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compiler, runtime, common, testing: Support Directions on Parameters and Attributed Types

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Add support for directions on parameters and attributed types. The
latter is necessary to support the former, but is not limited to
the direction use case. An attributed type is a P4 type with attributes
(like its direction, whether it is read only, etc.) Other attributes
will be added in the future.

Changes necessary to support attributed types include:
1. Global instances tracked during compilation are not attributed
types and not simply types.
2. (future) Type checking will have to make sure that a types
attributes do not affect type compatibility.

Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
This commit is contained in:
Will Hawkins
2026-04-13 06:25:08 -04:00
parent 9669a99dfc
commit 35b2537754
17 changed files with 209 additions and 64 deletions
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Sources/Common/Compiler.swift
+2 -2
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@@ -16,10 +16,10 @@
// along with this program. If not, see <https://www.gnu.org/licenses/>.
/// A scope that resolves variable identifiers to their types.
public typealias VarTypeScope = Scope<P4Type>
public typealias VarTypeScope = Scope<P4TypeAttributed>
/// Scopes that resolve variable identifiers to their types.
public typealias VarTypeScopes = Scopes<P4Type>
public typealias VarTypeScopes = Scopes<P4TypeAttributed>
/// A scope that resolves type identifiers to their types.
public typealias TypeTypeScope = Scope<P4Type>