mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
//===--- ParseRegex.cpp - Regular expression literal parsing --------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2021 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Regular expression literal parsing
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "swift/Parse/Parser.h"
|
|
#include "swift/AST/DiagnosticsParse.h"
|
|
#include "swift/Parse/ParsedSyntaxRecorder.h"
|
|
#include "swift/Parse/SyntaxParsingContext.h"
|
|
#include "swift/Syntax/SyntaxKind.h"
|
|
|
|
// Regex parser delivered via Swift modules.
|
|
#include "swift/Parse/ExperimentalRegexBridging.h"
|
|
static RegexLiteralParsingFn regexLiteralParsingFn = nullptr;
|
|
void Parser_registerRegexLiteralParsingFn(RegexLiteralParsingFn fn) {
|
|
regexLiteralParsingFn = fn;
|
|
}
|
|
|
|
using namespace swift;
|
|
using namespace swift::syntax;
|
|
|
|
ParserResult<Expr> Parser::parseExprRegexLiteral() {
|
|
assert(Tok.is(tok::regex_literal));
|
|
assert(regexLiteralParsingFn);
|
|
|
|
SyntaxParsingContext LocalContext(SyntaxContext,
|
|
SyntaxKind::RegexLiteralExpr);
|
|
|
|
auto regexText = Tok.getText();
|
|
|
|
// Let the Swift library parse the contents, returning an error, or null if
|
|
// successful.
|
|
// TODO: We need to be able to pass back a source location to emit the error
|
|
// at.
|
|
const char *errorStr = nullptr;
|
|
unsigned version;
|
|
auto capturesBuf = Context.AllocateUninitialized<uint8_t>(
|
|
RegexLiteralExpr::getCaptureStructureSerializationAllocationSize(
|
|
regexText.size()));
|
|
regexLiteralParsingFn(regexText.str().c_str(), &errorStr, &version,
|
|
/*captureStructureOut*/ capturesBuf.data(),
|
|
/*captureStructureSize*/ capturesBuf.size());
|
|
if (errorStr) {
|
|
diagnose(Tok, diag::regex_literal_parsing_error, errorStr);
|
|
return makeParserError();
|
|
}
|
|
|
|
auto loc = consumeToken();
|
|
return makeParserResult(RegexLiteralExpr::createParsed(
|
|
Context, loc, regexText, version, capturesBuf));
|
|
}
|