Will Hawkins
989c9b1212
Refactor into four major components: 1. Common: Things shared among all other components. 2. Lang: P4-language-related components. 3. Runtime: Components required to run a P4 program. 4. Parser: Components for parsing a P4 program from source. Other components: 1. Macros 2. Tests 3. TreeSitterExtensions: Extra tree sitter functionality Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
51 lines
1.6 KiB
Swift
51 lines
1.6 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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//
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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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import Common
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import Lang
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extension ParserTransitionStatement: EvaluatableParserTransitionStatement {
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// TODO: Currently transitions to accept.
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func transition(execution: ProgramExecution) -> (ParserState, ProgramExecution) {
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return (accept, execution)
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}
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}
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extension ParserState: EvaluatableParserState {
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public func evaluate(execution: ProgramExecution) -> (ParserState, ProgramExecution) {
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var currentExecution = execution
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// First, evaluate the local elements.
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for local_element in local_elements {
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currentExecution = local_element.evaluate(execution: currentExecution)
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}
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// Then, evaluate the statements.
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for statement in statements {
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currentExecution = statement.evaluate(execution: currentExecution)
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}
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return if let transition = transition {
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transition.transition(execution: currentExecution)
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} else {
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(reject, currentExecution)
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}
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}
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}
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