forked from OSchip/llvm-project
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
//===- Lexer.h - MLIR Lexer Interface ---------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares the MLIR Lexer class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef MLIR_LIB_PARSER_LEXER_H
|
|
#define MLIR_LIB_PARSER_LEXER_H
|
|
|
|
#include "Token.h"
|
|
#include "mlir/Parser/Parser.h"
|
|
|
|
namespace mlir {
|
|
class Location;
|
|
|
|
/// This class breaks up the current file into a token stream.
|
|
class Lexer {
|
|
public:
|
|
explicit Lexer(const llvm::SourceMgr &sourceMgr, MLIRContext *context);
|
|
|
|
const llvm::SourceMgr &getSourceMgr() { return sourceMgr; }
|
|
|
|
Token lexToken();
|
|
|
|
/// Encode the specified source location information into a Location object
|
|
/// for attachment to the IR or error reporting.
|
|
Location getEncodedSourceLocation(SMLoc loc);
|
|
|
|
/// Change the position of the lexer cursor. The next token we lex will start
|
|
/// at the designated point in the input.
|
|
void resetPointer(const char *newPointer) { curPtr = newPointer; }
|
|
|
|
/// Returns the start of the buffer.
|
|
const char *getBufferBegin() { return curBuffer.data(); }
|
|
|
|
private:
|
|
// Helpers.
|
|
Token formToken(Token::Kind kind, const char *tokStart) {
|
|
return Token(kind, StringRef(tokStart, curPtr - tokStart));
|
|
}
|
|
|
|
Token emitError(const char *loc, const Twine &message);
|
|
|
|
// Lexer implementation methods.
|
|
Token lexAtIdentifier(const char *tokStart);
|
|
Token lexBareIdentifierOrKeyword(const char *tokStart);
|
|
Token lexEllipsis(const char *tokStart);
|
|
Token lexNumber(const char *tokStart);
|
|
Token lexPrefixedIdentifier(const char *tokStart);
|
|
Token lexString(const char *tokStart);
|
|
|
|
/// Skip a comment line, starting with a '//'.
|
|
void skipComment();
|
|
|
|
const llvm::SourceMgr &sourceMgr;
|
|
MLIRContext *context;
|
|
|
|
StringRef curBuffer;
|
|
const char *curPtr;
|
|
|
|
Lexer(const Lexer &) = delete;
|
|
void operator=(const Lexer &) = delete;
|
|
};
|
|
|
|
} // namespace mlir
|
|
|
|
#endif // MLIR_LIB_PARSER_LEXER_H
|