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aa8a5f174d
* Replaced std::exit() with return llvm::Expected/llvm::Error<T> for expected errors like invalid syntax. * Use llvm::formatv() for formatting lexer error messages. x * Addresed merge errors. * Fixed impl scope. * Made ErrorBuilder::operator<< nodiscard, to catch code forgetting 'return' in 'return FATAL_COMPILATION_ERROR()'. * FatalComplationError() -> ParseAndLexContext::RecordLexerError(). Other usages of ERROR_TOKEN in lexer.lpp were actually supposed to be END_OF_FILE. * Update executable_semantics/syntax/parse_and_lex_context.h Co-authored-by: Jon Meow <jperkins@google.com> * Code review fixes. * Update executable_semantics/syntax/parser.ypp Co-authored-by: Jon Meow <jperkins@google.com> * More code review fixes. * Update executable_semantics/interpreter/type_checker.h Co-authored-by: Jon Meow <jperkins@google.com> * Yet more code review fixes... * Update executable_semantics/syntax/lexer.lpp Co-authored-by: Jon Meow <jperkins@google.com> * code review comments * Update executable_semantics/interpreter/interpreter.cpp Co-authored-by: Geoff Romer <gromer@google.com> * Apply suggestions from code review Co-authored-by: Jon Meow <jperkins@google.com> * Update executable_semantics/syntax/lexer.lpp Co-authored-by: Jon Meow <jperkins@google.com> * code review * code review * Apply suggestions from code review Co-authored-by: Jon Meow <jperkins@google.com> * formatted code * review comments * Switched to the new ErrorOr<V> error implementation * code review comments * fixed comment * restored ostream.h as #976 makes the change unnecesary * review comments Co-authored-by: Jon Meow <jperkins@google.com> Co-authored-by: Geoff Romer <gromer@google.com>
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
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 EXECUTABLE_SEMANTICS_SYNTAX_DRIVER_H_
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#define EXECUTABLE_SEMANTICS_SYNTAX_DRIVER_H_
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#include <variant>
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#include "executable_semantics/ast/ast.h"
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#include "executable_semantics/syntax/parser.h" // from parser.ypp
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namespace Carbon {
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// The state and functionality that is threaded "globally" through the
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// lexing/parsing process.
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class ParseAndLexContext {
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public:
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// Creates an instance analyzing the given input file.
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ParseAndLexContext(Nonnull<const std::string*> input_file_name, bool trace)
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: input_file_name_(input_file_name), trace_(trace) {}
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// Formats ands records a lexer error. Returns an error token as a
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// convenience.
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auto RecordSyntaxError(const std::string& message,
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bool prefix_with_newline = false)
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-> Parser::symbol_type;
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auto source_loc() const -> SourceLocation {
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return SourceLocation(input_file_name_,
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static_cast<int>(current_token_position.begin.line));
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}
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auto trace() const -> bool { return trace_; }
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// The source range of the token being (or just) lex'd.
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location current_token_position;
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auto error_messages() const -> const std::vector<std::string> {
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return error_messages_;
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}
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private:
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// A path to the file processed, relative to the current working directory
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// when *this is called.
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Nonnull<const std::string*> input_file_name_;
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bool trace_;
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std::vector<std::string> error_messages_;
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};
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} // namespace Carbon
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// Gives flex the yylex prototype we want.
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#define YY_DECL \
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auto yylex(Carbon::Nonnull<Carbon::Arena*> arena, yyscan_t yyscanner, \
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Carbon::ParseAndLexContext& context) \
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->Carbon::Parser::symbol_type
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// Declares yylex for the parser's sake.
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YY_DECL;
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#endif // EXECUTABLE_SYNTAX_DRIVER_H_
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