Will Hawkins
72 lines
2.4 KiB
Swift
72 lines
2.4 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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public struct CSTVisitorDriver {
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public init() {}
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public func visit<T>(
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expression: any CST.AnExpression, visitor: any CSTVisitor<T>, context: T
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) -> Result<T> {
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return switch expression {
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case let e as CST.BinaryOperatorExpression:
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visitor.visit(node: e, driver: self, context: context)
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case let e as CST.Literal: visitor.visit(node: e, driver: self, context: context)
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default: .Error(Error(withMessage: "AST Expression Element Is Not Visitable"))
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}
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}
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public func visit<T>(
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state: any CST.AnState, visitor: any CSTVisitor<T>, context: T
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) -> Result<T> {
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return switch state {
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case let s as CST.ParserStateDirectTransition:
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visitor.visit(node: s, driver: self, context: context)
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case let s as CST.ParserStateNoTransition:
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visitor.visit(node: s, driver: self, context: context)
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case let s as CST.ParserStateSelectTransition:
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visitor.visit(node: s, driver: self, context: context)
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default: .Error(Error(withMessage: "AST State Element (\(state)) Is Not Visitable"))
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}
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}
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public func visit<T>(
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statement: any CST.Statement, visitor: any CSTVisitor<T>, context: T
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) -> Result<T> {
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return switch statement {
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case let s as CST.Parser: visitor.visit(node: s, driver: self, context: context)
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default: .Error(Error(withMessage: "AST Statement Element Is Not Visitable"))
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}
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}
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public func visit<T>(
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program: CST.Program, visitor: any CSTVisitor<T>, context: T
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) -> Result<T> {
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var context = context
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for s in program.statements.statements {
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switch visit(statement: s, visitor: visitor, context: context) {
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case .Ok(let c): context = c
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case .Error(let e): return .Error(e)
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}
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}
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return .Ok(context)
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}
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}
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