Will Hawkins
1203c0c90a
1. Parsing of P4 Parsers was broken: Multiple local elements and statements were not allowed. 2. Support more functionality on scopes. 3. Refactor variable/identifier. 4. Add more tests. Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
57 lines
2.0 KiB
Swift
57 lines
2.0 KiB
Swift
// p4rse, Copyright 2026, Will Hawkins
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//
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// This file is part of p4rse.
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// This file is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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public class ProgramExecution: CustomStringConvertible {
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public var scopes: Scopes = Scopes()
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public init() {}
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public var description: String {
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return "Runtime:\nScopes: \(scopes)"
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}
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}
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//public struct ParserRuntime: ProgramRuntime {
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public class ParserRuntime: CustomStringConvertible {
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var execution: ParserExecution
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init(execution: ParserExecution) {
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self.execution = execution
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}
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public static func create(program: P4.Parser) -> Result<ParserRuntime> {
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// First, find the start state.
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guard let start_state = program.findStartState() else {
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return Result.Error(Error(withMessage: "Could not find the start state"))
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}
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return Result.Ok(P4.ParserRuntime(execution: P4.ParserExecution(start_state)))
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}
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public func run(input: P4.Packet) -> Result<ParserExecution> {
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execution.scopes.enter()
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while execution.state != P4.accept && execution.state != P4.reject {
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execution = execution.state.evaluate(execution: execution)
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}
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return .Ok(execution)
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}
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public var description: String {
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//return "\(super.description)\nState: \(execution?.description ?? "N/A")\nError: \(error?.description ?? "None")"
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return "Runtime:\nExecution: \(execution)"
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}
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}
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