Pragma.cpp revision 47246be8ac5b0ddde6c402b8fc6946b6135487b5
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" 17a9d9145741ef77db45890911674705b81605b10bChris Lattner#include "clang/Lex/LiteralSupport.h" 185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Preprocessor.h" 195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/Diagnostic.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/FileManager.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/SourceManager.h" 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Out-of-line destructor to provide a home for the class. 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaHandler::~PragmaHandler() { 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// PragmaNamespace Implementation. 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaNamespace::~PragmaNamespace() { 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = Handlers.size(); i != e; ++i) 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete Handlers[i]; 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FindHandler - Check to see if there is already a handler for the 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// specified name. If not, return the handler for the null identifier if it 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// exists, otherwise return null. If IgnoreNull is true (the default) then 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// the null handler isn't returned on failure to match. 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaHandler *PragmaNamespace::FindHandler(const IdentifierInfo *Name, 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool IgnoreNull) const { 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *NullHandler = 0; 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = Handlers.size(); i != e; ++i) { 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Handlers[i]->getName() == Name) 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Handlers[i]; 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Handlers[i]->getName() == 0) 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer NullHandler = Handlers[i]; 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return IgnoreNull ? 0 : NullHandler; 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 554095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbarvoid PragmaNamespace::RemovePragmaHandler(PragmaHandler *Handler) { 564095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar for (unsigned i = 0, e = Handlers.size(); i != e; ++i) { 574095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (Handlers[i] == Handler) { 584095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar Handlers[i] = Handlers.back(); 594095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar Handlers.pop_back(); 604095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar return; 614095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 624095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 634095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(0 && "Handler not registered in this namespace"); 644095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar} 654095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 66d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid PragmaNamespace::HandlePragma(Preprocessor &PP, Token &Tok) { 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the 'namespace' that the directive is in, e.g. STDC. Do not macro 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // expand it, the user can have a STDC #define, that should not affect this. 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexUnexpandedToken(Tok); 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the handler for this token. If there is no handler, ignore the pragma. 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *Handler = FindHandler(Tok.getIdentifierInfo(), false); 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Handler == 0) return; 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, pass it down. 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Handler->HandlePragma(PP, Tok); 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Preprocessor Pragma Directive Handling. 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaDirective - The "#pragma" directive has been parsed. Lex the 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// rest of the pragma, passing it to the registered pragma handlers. 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::HandlePragmaDirective() { 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumPragma; 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Invoke the first level of pragma handlers which reads the namespace id. 89d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->HandlePragma(*this, Tok); 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the pragma handler didn't read the rest of the line, consume it now. 9368a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer->ParsingPreprocessorDirective) 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DiscardUntilEndOfDirective(); 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// return the first token after the directive. The _Pragma token has just 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// been read into 'Tok'. 100d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::Handle_Pragma(Token &Tok) { 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the pragma token location. 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation PragmaLoc = Tok.getLocation(); 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '('. 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1063692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::l_paren)) { 1073692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1083692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1093692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '"..."'. 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1133692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::string_literal) && Tok.isNot(tok::wide_string_literal)) { 1143692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1153692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1163692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the string. 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string StrVal = getSpelling(Tok); 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation StrLoc = Tok.getLocation(); 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the ')'. 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1243692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::r_paren)) { 1253692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1263692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1273692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 129a9d9145741ef77db45890911674705b81605b10bChris Lattner // The _Pragma is lexically sound. Destringize according to C99 6.10.9.1: 130a9d9145741ef77db45890911674705b81605b10bChris Lattner // "The string literal is destringized by deleting the L prefix, if present, 131a9d9145741ef77db45890911674705b81605b10bChris Lattner // deleting the leading and trailing double-quotes, replacing each escape 132a9d9145741ef77db45890911674705b81605b10bChris Lattner // sequence \" by a double-quote, and replacing each escape sequence \\ by a 133a9d9145741ef77db45890911674705b81605b10bChris Lattner // single backslash." 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[0] == 'L') // Remove L prefix. 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()); 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Invalid string token!"); 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove the front quote, replacing it with a space, so that the pragma 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // contents appear to have a space before them. 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[0] = ' '; 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Replace the terminating quote with a \n\0. 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[StrVal.size()-1] = '\n'; 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal += '\0'; 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove escaped quotes and escapes. 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = StrVal.size(); i != e-1; ++i) { 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[i] == '\\' && 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer (StrVal[i+1] == '\\' || StrVal[i+1] == '"')) { 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // \\ -> '\' and \" -> '"'. 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()+i); 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --e; 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Plop the string (including the newline and trailing null) into a buffer 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // where we can lex it. 15947246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner Token TmpTok; 16047246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner TmpTok.startToken(); 16147246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner CreateString(&StrVal[0], StrVal.size(), TmpTok); 16247246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner SourceLocation TokLoc = TmpTok.getLocation(); 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Make and enter a lexer object so that we lex and expand the tokens just 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // like any others. 166bcc2a67e5180612417727cbdd8afd0f79fdf726dChris Lattner Lexer *TL = Lexer::Create_PragmaLexer(TokLoc, StrLoc, 16742e00d19b0dac64732eb5449d52a076282fcbf77Chris Lattner // do not include the null in the count. 16842e00d19b0dac64732eb5449d52a076282fcbf77Chris Lattner StrVal.size()-1, *this); 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer EnterSourceFileWithLexer(TL, 0); 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // With everything set up, lex this as a #pragma directive. 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HandlePragmaDirective(); 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, return whatever came after the pragma directive. 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Lex(Tok); 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaOnce - Handle #pragma once. OnceTok is the 'once'. 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 183d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaOnce(Token &OnceTok) { 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(OnceTok, diag::pp_pragma_once_in_main_file); 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a once-only file now. 1912b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner HeaderInfo.MarkFileIncludeOnce(getCurrentFileLexer()->getFileEntry()); 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1942243449253475574fc6f14986ff8f7fce5d46799Chris Lattnervoid Preprocessor::HandlePragmaMark() { 19517ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(CurPPLexer && "No current lexer?"); 19617ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek if (CurLexer) CurLexer->ReadToEndOfLine(); 19717ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek else CurPTHLexer->DiscardToEndOfLine(); 1982243449253475574fc6f14986ff8f7fce5d46799Chris Lattner} 1992243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2002243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaPoison - Handle #pragma GCC poison. PoisonTok is the 'poison'. 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 203d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaPoison(Token &PoisonTok) { 204d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the next token to poison. While doing this, pretend that we are 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // skipping while reading the identifier to poison. 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This avoids errors on code like: 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 21268a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = true; 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LexUnexpandedToken(Tok); 21468a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = false; 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we reached the end of line, we're done. 21722f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.is(tok::eom)) return; 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Can only poison identifiers. 22022f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.isNot(tok::identifier)) { 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_pp_invalid_poison); 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the identifier info for the token. We disabled identifier lookup 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // by saying we're skipping contents, so we need to do this manually. 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *II = LookUpIdentifierInfo(Tok); 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Already poisoned. 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (II->isPoisoned()) continue; 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a macro identifier, emit a warning. 2330edde55077cc3cb9fffeba19f5936f05a68c8e2bChris Lattner if (II->hasMacroDefinition()) 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::pp_poisoning_existing_macro); 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, poison it! 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer II->setIsPoisoned(); 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaSystemHeader - Implement #pragma GCC system_header. We know 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the whole directive has been parsed. 243d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) { 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file); 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 25035c10c25ddec4effbd26dead23ea5b04ee32f45aTed Kremenek PreprocessorLexer *TheLexer = getCurrentFileLexer(); 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a system header. 2532b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner HeaderInfo.MarkFileSystemHeader(TheLexer->getFileEntry()); 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Notify the client, if desired, that we are in a new source file. 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Callbacks) 25735c10c25ddec4effbd26dead23ea5b04ee32f45aTed Kremenek Callbacks->FileChanged(SysHeaderTok.getLocation(), 2580b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner PPCallbacks::SystemHeaderPragma, SrcMgr::C_System); 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaDependency - Handle #pragma GCC dependency "foo" blah. 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 263d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaDependency(Token &DependencyTok) { 264d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token FilenameTok; 26568a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek CurPPLexer->LexIncludeFilename(FilenameTok); 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the token kind is EOM, the error has already been diagnosed. 26822f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (FilenameTok.is(tok::eom)) 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reserve a buffer to get the spelling. 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::SmallVector<char, 128> FilenameBuffer; 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer FilenameBuffer.resize(FilenameTok.getLength()); 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 275f1c99acc544a4e70f308db4e7200ca04cd5a06d2Chris Lattner const char *FilenameStart = &FilenameBuffer[0]; 276f1c99acc544a4e70f308db4e7200ca04cd5a06d2Chris Lattner unsigned Len = getSpelling(FilenameTok, FilenameStart); 277f1c99acc544a4e70f308db4e7200ca04cd5a06d2Chris Lattner const char *FilenameEnd = FilenameStart+Len; 278f1c99acc544a4e70f308db4e7200ca04cd5a06d2Chris Lattner bool isAngled = GetIncludeFilenameSpelling(FilenameTok.getLocation(), 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer FilenameStart, FilenameEnd); 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If GetIncludeFilenameSpelling set the start ptr to null, there was an 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // error. 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FilenameStart == 0) 2835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Search include directories for this file. 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DirectoryLookup *CurDir; 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const FileEntry *File = LookupFile(FilenameStart, FilenameEnd, 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isAngled, 0, CurDir); 28956b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner if (File == 0) { 29056b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner Diag(FilenameTok, diag::err_pp_file_not_found) 29156b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner << std::string(FilenameStart, FilenameEnd); 29256b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner return; 29356b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner } 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2952b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry(); 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this file is older than the file it depends on, emit a diagnostic. 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) { 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Lex tokens at the end of the message and include them in the message. 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string Message; 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 30222f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner while (DependencyTok.isNot(tok::eom)) { 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message += getSpelling(DependencyTok) + " "; 3045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message.erase(Message.end()-1); 30856b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message; 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 312636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// HandlePragmaComment - Handle the microsoft #pragma comment extension. The 313636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// syntax is: 314636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// #pragma comment(linker, "foo") 315636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// 'linker' is one of five identifiers: compiler, exestr, lib, linker, user. 316636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// "foo" is a string, which is fully macro expanded, and permits string 317636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// concatenation, embeded escape characters etc. See MSDN for more details. 318636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnervoid Preprocessor::HandlePragmaComment(Token &Tok) { 319636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner SourceLocation CommentLoc = Tok.getLocation(); 320636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 321636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::l_paren)) { 322636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 323636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 324636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 325636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 326636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Read the identifier. 327636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 328636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::identifier)) { 329636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 330636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 331636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 332636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 333636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Verify that this is one of the 5 whitelisted options. 334636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // FIXME: warn that 'exestr' is deprecated. 335636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner const IdentifierInfo *II = Tok.getIdentifierInfo(); 336636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (!II->isStr("compiler") && !II->isStr("exestr") && !II->isStr("lib") && 337636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner !II->isStr("linker") && !II->isStr("user")) { 338636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind); 339636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 340636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 341636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 342a9d9145741ef77db45890911674705b81605b10bChris Lattner // Read the optional string if present. 343636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 344a9d9145741ef77db45890911674705b81605b10bChris Lattner std::string ArgumentString; 345636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.is(tok::comma)) { 346a9d9145741ef77db45890911674705b81605b10bChris Lattner Lex(Tok); // eat the comma. 347636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 348636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // We need at least one string. 349636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.getKind() != tok::string_literal) { 350636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 351636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 352636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 353636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 354636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // String concatenation allows multiple strings, which can even come from 355636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // macro expansion. 356636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // "foo " "bar" "Baz" 357a9d9145741ef77db45890911674705b81605b10bChris Lattner llvm::SmallVector<Token, 4> StrToks; 358a9d9145741ef77db45890911674705b81605b10bChris Lattner while (Tok.getKind() == tok::string_literal) { 359a9d9145741ef77db45890911674705b81605b10bChris Lattner StrToks.push_back(Tok); 360636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 361a9d9145741ef77db45890911674705b81605b10bChris Lattner } 362a9d9145741ef77db45890911674705b81605b10bChris Lattner 363a9d9145741ef77db45890911674705b81605b10bChris Lattner // Concatenate and parse the strings. 364a9d9145741ef77db45890911674705b81605b10bChris Lattner StringLiteralParser Literal(&StrToks[0], StrToks.size(), *this); 365a9d9145741ef77db45890911674705b81605b10bChris Lattner assert(!Literal.AnyWide && "Didn't allow wide strings in"); 366a9d9145741ef77db45890911674705b81605b10bChris Lattner if (Literal.hadError) 367a9d9145741ef77db45890911674705b81605b10bChris Lattner return; 368a9d9145741ef77db45890911674705b81605b10bChris Lattner if (Literal.Pascal) { 369a9d9145741ef77db45890911674705b81605b10bChris Lattner Diag(StrToks[0].getLocation(), diag::err_pragma_comment_malformed); 370a9d9145741ef77db45890911674705b81605b10bChris Lattner return; 371a9d9145741ef77db45890911674705b81605b10bChris Lattner } 372a9d9145741ef77db45890911674705b81605b10bChris Lattner 373a9d9145741ef77db45890911674705b81605b10bChris Lattner ArgumentString = std::string(Literal.GetString(), 374a9d9145741ef77db45890911674705b81605b10bChris Lattner Literal.GetString()+Literal.GetStringLength()); 375636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 376636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 377a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: If the kind is "compiler" warn if the string is present (it is 378a9d9145741ef77db45890911674705b81605b10bChris Lattner // ignored). 379a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: 'lib' requires a comment string. 380a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: 'linker' requires a comment string, and has a specific list of 381a9d9145741ef77db45890911674705b81605b10bChris Lattner // things that are allowable. 382a9d9145741ef77db45890911674705b81605b10bChris Lattner 383636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::r_paren)) { 384636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 385636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 386636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 387a9d9145741ef77db45890911674705b81605b10bChris Lattner Lex(Tok); // eat the r_paren. 388636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 389636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::eom)) { 390636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 391636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 392636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 393a9d9145741ef77db45890911674705b81605b10bChris Lattner 394a9d9145741ef77db45890911674705b81605b10bChris Lattner // If the pragma is lexically sound, notify any interested PPCallbacks. 395172e336b12fa32a1737f66d77a3f2de86f9cc8e8Chris Lattner if (Callbacks) 396172e336b12fa32a1737f66d77a3f2de86f9cc8e8Chris Lattner Callbacks->PragmaComment(CommentLoc, II, ArgumentString); 397636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner} 398636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 399636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 400636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 4015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// AddPragmaHandler - Add the specified pragma handler to the preprocessor. 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If 'Namespace' is non-null, then it is a token required to exist on the 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// pragma line before the pragma string starts, e.g. "STDC" or "GCC". 4055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::AddPragmaHandler(const char *Namespace, 4065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *Handler) { 4075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaNamespace *InsertNS = PragmaHandlers; 4085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is specified to be in a namespace, step down into it. 4105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Namespace) { 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *NSID = getIdentifierInfo(Namespace); 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If there is already a pragma handler with the name of this namespace, 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we either have an error (directive with the same name as a namespace) or 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we already have the namespace to insert into. 4165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (PragmaHandler *Existing = PragmaHandlers->FindHandler(NSID)) { 4175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS = Existing->getIfNamespace(); 4185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(InsertNS != 0 && "Cannot have a pragma namespace and pragma" 4195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer " handler with the same name!"); 4205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this namespace doesn't exist yet, create and insert the 4225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // handler for it. 4235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS = new PragmaNamespace(NSID); 4245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->AddPragma(InsertNS); 4255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check to make sure we don't already have a pragma for this identifier. 4295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(!InsertNS->FindHandler(Handler->getName()) && 4305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Pragma handler already exists for this identifier!"); 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS->AddPragma(Handler); 4325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4344095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// RemovePragmaHandler - Remove the specific pragma handler from the 4354095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// preprocessor. If \arg Namespace is non-null, then it should be the 4364095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// namespace that \arg Handler was added to. It is an error to remove 4374095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// a handler that has not been registered. 4384095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbarvoid Preprocessor::RemovePragmaHandler(const char *Namespace, 4394095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandler *Handler) { 4404095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaNamespace *NS = PragmaHandlers; 4414095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4424095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is specified to be in a namespace, step down into it. 4434095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (Namespace) { 4444095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar IdentifierInfo *NSID = getIdentifierInfo(Namespace); 4454095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandler *Existing = PragmaHandlers->FindHandler(NSID); 4464095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(Existing && "Namespace containing handler does not exist!"); 4474095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4484095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS = Existing->getIfNamespace(); 4494095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(NS && "Invalid namespace, registered as a regular pragma handler!"); 4504095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 4514095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4524095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS->RemovePragmaHandler(Handler); 4534095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4544095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is a non-default namespace and it is now empty, remove 4554095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // it. 4564095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (NS != PragmaHandlers && NS->IsEmpty()) 4574095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandlers->RemovePragmaHandler(NS); 4584095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar} 4594095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencernamespace { 4612243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaOnceHandler - "#pragma once" marks the file as atomically included. 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaOnceHandler : public PragmaHandler { 4635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaOnceHandler(const IdentifierInfo *OnceID) : PragmaHandler(OnceID) {} 464d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &OnceTok) { 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.CheckEndOfDirective("#pragma once"); 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaOnce(OnceTok); 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4702243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaMarkHandler - "#pragma mark ..." is ignored by the compiler, and the 4712243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// rest of the line is not lexed. 4722243449253475574fc6f14986ff8f7fce5d46799Chris Lattnerstruct PragmaMarkHandler : public PragmaHandler { 4732243449253475574fc6f14986ff8f7fce5d46799Chris Lattner PragmaMarkHandler(const IdentifierInfo *MarkID) : PragmaHandler(MarkID) {} 4742243449253475574fc6f14986ff8f7fce5d46799Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &MarkTok) { 4752243449253475574fc6f14986ff8f7fce5d46799Chris Lattner PP.HandlePragmaMark(); 4762243449253475574fc6f14986ff8f7fce5d46799Chris Lattner } 4772243449253475574fc6f14986ff8f7fce5d46799Chris Lattner}; 4782243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 4792243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaPoisonHandler - "#pragma poison x" marks x as not usable. 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaPoisonHandler : public PragmaHandler { 4815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaPoisonHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 482d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &PoisonTok) { 4835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaPoison(PoisonTok); 4845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4872243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaSystemHeaderHandler - "#pragma system_header" marks the current file 4882243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// as a system header, which silences warnings in it. 4895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaSystemHeaderHandler : public PragmaHandler { 4905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaSystemHeaderHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 491d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &SHToken) { 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaSystemHeader(SHToken); 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.CheckEndOfDirective("#pragma"); 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaDependencyHandler : public PragmaHandler { 4975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaDependencyHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 498d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &DepToken) { 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaDependency(DepToken); 5005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 502636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 503636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// PragmaCommentHandler - "#pragma comment ...". 504636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnerstruct PragmaCommentHandler : public PragmaHandler { 505636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner PragmaCommentHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 506636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &CommentTok) { 507636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner PP.HandlePragmaComment(CommentTok); 508636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 509636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner}; 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} // end anonymous namespace 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// RegisterBuiltinPragmas - Install the standard preprocessor pragmas: 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// #pragma GCC poison/system_header/dependency and #pragma once. 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::RegisterBuiltinPragmas() { 5165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler(0, new PragmaOnceHandler(getIdentifierInfo("once"))); 5172243449253475574fc6f14986ff8f7fce5d46799Chris Lattner AddPragmaHandler(0, new PragmaMarkHandler(getIdentifierInfo("mark"))); 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaPoisonHandler(getIdentifierInfo("poison"))); 5195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaSystemHeaderHandler( 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer getIdentifierInfo("system_header"))); 5215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaDependencyHandler( 5225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer getIdentifierInfo("dependency"))); 523636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 524636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // MS extensions. 525636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Features.Microsoft) 526636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner AddPragmaHandler(0, new PragmaCommentHandler(getIdentifierInfo("comment"))); 5275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 528