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compiler: Flesh Out CST Visitor Framework

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As a use case, use it to implement text serialization
of the CST.

Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
This commit is contained in:
Will Hawkins
2026-06-15 23:37:04 -04:00
parent d22776b018
commit aa12974dd6
5 changed files with 277 additions and 31 deletions
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Sources/P4Parser/Protocols.swift
+18 -1
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@@ -58,11 +58,28 @@ public protocol ParsableStatement {
public protocol CSTVisitor<T> {
associatedtype T
// Declarations
func visit(node: CST.Control, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.ExternDeclaration, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.FunctionDeclaration, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.StructDeclaration, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.Parser, driver: CSTVisitorDriver, context: T) -> Result<T>
// Statements
func visit(node: CST.Statements, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.VariableDeclarationStatement, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.ExpressionStatement, driver: CSTVisitorDriver, context: T) -> Result<T>
// Expressions
func visit(node: CST.KeysetExpression, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.SelectCaseExpression, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.SelectExpression, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.BinaryOperatorExpression, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.Literal, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.Identifier, driver: CSTVisitorDriver, context: T) -> Result<T>
func visit(node: CST.Parser, driver: CSTVisitorDriver, context: T) -> Result<T>
// Parser
func visit(
node: CST.ParserStateDirectTransition, driver: CSTVisitorDriver, context: T
) -> Result<T>