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58 lines
2.0 KiB
C++
58 lines
2.0 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/Parse/Parser.h"
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#include "swift/AST/DiagnosticsParse.h"
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#include "swift/Parse/ParsedSyntaxRecorder.h"
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#include "swift/Parse/SyntaxParsingContext.h"
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#include "swift/Syntax/SyntaxKind.h"
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// Regex parser delivered via libSwift
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#include "swift/Parse/ExperimentalRegexBridging.h"
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static RegexLiteralParsingFn regexLiteralParsingFn = nullptr;
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void Parser_registerRegexLiteralParsingFn(RegexLiteralParsingFn fn) {
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regexLiteralParsingFn = fn;
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}
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using namespace swift;
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using namespace swift::syntax;
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ParserResult<Expr> Parser::parseExprRegexLiteral() {
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assert(Tok.is(tok::regex_literal));
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assert(regexLiteralParsingFn);
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SyntaxParsingContext LocalContext(SyntaxContext,
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SyntaxKind::RegexLiteralExpr);
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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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// TODO: We need to be able to pass back a source location to emit the error
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// at.
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const char *errorStr = nullptr;
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unsigned version;
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regexLiteralParsingFn(regexText.str().c_str(), &errorStr, &version,
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/*captureStructureOut*/ nullptr,
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/*captureStructureSize*/ 0);
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if (errorStr)
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diagnose(Tok, diag::regex_literal_parsing_error, errorStr);
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auto loc = consumeToken();
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return makeParserResult(
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RegexLiteralExpr::createParsed(Context, loc, regexText, version));
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}
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