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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
This commit is contained in:
Reid Spencer
2006-08-18 08:43:06 +00:00
parent fd90dd5d55
commit 61c83e023f
14 changed files with 4817 additions and 3344 deletions
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52
include/llvm/Assembly/Parser.h
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@@ -19,30 +19,45 @@
namespace llvm {
class Module;
class ParseException;
class ParseError;
// The useful interface defined by this file... Parse an ascii file, and return
// the internal representation in a nice slice'n'dice'able representation. Note
// that this does not verify that the generated LLVM is valid, so you should run
// the verifier after parsing the file to check that it's ok.
//
Module *ParseAssemblyFile(const std::string &Filename);// throw (ParseException)
Module *ParseAssemblyString(const char * AsmString, Module * M);// throw (ParseException)
/// This function is the main interface to the LLVM Assembly Parse. It parses
/// an ascii file that (presumably) contains LLVM Assembly code. It returns a
/// Module (intermediate representation) with the corresponding features. Note
/// that this does not verify that the generated Module is valid, so you should
/// run the verifier after parsing the file to check that it is okay.
/// @brief Parse LLVM Assembly from a file
Module *ParseAssemblyFile(
const std::string &Filename, ///< The name of the file to parse
ParseError* Error = 0 ///< If not null, an object to return errors in.
);
/// The function is a secondary interface to the LLVM Assembly Parse. It parses
/// an ascii string that (presumably) contains LLVM Assembly code. It returns a
/// Module (intermediate representation) with the corresponding features. Note
/// that this does not verify that the generated Module is valid, so you should
/// run the verifier after parsing the file to check that it is okay.
/// @brief Parse LLVM Assembly from a string
Module *ParseAssemblyString(
const char * AsmString, ///< The string containing assembly
Module * M, ///< A module to add the assembly too.
ParseError* Error = 0 ///< If not null, an object to return errors in.
);
//===------------------------------------------------------------------------===
// Helper Classes
//===------------------------------------------------------------------------===
// ParseException - For when an exceptional event is generated by the parser.
// This class lets you print out the exception message
//
class ParseException {
/// An instance of this class can be passed to ParseAssemblyFile or
/// ParseAssemblyString functions in order to capture error information from
/// the parser. It provides a standard way to print out the error message
/// including the file name and line number where the error occurred.
/// @brief An LLVM Assembly Parsing Error Object
class ParseError {
public:
ParseException(const std::string &filename, const std::string &message,
int LineNo = -1, int ColNo = -1);
ParseException(const ParseException &E);
ParseError() : Filename("unknown"), Message("none"), LineNo(0), ColumnNo(0) {}
ParseError(const ParseError &E);
// getMessage - Return the message passed in at construction time plus extra
// information extracted from the options used to parse with...
@@ -57,6 +72,9 @@ public:
return Filename;
}
void setError(const std::string &filename, const std::string &message,
int LineNo = -1, int ColNo = -1);
// getErrorLocation - Return the line and column number of the error in the
// input source file. The source filename can be derived from the
// ParserOptions in effect. If positional information is not applicable,
@@ -71,7 +89,7 @@ private :
std::string Message;
int LineNo, ColumnNo; // -1 if not relevant
ParseException &operator=(const ParseException &E); // objects by reference
ParseError &operator=(const ParseError &E); // objects by reference
};
} // End llvm namespace