trace_phase` flag, makes the selection of multiple phases possible
by separating them by comma.
**Example Usage:**
```
bazel run //explorer -- <program_location> --trace_file=... -trace_phase=source_program,execution
```
## Description
For filtering the trace output, we currently pass flags like
`-trace_type_checking`, `-trace_execution` etc individually and these
can be passed in a combination.
This PR introduces `-trace_phase` flag that takes a list of the
following options:
- `name_resolution`: Include trace output for the name resolution phase.
- `control_flow_resolution`: Include trace output for the control flow
resolution phase.
- `type_checking`: Include trace output for the type checking phase.
- `unformed_variables_resolution`: Include trace output for the unformed
variables resolution phase.
- `declarations`: Include trace output for printing declarations.
- `execution`: Include trace output for program execution.
- `timing`: Include timing logs indicating the time taken by each phase.
- `all`: Include trace output for all phases.
### Example usage:
```
bazel run //explorer -- <program_location> --trace_file=... -trace_phase=type_checking,execution,declarations
```
- `xor` keyword is removed, with `^` used in its place.
- For consistency, also replaced unary `~` with unary `^`, as those
changes come from the same proposal.
- `type` keyword is added.
- To keep existing tests working, parsing support for `type` literal is
added too.
- `is` keyword is removed; we'd already added the `impls` keyword to the
list.
- Several other missing keywords added.
Reports an error (`value of generic binding T is not known`) instead of
performing an invalid cast when attempting to index into a tuple. Can
occur when trying to cast a generic constant in the interface position
of an implementation to `type`.
Closes#2938
Jon Ross-Perkins
josh11bandGeoff Romer
Adrien LeravatandJon Ross-Perkins
Farzana Ahmed SiddiqueandFarzana Ahmed Siddique
Prabhat Sachdeva
mx42
Richard SmithandJon Ross-Perkins
Jordan Rupprecht
T.J. Givenandjonmeow
Lucile Rose Nihlenandjonmeow
Chandler Carruth