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61c83e023f
Rid the Assembly Parser of exceptions. This is a really gross hack but it will do until the Assembly Parser is re-written as a recursive descent. The basic premise is that wherever the old "ThrowException" function was called (new name: GenerateError) we set a flag (TriggerError). Every production checks that flag and calls YYERROR if it is set. Additionally, each call to ThrowException in the grammar is replaced with GEN_ERROR which calls GenerateError and then YYERROR immediately. This prevents the remaining production from continuing after an error condition. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29763 91177308-0d34-0410-b5e6-96231b3b80d8
98 lines
3.7 KiB
C++
98 lines
3.7 KiB
C++
//===-- llvm/Assembly/Parser.h - Parser for VM assembly files ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// These classes are implemented by the lib/AsmParser library.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ASSEMBLY_PARSER_H
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#define LLVM_ASSEMBLY_PARSER_H
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#include <string>
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namespace llvm {
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class Module;
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class ParseError;
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/// This function is the main interface to the LLVM Assembly Parse. It parses
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/// an ascii file that (presumably) contains LLVM Assembly code. It returns a
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/// Module (intermediate representation) with the corresponding features. Note
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/// that this does not verify that the generated Module is valid, so you should
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/// run the verifier after parsing the file to check that it is okay.
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/// @brief Parse LLVM Assembly from a file
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Module *ParseAssemblyFile(
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const std::string &Filename, ///< The name of the file to parse
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ParseError* Error = 0 ///< If not null, an object to return errors in.
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);
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/// The function is a secondary interface to the LLVM Assembly Parse. It parses
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/// an ascii string that (presumably) contains LLVM Assembly code. It returns a
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/// Module (intermediate representation) with the corresponding features. Note
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/// that this does not verify that the generated Module is valid, so you should
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/// run the verifier after parsing the file to check that it is okay.
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/// @brief Parse LLVM Assembly from a string
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Module *ParseAssemblyString(
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const char * AsmString, ///< The string containing assembly
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Module * M, ///< A module to add the assembly too.
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ParseError* Error = 0 ///< If not null, an object to return errors in.
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);
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//===------------------------------------------------------------------------===
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// Helper Classes
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//===------------------------------------------------------------------------===
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/// An instance of this class can be passed to ParseAssemblyFile or
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/// ParseAssemblyString functions in order to capture error information from
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/// the parser. It provides a standard way to print out the error message
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/// including the file name and line number where the error occurred.
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/// @brief An LLVM Assembly Parsing Error Object
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class ParseError {
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public:
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ParseError() : Filename("unknown"), Message("none"), LineNo(0), ColumnNo(0) {}
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ParseError(const ParseError &E);
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// getMessage - Return the message passed in at construction time plus extra
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// information extracted from the options used to parse with...
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//
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const std::string getMessage() const;
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inline const std::string &getRawMessage() const { // Just the raw message...
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return Message;
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}
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inline const std::string &getFilename() const {
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return Filename;
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}
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void setError(const std::string &filename, const std::string &message,
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int LineNo = -1, int ColNo = -1);
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// getErrorLocation - Return the line and column number of the error in the
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// input source file. The source filename can be derived from the
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// ParserOptions in effect. If positional information is not applicable,
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// these will return a value of -1.
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//
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inline const void getErrorLocation(int &Line, int &Column) const {
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Line = LineNo; Column = ColumnNo;
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}
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private :
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std::string Filename;
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std::string Message;
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int LineNo, ColumnNo; // -1 if not relevant
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ParseError &operator=(const ParseError &E); // objects by reference
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};
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} // End llvm namespace
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#endif
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