308571074c
This is an artifact from merging MLIR into LLVM, the file headers are now aligned with the rest of the project.
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
//===- Lexer.h - MLIR Lexer Interface ---------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the MLIR Lexer class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MLIR_LIB_PARSER_LEXER_H
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#define MLIR_LIB_PARSER_LEXER_H
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#include "Token.h"
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#include "mlir/Parser.h"
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namespace mlir {
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class Location;
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/// This class breaks up the current file into a token stream.
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class Lexer {
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public:
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explicit Lexer(const llvm::SourceMgr &sourceMgr, MLIRContext *context);
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const llvm::SourceMgr &getSourceMgr() { return sourceMgr; }
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Token lexToken();
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/// Encode the specified source location information into a Location object
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/// for attachment to the IR or error reporting.
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Location getEncodedSourceLocation(llvm::SMLoc loc);
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/// Change the position of the lexer cursor. The next token we lex will start
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/// at the designated point in the input.
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void resetPointer(const char *newPointer) { curPtr = newPointer; }
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/// Returns the start of the buffer.
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const char *getBufferBegin() { return curBuffer.data(); }
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private:
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// Helpers.
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Token formToken(Token::Kind kind, const char *tokStart) {
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return Token(kind, StringRef(tokStart, curPtr - tokStart));
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}
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Token emitError(const char *loc, const Twine &message);
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// Lexer implementation methods.
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Token lexAtIdentifier(const char *tokStart);
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Token lexBareIdentifierOrKeyword(const char *tokStart);
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Token lexEllipsis(const char *tokStart);
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Token lexNumber(const char *tokStart);
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Token lexPrefixedIdentifier(const char *tokStart);
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Token lexString(const char *tokStart);
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/// Skip a comment line, starting with a '//'.
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void skipComment();
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const llvm::SourceMgr &sourceMgr;
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MLIRContext *context;
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StringRef curBuffer;
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const char *curPtr;
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Lexer(const Lexer &) = delete;
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void operator=(const Lexer &) = delete;
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};
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} // end namespace mlir
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#endif // MLIR_LIB_PARSER_LEXER_H
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