Will Hawkins
5cfe5532a2
Now that the old P4Type is a P4QualifiedType, it makes sense to rename the data type back to just type. Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
80 lines
2.9 KiB
Swift
80 lines
2.9 KiB
Swift
// p4rse, Copyright 2026, Will Hawkins
|
|
//
|
|
// This file is part of p4rse.
|
|
//
|
|
// This file is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
public protocol EvaluatableExpression {
|
|
/// Evaluate an expression for a given execution
|
|
/// - Parameters
|
|
/// - execution: The execution context in which to evaluate the expression
|
|
/// - Returns: The value of expression
|
|
func evaluate(execution: ProgramExecution) -> (Result<P4Value>, ProgramExecution)
|
|
func type() -> P4QualifiedType
|
|
}
|
|
|
|
public protocol EvaluatableStatement {
|
|
/// Evaluate a statement for a given execution
|
|
/// - Parameters
|
|
/// - execution: The execution context in which to evaluate the parser statement
|
|
/// - Returns: A tuple of
|
|
/// 1. Whether this statement affects control flow.
|
|
/// 2. An updated execution after evaluating the parser statement
|
|
func evaluate(execution: ProgramExecution) -> (ControlFlow, ProgramExecution)
|
|
}
|
|
|
|
public protocol P4Type: CustomStringConvertible {
|
|
func eq(rhs: any P4Type) -> Bool
|
|
func def() -> P4DataValue
|
|
}
|
|
|
|
public protocol P4DataValue: CustomStringConvertible {
|
|
func type() -> any P4Type
|
|
func eq(rhs: P4DataValue) -> Bool
|
|
func lt(rhs: P4DataValue) -> Bool
|
|
func lte(rhs: P4DataValue) -> Bool
|
|
func gt(rhs: P4DataValue) -> Bool
|
|
func gte(rhs: P4DataValue) -> Bool
|
|
}
|
|
|
|
public protocol EvaluatableLValueExpression: EvaluatableExpression {
|
|
func set(
|
|
to: P4Value, inScopes scopes: VarValueScopes, duringExecution execution: ProgramExecution
|
|
) -> Result<(VarValueScopes, P4Value)>
|
|
func check(to: EvaluatableExpression, inScopes scopes: VarTypeScopes) -> Result<()>
|
|
}
|
|
|
|
public protocol ProgramExecutionEvaluator {
|
|
func ExecuteStatements(
|
|
_ statements: [EvaluatableStatement], inExecution execution: ProgramExecution,
|
|
_ handler: ExecuteStatementResultHandlerT?
|
|
) -> (ControlFlow, ProgramExecution)
|
|
|
|
func ExecuteStatements(
|
|
_ statements: [EvaluatableStatement], inExecution execution: ProgramExecution
|
|
) -> (ControlFlow, ProgramExecution)
|
|
|
|
func EvaluateExpression(
|
|
_ expression: EvaluatableExpression, inExecution execution: ProgramExecution,
|
|
) -> (Result<P4Value>, ProgramExecution)
|
|
}
|
|
|
|
extension ProgramExecutionEvaluator {
|
|
public func ExecuteStatements(
|
|
_ statements: [EvaluatableStatement], inExecution execution: ProgramExecution
|
|
) -> (ControlFlow, ProgramExecution) {
|
|
return ExecuteStatements(statements, inExecution: execution, .none)
|
|
}
|
|
}
|