Will Hawkins
76 lines
2.4 KiB
Swift
76 lines
2.4 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/>.
|
|
|
|
import Common
|
|
import P4Lang
|
|
import P4Runtime
|
|
import SwiftTreeSitter
|
|
import TreeSitterExtensions
|
|
import TreeSitterP4
|
|
|
|
public struct Program {
|
|
public static func Parse(_ source: String) -> Result<P4Lang.Program> {
|
|
let p = SwiftTreeSitter.Parser.init()
|
|
|
|
do {
|
|
try p.setLanguage(p4lang)
|
|
} catch {
|
|
return Result.Error(Error(withMessage: "Could not configure the P4 parser"))
|
|
}
|
|
|
|
let result = p.parse(source)
|
|
guard let tree = result,
|
|
!tree.isError(lang: p4lang),
|
|
!tree.containsMissing(lang: p4lang)
|
|
else {
|
|
return Result.Error(Error(withMessage: "Could not compile the P4 program"))
|
|
}
|
|
|
|
guard
|
|
let parser_declaration_query = try? SwiftTreeSitter.Query(
|
|
language: p4lang,
|
|
data: String(
|
|
"(parserDeclaration (parserType parser_name: (identifier) @parser-name) (parserStates) @parser-states)"
|
|
).data(using: String.Encoding.utf8)!)
|
|
else {
|
|
return Result.Error(
|
|
Error(withMessage: "Could not compile the parser declaration tree sitter query"))
|
|
}
|
|
|
|
var program = P4Lang.Program()
|
|
|
|
// Set up a lexical scope for parsing.
|
|
var program_scope = LexicalScopes().enter()
|
|
|
|
let parser_qc = parser_declaration_query.execute(in: tree)
|
|
|
|
for parser_declaration in parser_qc {
|
|
switch Parser.Parse(
|
|
withName: Common.Identifier(name: parser_declaration.nodes[0].text!),
|
|
node: parser_declaration.nodes[1], inTree: tree, withLexicalScopes: program_scope)
|
|
{
|
|
case Result.Ok((let parser, let new_program_scope)):
|
|
program.types.append(parser)
|
|
program_scope = new_program_scope
|
|
case Result.Error(let error): return Result.Error(error)
|
|
}
|
|
}
|
|
|
|
return Result.Ok(program)
|
|
}
|
|
}
|