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https://github.com/carbon-language/carbon-lang.git
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pk19604014andGeoff Romer
2017eb4da0
* Initial implementation of block string literals following lexical_conventions/string_literals.md. Enabled yyinput() in flex to implement parsing. Added ParseBlockStringLiteral() helper to handler further transformations such as indenting. Modified formar_grammar to support single-quoted strings to prevent a failure on lexer.lpp. * Fixed _find_string_end quote parameter type int -> str. * Update executable_semantics/syntax/BUILD Co-authored-by: Geoff Romer <gromer@google.com> * Addressed code review comments - split table-drived test into individual tests, renamed constants to match style guide. * Addressed code review comments -- using EXPECT_THAT_EXPECTED() in tests, lexer comments and code cleanup. Co-authored-by: Geoff Romer <gromer@google.com>
32 lines
992 B
C++
32 lines
992 B
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef COMMON_STRING_HELPERS_H_
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#define COMMON_STRING_HELPERS_H_
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#include <optional>
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#include <string>
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/Error.h"
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namespace Carbon {
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// Note llvm StringExtras has significant functionality which is intended to be
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// complementary to this.
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// Unescapes Carbon escape sequences in the source string. Returns std::nullopt
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// on bad input. `is_block_string` enables escaping unique to block string
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// literals, such as \<newline>.
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auto UnescapeStringLiteral(llvm::StringRef source, bool is_block_string = false)
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-> std::optional<std::string>;
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// Parses a block string literal in `source`.
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auto ParseBlockStringLiteral(llvm::StringRef source)
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-> llvm::Expected<std::string>;
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} // namespace Carbon
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#endif // COMMON_STRING_HELPERS_H_
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