Pragma.cpp revision 636c5ef6572e899d36cec1b0023fb28ba65189e1
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- Pragma.cpp - Pragma registration and handling --------------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements the PragmaHandler/PragmaTable interfaces and implements 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// pragma related methods of the Preprocessor class. 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Pragma.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/HeaderSearch.h" 175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Preprocessor.h" 185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/Diagnostic.h" 195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/FileManager.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/SourceManager.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Out-of-line destructor to provide a home for the class. 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaHandler::~PragmaHandler() { 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// PragmaNamespace Implementation. 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaNamespace::~PragmaNamespace() { 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = Handlers.size(); i != e; ++i) 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete Handlers[i]; 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FindHandler - Check to see if there is already a handler for the 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// specified name. If not, return the handler for the null identifier if it 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// exists, otherwise return null. If IgnoreNull is true (the default) then 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// the null handler isn't returned on failure to match. 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaHandler *PragmaNamespace::FindHandler(const IdentifierInfo *Name, 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool IgnoreNull) const { 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *NullHandler = 0; 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = Handlers.size(); i != e; ++i) { 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Handlers[i]->getName() == Name) 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Handlers[i]; 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Handlers[i]->getName() == 0) 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer NullHandler = Handlers[i]; 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return IgnoreNull ? 0 : NullHandler; 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 544095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbarvoid PragmaNamespace::RemovePragmaHandler(PragmaHandler *Handler) { 554095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar for (unsigned i = 0, e = Handlers.size(); i != e; ++i) { 564095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (Handlers[i] == Handler) { 574095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar Handlers[i] = Handlers.back(); 584095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar Handlers.pop_back(); 594095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar return; 604095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 614095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 624095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(0 && "Handler not registered in this namespace"); 634095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar} 644095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 65d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid PragmaNamespace::HandlePragma(Preprocessor &PP, Token &Tok) { 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the 'namespace' that the directive is in, e.g. STDC. Do not macro 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // expand it, the user can have a STDC #define, that should not affect this. 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexUnexpandedToken(Tok); 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the handler for this token. If there is no handler, ignore the pragma. 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *Handler = FindHandler(Tok.getIdentifierInfo(), false); 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Handler == 0) return; 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, pass it down. 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Handler->HandlePragma(PP, Tok); 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Preprocessor Pragma Directive Handling. 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaDirective - The "#pragma" directive has been parsed. Lex the 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// rest of the pragma, passing it to the registered pragma handlers. 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::HandlePragmaDirective() { 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumPragma; 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Invoke the first level of pragma handlers which reads the namespace id. 88d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->HandlePragma(*this, Tok); 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the pragma handler didn't read the rest of the line, consume it now. 9268a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer->ParsingPreprocessorDirective) 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DiscardUntilEndOfDirective(); 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// return the first token after the directive. The _Pragma token has just 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// been read into 'Tok'. 99d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::Handle_Pragma(Token &Tok) { 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the pragma token location. 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation PragmaLoc = Tok.getLocation(); 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '('. 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1053692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::l_paren)) { 1063692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1073692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1083692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '"..."'. 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1123692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::string_literal) && Tok.isNot(tok::wide_string_literal)) { 1133692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1143692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1153692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the string. 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string StrVal = getSpelling(Tok); 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation StrLoc = Tok.getLocation(); 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the ')'. 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1233692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::r_paren)) { 1243692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1253692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1263692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The _Pragma is lexically sound. Destringize according to C99 6.10.9.1. 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[0] == 'L') // Remove L prefix. 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()); 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Invalid string token!"); 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove the front quote, replacing it with a space, so that the pragma 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // contents appear to have a space before them. 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[0] = ' '; 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Replace the terminating quote with a \n\0. 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[StrVal.size()-1] = '\n'; 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal += '\0'; 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove escaped quotes and escapes. 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = StrVal.size(); i != e-1; ++i) { 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[i] == '\\' && 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer (StrVal[i+1] == '\\' || StrVal[i+1] == '"')) { 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // \\ -> '\' and \" -> '"'. 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()+i); 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --e; 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Plop the string (including the newline and trailing null) into a buffer 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // where we can lex it. 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation TokLoc = CreateString(&StrVal[0], StrVal.size(), StrLoc); 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *StrData = SourceMgr.getCharacterData(TokLoc); 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Make and enter a lexer object so that we lex and expand the tokens just 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // like any others. 15925bdb51276d3bfc180a68688082071505a00ed27Chris Lattner Lexer *TL = new Lexer(TokLoc, *this, 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrData, StrData+StrVal.size()-1 /* no null */); 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ensure that the lexer thinks it is inside a directive, so that end \n will 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // return an EOM token. 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TL->ParsingPreprocessorDirective = true; 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This lexer really is for _Pragma. 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TL->Is_PragmaLexer = true; 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer EnterSourceFileWithLexer(TL, 0); 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // With everything set up, lex this as a #pragma directive. 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HandlePragmaDirective(); 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, return whatever came after the pragma directive. 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Lex(Tok); 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaOnce - Handle #pragma once. OnceTok is the 'once'. 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 182d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaOnce(Token &OnceTok) { 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(OnceTok, diag::pp_pragma_once_in_main_file); 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 189ac80c6e06b5815228e46294e51c493a74a21f8bcTed Kremenek unsigned FileID = getCurrentFileLexer()->getFileID(); 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a once-only file now. 192ac80c6e06b5815228e46294e51c493a74a21f8bcTed Kremenek HeaderInfo.MarkFileIncludeOnce(SourceMgr.getFileEntryForID(FileID)); 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1952243449253475574fc6f14986ff8f7fce5d46799Chris Lattnervoid Preprocessor::HandlePragmaMark() { 19617ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(CurPPLexer && "No current lexer?"); 19717ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek if (CurLexer) CurLexer->ReadToEndOfLine(); 19817ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek else CurPTHLexer->DiscardToEndOfLine(); 1992243449253475574fc6f14986ff8f7fce5d46799Chris Lattner} 2002243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2012243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaPoison - Handle #pragma GCC poison. PoisonTok is the 'poison'. 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 204d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaPoison(Token &PoisonTok) { 205d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the next token to poison. While doing this, pretend that we are 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // skipping while reading the identifier to poison. 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This avoids errors on code like: 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 21368a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = true; 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LexUnexpandedToken(Tok); 21568a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = false; 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we reached the end of line, we're done. 21822f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.is(tok::eom)) return; 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Can only poison identifiers. 22122f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.isNot(tok::identifier)) { 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_pp_invalid_poison); 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the identifier info for the token. We disabled identifier lookup 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // by saying we're skipping contents, so we need to do this manually. 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *II = LookUpIdentifierInfo(Tok); 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Already poisoned. 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (II->isPoisoned()) continue; 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a macro identifier, emit a warning. 2340edde55077cc3cb9fffeba19f5936f05a68c8e2bChris Lattner if (II->hasMacroDefinition()) 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::pp_poisoning_existing_macro); 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, poison it! 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer II->setIsPoisoned(); 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaSystemHeader - Implement #pragma GCC system_header. We know 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the whole directive has been parsed. 244d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) { 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file); 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 25135c10c25ddec4effbd26dead23ea5b04ee32f45aTed Kremenek PreprocessorLexer *TheLexer = getCurrentFileLexer(); 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a system header. 254ac80c6e06b5815228e46294e51c493a74a21f8bcTed Kremenek const FileEntry *File = SourceMgr.getFileEntryForID(TheLexer->getFileID()); 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HeaderInfo.MarkFileSystemHeader(File); 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Notify the client, if desired, that we are in a new source file. 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Callbacks) 25935c10c25ddec4effbd26dead23ea5b04ee32f45aTed Kremenek Callbacks->FileChanged(SysHeaderTok.getLocation(), 2600b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner PPCallbacks::SystemHeaderPragma, SrcMgr::C_System); 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaDependency - Handle #pragma GCC dependency "foo" blah. 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 265d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaDependency(Token &DependencyTok) { 266d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token FilenameTok; 26768a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek CurPPLexer->LexIncludeFilename(FilenameTok); 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the token kind is EOM, the error has already been diagnosed. 27022f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (FilenameTok.is(tok::eom)) 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reserve a buffer to get the spelling. 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::SmallVector<char, 128> FilenameBuffer; 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer FilenameBuffer.resize(FilenameTok.getLength()); 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 277f1c99acc544a4e70f308db4e7200ca04cd5a06d2Chris Lattner const char *FilenameStart = &FilenameBuffer[0]; 278f1c99acc544a4e70f308db4e7200ca04cd5a06d2Chris Lattner unsigned Len = getSpelling(FilenameTok, FilenameStart); 279f1c99acc544a4e70f308db4e7200ca04cd5a06d2Chris Lattner const char *FilenameEnd = FilenameStart+Len; 280f1c99acc544a4e70f308db4e7200ca04cd5a06d2Chris Lattner bool isAngled = GetIncludeFilenameSpelling(FilenameTok.getLocation(), 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer FilenameStart, FilenameEnd); 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If GetIncludeFilenameSpelling set the start ptr to null, there was an 2835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // error. 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FilenameStart == 0) 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Search include directories for this file. 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DirectoryLookup *CurDir; 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const FileEntry *File = LookupFile(FilenameStart, FilenameEnd, 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isAngled, 0, CurDir); 29156b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner if (File == 0) { 29256b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner Diag(FilenameTok, diag::err_pp_file_not_found) 29356b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner << std::string(FilenameStart, FilenameEnd); 29456b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner return; 29556b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner } 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 297ac80c6e06b5815228e46294e51c493a74a21f8bcTed Kremenek unsigned FileID = getCurrentFileLexer()->getFileID(); 298ac80c6e06b5815228e46294e51c493a74a21f8bcTed Kremenek const FileEntry *CurFile = SourceMgr.getFileEntryForID(FileID); 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this file is older than the file it depends on, emit a diagnostic. 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) { 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Lex tokens at the end of the message and include them in the message. 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string Message; 3045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 30522f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner while (DependencyTok.isNot(tok::eom)) { 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message += getSpelling(DependencyTok) + " "; 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message.erase(Message.end()-1); 31156b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message; 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 315636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// HandlePragmaComment - Handle the microsoft #pragma comment extension. The 316636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// syntax is: 317636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// #pragma comment(linker, "foo") 318636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// 'linker' is one of five identifiers: compiler, exestr, lib, linker, user. 319636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// "foo" is a string, which is fully macro expanded, and permits string 320636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// concatenation, embeded escape characters etc. See MSDN for more details. 321636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnervoid Preprocessor::HandlePragmaComment(Token &Tok) { 322636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner SourceLocation CommentLoc = Tok.getLocation(); 323636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 324636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::l_paren)) { 325636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 326636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 327636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 328636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 329636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Read the identifier. 330636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 331636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::identifier)) { 332636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 333636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 334636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 335636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 336636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Verify that this is one of the 5 whitelisted options. 337636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // FIXME: warn that 'exestr' is deprecated. 338636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner const IdentifierInfo *II = Tok.getIdentifierInfo(); 339636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (!II->isStr("compiler") && !II->isStr("exestr") && !II->isStr("lib") && 340636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner !II->isStr("linker") && !II->isStr("user")) { 341636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind); 342636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 343636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 344636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 345636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Check for optional string. 346636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // FIXME: If the kind is "compiler" warn if the string is present (it is 347636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // ignored). 348636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // FIXME: 'lib' requires a comment string. 349636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // FIXME: 'linker' requires a comment string, and has a specific list of 350636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // things that are allowable. 351636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 352636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.is(tok::comma)) { 353636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // FIXME: for now, we parse but ignore the string. 354636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 355636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 356636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // We need at least one string. 357636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.getKind() != tok::string_literal) { 358636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 359636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 360636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 361636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 362636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // String concatenation allows multiple strings, which can even come from 363636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // macro expansion. 364636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // "foo " "bar" "Baz" 365636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner while (Tok.getKind() == tok::string_literal) 366636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 367636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 368636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 369636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::r_paren)) { 370636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 371636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 372636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 373636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 374636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 375636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::eom)) { 376636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 377636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 378636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 379636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner} 380636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 381636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 382636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 3835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// AddPragmaHandler - Add the specified pragma handler to the preprocessor. 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If 'Namespace' is non-null, then it is a token required to exist on the 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// pragma line before the pragma string starts, e.g. "STDC" or "GCC". 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::AddPragmaHandler(const char *Namespace, 3885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *Handler) { 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaNamespace *InsertNS = PragmaHandlers; 3905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is specified to be in a namespace, step down into it. 3925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Namespace) { 3935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *NSID = getIdentifierInfo(Namespace); 3945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If there is already a pragma handler with the name of this namespace, 3965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we either have an error (directive with the same name as a namespace) or 3975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we already have the namespace to insert into. 3985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (PragmaHandler *Existing = PragmaHandlers->FindHandler(NSID)) { 3995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS = Existing->getIfNamespace(); 4005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(InsertNS != 0 && "Cannot have a pragma namespace and pragma" 4015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer " handler with the same name!"); 4025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this namespace doesn't exist yet, create and insert the 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // handler for it. 4055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS = new PragmaNamespace(NSID); 4065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->AddPragma(InsertNS); 4075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check to make sure we don't already have a pragma for this identifier. 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(!InsertNS->FindHandler(Handler->getName()) && 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Pragma handler already exists for this identifier!"); 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS->AddPragma(Handler); 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4164095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// RemovePragmaHandler - Remove the specific pragma handler from the 4174095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// preprocessor. If \arg Namespace is non-null, then it should be the 4184095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// namespace that \arg Handler was added to. It is an error to remove 4194095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// a handler that has not been registered. 4204095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbarvoid Preprocessor::RemovePragmaHandler(const char *Namespace, 4214095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandler *Handler) { 4224095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaNamespace *NS = PragmaHandlers; 4234095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4244095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is specified to be in a namespace, step down into it. 4254095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (Namespace) { 4264095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar IdentifierInfo *NSID = getIdentifierInfo(Namespace); 4274095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandler *Existing = PragmaHandlers->FindHandler(NSID); 4284095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(Existing && "Namespace containing handler does not exist!"); 4294095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4304095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS = Existing->getIfNamespace(); 4314095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(NS && "Invalid namespace, registered as a regular pragma handler!"); 4324095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 4334095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4344095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS->RemovePragmaHandler(Handler); 4354095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4364095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is a non-default namespace and it is now empty, remove 4374095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // it. 4384095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (NS != PragmaHandlers && NS->IsEmpty()) 4394095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandlers->RemovePragmaHandler(NS); 4404095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar} 4414095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencernamespace { 4432243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaOnceHandler - "#pragma once" marks the file as atomically included. 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaOnceHandler : public PragmaHandler { 4455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaOnceHandler(const IdentifierInfo *OnceID) : PragmaHandler(OnceID) {} 446d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &OnceTok) { 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.CheckEndOfDirective("#pragma once"); 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaOnce(OnceTok); 4495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4522243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaMarkHandler - "#pragma mark ..." is ignored by the compiler, and the 4532243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// rest of the line is not lexed. 4542243449253475574fc6f14986ff8f7fce5d46799Chris Lattnerstruct PragmaMarkHandler : public PragmaHandler { 4552243449253475574fc6f14986ff8f7fce5d46799Chris Lattner PragmaMarkHandler(const IdentifierInfo *MarkID) : PragmaHandler(MarkID) {} 4562243449253475574fc6f14986ff8f7fce5d46799Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &MarkTok) { 4572243449253475574fc6f14986ff8f7fce5d46799Chris Lattner PP.HandlePragmaMark(); 4582243449253475574fc6f14986ff8f7fce5d46799Chris Lattner } 4592243449253475574fc6f14986ff8f7fce5d46799Chris Lattner}; 4602243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 4612243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaPoisonHandler - "#pragma poison x" marks x as not usable. 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaPoisonHandler : public PragmaHandler { 4635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaPoisonHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 464d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &PoisonTok) { 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaPoison(PoisonTok); 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4692243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaSystemHeaderHandler - "#pragma system_header" marks the current file 4702243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// as a system header, which silences warnings in it. 4715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaSystemHeaderHandler : public PragmaHandler { 4725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaSystemHeaderHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 473d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &SHToken) { 4745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaSystemHeader(SHToken); 4755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.CheckEndOfDirective("#pragma"); 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaDependencyHandler : public PragmaHandler { 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaDependencyHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 480d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &DepToken) { 4815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaDependency(DepToken); 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 484636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 485636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// PragmaCommentHandler - "#pragma comment ...". 486636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnerstruct PragmaCommentHandler : public PragmaHandler { 487636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner PragmaCommentHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 488636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &CommentTok) { 489636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner PP.HandlePragmaComment(CommentTok); 490636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 491636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner}; 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} // end anonymous namespace 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// RegisterBuiltinPragmas - Install the standard preprocessor pragmas: 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// #pragma GCC poison/system_header/dependency and #pragma once. 4975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::RegisterBuiltinPragmas() { 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler(0, new PragmaOnceHandler(getIdentifierInfo("once"))); 4992243449253475574fc6f14986ff8f7fce5d46799Chris Lattner AddPragmaHandler(0, new PragmaMarkHandler(getIdentifierInfo("mark"))); 5005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaPoisonHandler(getIdentifierInfo("poison"))); 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaSystemHeaderHandler( 5025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer getIdentifierInfo("system_header"))); 5035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaDependencyHandler( 5045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer getIdentifierInfo("dependency"))); 505636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 506636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // MS extensions. 507636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Features.Microsoft) 508636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner AddPragmaHandler(0, new PragmaCommentHandler(getIdentifierInfo("comment"))); 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 510