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1d961ba22d
Although I don't plan to bring over new assertions wholesale into the current qualification branch, it's entirely possible that various minor changes in main will use the new assertions; having this basic support in the release branch will simplify that. (This is why I'm adding the includes as a separate pass from rewriting the individual assertions)
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
//===--- ParseRegex.cpp - Regular expression literal parsing --------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2021 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Regular expression literal parsing
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//
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//===----------------------------------------------------------------------===//
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#include "swift/AST/DiagnosticsParse.h"
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#include "swift/Basic/Assertions.h"
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#include "swift/Bridging/ASTGen.h"
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#include "swift/Parse/Parser.h"
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using namespace swift;
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ParserResult<Expr> Parser::parseExprRegexLiteral() {
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assert(Tok.is(tok::regex_literal));
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#if SWIFT_BUILD_REGEX_PARSER_IN_COMPILER
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auto regexText = Tok.getText();
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// Let the Swift library parse the contents, returning an error, or null if
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// successful.
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size_t version = 0;
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auto capturesBuf = Context.AllocateUninitialized<uint8_t>(
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RegexLiteralExpr::getCaptureStructureSerializationAllocationSize(
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regexText.size()));
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bool hadError = swift_ASTGen_parseRegexLiteral(
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regexText,
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/*versionOut=*/&version,
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/*captureStructureOut=*/capturesBuf.data(),
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/*captureStructureSize=*/capturesBuf.size(),
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/*diagBaseLoc=*/Tok.getLoc(), &Diags);
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auto loc = consumeToken();
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SourceMgr.recordRegexLiteralStartLoc(loc);
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if (hadError) {
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return makeParserResult(new (Context) ErrorExpr(loc));
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}
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assert(version >= 1);
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return makeParserResult(RegexLiteralExpr::createParsed(
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Context, loc, regexText, version, capturesBuf));
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#else
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llvm_unreachable("Lexer should not emit tok::regex_literal");
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#endif
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}
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