Pragma.cpp revision f545be5552b6fd40a4c766fbf82dab0ab5305790
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" 19500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Lex/LexDiagnostic.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); 73af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner if (Handler == 0) { 74af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner PP.Diag(Tok, diag::warn_pragma_ignored); 75af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner return; 76af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner } 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, pass it down. 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Handler->HandlePragma(PP, Tok); 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Preprocessor Pragma Directive Handling. 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaDirective - The "#pragma" directive has been parsed. Lex the 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// rest of the pragma, passing it to the registered pragma handlers. 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::HandlePragmaDirective() { 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumPragma; 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Invoke the first level of pragma handlers which reads the namespace id. 92d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->HandlePragma(*this, Tok); 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the pragma handler didn't read the rest of the line, consume it now. 9668a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer->ParsingPreprocessorDirective) 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DiscardUntilEndOfDirective(); 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// return the first token after the directive. The _Pragma token has just 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// been read into 'Tok'. 103d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::Handle_Pragma(Token &Tok) { 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the pragma token location. 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation PragmaLoc = Tok.getLocation(); 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '('. 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1093692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::l_paren)) { 1103692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1113692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1123692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '"..."'. 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1163692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::string_literal) && Tok.isNot(tok::wide_string_literal)) { 1173692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1183692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1193692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the string. 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string StrVal = getSpelling(Tok); 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the ')'. 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1263692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::r_paren)) { 1273692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1283692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1293692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 131e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner SourceLocation RParenLoc = Tok.getLocation(); 132e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner 133a9d9145741ef77db45890911674705b81605b10bChris Lattner // The _Pragma is lexically sound. Destringize according to C99 6.10.9.1: 134a9d9145741ef77db45890911674705b81605b10bChris Lattner // "The string literal is destringized by deleting the L prefix, if present, 135a9d9145741ef77db45890911674705b81605b10bChris Lattner // deleting the leading and trailing double-quotes, replacing each escape 136a9d9145741ef77db45890911674705b81605b10bChris Lattner // sequence \" by a double-quote, and replacing each escape sequence \\ by a 137a9d9145741ef77db45890911674705b81605b10bChris Lattner // single backslash." 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[0] == 'L') // Remove L prefix. 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()); 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Invalid string token!"); 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove the front quote, replacing it with a space, so that the pragma 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // contents appear to have a space before them. 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[0] = ' '; 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1471fa495304c81e03f07f278a47b5efe9317104aabChris Lattner // Replace the terminating quote with a \n. 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[StrVal.size()-1] = '\n'; 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove escaped quotes and escapes. 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = StrVal.size(); i != e-1; ++i) { 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[i] == '\\' && 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer (StrVal[i+1] == '\\' || StrVal[i+1] == '"')) { 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // \\ -> '\' and \" -> '"'. 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()+i); 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --e; 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Plop the string (including the newline and trailing null) into a buffer 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // where we can lex it. 16247246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner Token TmpTok; 16347246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner TmpTok.startToken(); 16447246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner CreateString(&StrVal[0], StrVal.size(), TmpTok); 16547246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner SourceLocation TokLoc = TmpTok.getLocation(); 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Make and enter a lexer object so that we lex and expand the tokens just 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // like any others. 169e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner Lexer *TL = Lexer::Create_PragmaLexer(TokLoc, PragmaLoc, RParenLoc, 1701fa495304c81e03f07f278a47b5efe9317104aabChris Lattner StrVal.size(), *this); 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer EnterSourceFileWithLexer(TL, 0); 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // With everything set up, lex this as a #pragma directive. 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HandlePragmaDirective(); 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, return whatever came after the pragma directive. 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Lex(Tok); 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaOnce - Handle #pragma once. OnceTok is the 'once'. 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 185d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaOnce(Token &OnceTok) { 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(OnceTok, diag::pp_pragma_once_in_main_file); 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a once-only file now. 1932b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner HeaderInfo.MarkFileIncludeOnce(getCurrentFileLexer()->getFileEntry()); 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1962243449253475574fc6f14986ff8f7fce5d46799Chris Lattnervoid Preprocessor::HandlePragmaMark() { 19717ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(CurPPLexer && "No current lexer?"); 19817ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek if (CurLexer) CurLexer->ReadToEndOfLine(); 19917ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek else CurPTHLexer->DiscardToEndOfLine(); 2002243449253475574fc6f14986ff8f7fce5d46799Chris Lattner} 2012243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2022243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaPoison - Handle #pragma GCC poison. PoisonTok is the 'poison'. 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 205d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaPoison(Token &PoisonTok) { 206d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the next token to poison. While doing this, pretend that we are 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // skipping while reading the identifier to poison. 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This avoids errors on code like: 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 21468a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = true; 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LexUnexpandedToken(Tok); 21668a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = false; 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we reached the end of line, we're done. 21922f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.is(tok::eom)) return; 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Can only poison identifiers. 22222f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.isNot(tok::identifier)) { 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_pp_invalid_poison); 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the identifier info for the token. We disabled identifier lookup 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // by saying we're skipping contents, so we need to do this manually. 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *II = LookUpIdentifierInfo(Tok); 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Already poisoned. 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (II->isPoisoned()) continue; 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a macro identifier, emit a warning. 2350edde55077cc3cb9fffeba19f5936f05a68c8e2bChris Lattner if (II->hasMacroDefinition()) 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::pp_poisoning_existing_macro); 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, poison it! 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer II->setIsPoisoned(); 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaSystemHeader - Implement #pragma GCC system_header. We know 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the whole directive has been parsed. 245d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) { 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file); 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 25235c10c25ddec4effbd26dead23ea5b04ee32f45aTed Kremenek PreprocessorLexer *TheLexer = getCurrentFileLexer(); 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a system header. 2552b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner HeaderInfo.MarkFileSystemHeader(TheLexer->getFileEntry()); 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 2972b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry(); 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this file is older than the file it depends on, emit a diagnostic. 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) { 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Lex tokens at the end of the message and include them in the message. 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string Message; 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 30422f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner while (DependencyTok.isNot(tok::eom)) { 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message += getSpelling(DependencyTok) + " "; 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message.erase(Message.end()-1); 31056b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message; 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 314636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// HandlePragmaComment - Handle the microsoft #pragma comment extension. The 315636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// syntax is: 316636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// #pragma comment(linker, "foo") 317636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// 'linker' is one of five identifiers: compiler, exestr, lib, linker, user. 318636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// "foo" is a string, which is fully macro expanded, and permits string 319d7ee349f1dd84e023d09a35fb4d40c15888a55acGabor Greif/// concatenation, embedded escape characters etc. See MSDN for more details. 320636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnervoid Preprocessor::HandlePragmaComment(Token &Tok) { 321636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner SourceLocation CommentLoc = Tok.getLocation(); 322636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 323636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::l_paren)) { 324636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 325636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 326636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 327636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 328636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Read the identifier. 329636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 330636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::identifier)) { 331636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 332636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 333636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 334636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 335636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Verify that this is one of the 5 whitelisted options. 336636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // FIXME: warn that 'exestr' is deprecated. 337636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner const IdentifierInfo *II = Tok.getIdentifierInfo(); 338636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (!II->isStr("compiler") && !II->isStr("exestr") && !II->isStr("lib") && 339636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner !II->isStr("linker") && !II->isStr("user")) { 340636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind); 341636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 342636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 343636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 344a9d9145741ef77db45890911674705b81605b10bChris Lattner // Read the optional string if present. 345636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 346a9d9145741ef77db45890911674705b81605b10bChris Lattner std::string ArgumentString; 347636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.is(tok::comma)) { 348a9d9145741ef77db45890911674705b81605b10bChris Lattner Lex(Tok); // eat the comma. 349636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 350636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // We need at least one string. 351636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.getKind() != tok::string_literal) { 352636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 353636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 354636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 355636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 356636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // String concatenation allows multiple strings, which can even come from 357636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // macro expansion. 358636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // "foo " "bar" "Baz" 359a9d9145741ef77db45890911674705b81605b10bChris Lattner llvm::SmallVector<Token, 4> StrToks; 360a9d9145741ef77db45890911674705b81605b10bChris Lattner while (Tok.getKind() == tok::string_literal) { 361a9d9145741ef77db45890911674705b81605b10bChris Lattner StrToks.push_back(Tok); 362636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 363a9d9145741ef77db45890911674705b81605b10bChris Lattner } 364a9d9145741ef77db45890911674705b81605b10bChris Lattner 365a9d9145741ef77db45890911674705b81605b10bChris Lattner // Concatenate and parse the strings. 366a9d9145741ef77db45890911674705b81605b10bChris Lattner StringLiteralParser Literal(&StrToks[0], StrToks.size(), *this); 367a9d9145741ef77db45890911674705b81605b10bChris Lattner assert(!Literal.AnyWide && "Didn't allow wide strings in"); 368a9d9145741ef77db45890911674705b81605b10bChris Lattner if (Literal.hadError) 369a9d9145741ef77db45890911674705b81605b10bChris Lattner return; 370a9d9145741ef77db45890911674705b81605b10bChris Lattner if (Literal.Pascal) { 371a9d9145741ef77db45890911674705b81605b10bChris Lattner Diag(StrToks[0].getLocation(), diag::err_pragma_comment_malformed); 372a9d9145741ef77db45890911674705b81605b10bChris Lattner return; 373a9d9145741ef77db45890911674705b81605b10bChris Lattner } 374a9d9145741ef77db45890911674705b81605b10bChris Lattner 375a9d9145741ef77db45890911674705b81605b10bChris Lattner ArgumentString = std::string(Literal.GetString(), 376a9d9145741ef77db45890911674705b81605b10bChris Lattner Literal.GetString()+Literal.GetStringLength()); 377636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 378636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 379a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: If the kind is "compiler" warn if the string is present (it is 380a9d9145741ef77db45890911674705b81605b10bChris Lattner // ignored). 381a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: 'lib' requires a comment string. 382a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: 'linker' requires a comment string, and has a specific list of 383a9d9145741ef77db45890911674705b81605b10bChris Lattner // things that are allowable. 384a9d9145741ef77db45890911674705b81605b10bChris Lattner 385636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::r_paren)) { 386636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 387636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 388636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 389a9d9145741ef77db45890911674705b81605b10bChris Lattner Lex(Tok); // eat the r_paren. 390636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 391636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::eom)) { 392636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 393636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 394636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 395a9d9145741ef77db45890911674705b81605b10bChris Lattner 396a9d9145741ef77db45890911674705b81605b10bChris Lattner // If the pragma is lexically sound, notify any interested PPCallbacks. 397172e336b12fa32a1737f66d77a3f2de86f9cc8e8Chris Lattner if (Callbacks) 398172e336b12fa32a1737f66d77a3f2de86f9cc8e8Chris Lattner Callbacks->PragmaComment(CommentLoc, II, ArgumentString); 399636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner} 400636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 401636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 402636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// AddPragmaHandler - Add the specified pragma handler to the preprocessor. 4055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If 'Namespace' is non-null, then it is a token required to exist on the 4065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// pragma line before the pragma string starts, e.g. "STDC" or "GCC". 4075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::AddPragmaHandler(const char *Namespace, 4085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *Handler) { 4095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaNamespace *InsertNS = PragmaHandlers; 4105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is specified to be in a namespace, step down into it. 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Namespace) { 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *NSID = getIdentifierInfo(Namespace); 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If there is already a pragma handler with the name of this namespace, 4165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we either have an error (directive with the same name as a namespace) or 4175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we already have the namespace to insert into. 4185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (PragmaHandler *Existing = PragmaHandlers->FindHandler(NSID)) { 4195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS = Existing->getIfNamespace(); 4205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(InsertNS != 0 && "Cannot have a pragma namespace and pragma" 4215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer " handler with the same name!"); 4225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this namespace doesn't exist yet, create and insert the 4245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // handler for it. 4255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS = new PragmaNamespace(NSID); 4265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->AddPragma(InsertNS); 4275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check to make sure we don't already have a pragma for this identifier. 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(!InsertNS->FindHandler(Handler->getName()) && 4325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Pragma handler already exists for this identifier!"); 4335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS->AddPragma(Handler); 4345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4364095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// RemovePragmaHandler - Remove the specific pragma handler from the 4374095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// preprocessor. If \arg Namespace is non-null, then it should be the 4384095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// namespace that \arg Handler was added to. It is an error to remove 4394095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// a handler that has not been registered. 4404095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbarvoid Preprocessor::RemovePragmaHandler(const char *Namespace, 4414095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandler *Handler) { 4424095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaNamespace *NS = PragmaHandlers; 4434095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4444095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is specified to be in a namespace, step down into it. 4454095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (Namespace) { 4464095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar IdentifierInfo *NSID = getIdentifierInfo(Namespace); 4474095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandler *Existing = PragmaHandlers->FindHandler(NSID); 4484095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(Existing && "Namespace containing handler does not exist!"); 4494095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4504095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS = Existing->getIfNamespace(); 4514095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(NS && "Invalid namespace, registered as a regular pragma handler!"); 4524095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 4534095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4544095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS->RemovePragmaHandler(Handler); 4554095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4564095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is a non-default namespace and it is now empty, remove 4574095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // it. 4584095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (NS != PragmaHandlers && NS->IsEmpty()) 4594095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandlers->RemovePragmaHandler(NS); 4604095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar} 4614095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencernamespace { 4632243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaOnceHandler - "#pragma once" marks the file as atomically included. 4645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaOnceHandler : public PragmaHandler { 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaOnceHandler(const IdentifierInfo *OnceID) : PragmaHandler(OnceID) {} 466d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &OnceTok) { 46735410d5cbbb18735d76e00496540d416dc49b577Chris Lattner PP.CheckEndOfDirective("pragma once"); 4685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaOnce(OnceTok); 4695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4722243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaMarkHandler - "#pragma mark ..." is ignored by the compiler, and the 4732243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// rest of the line is not lexed. 4742243449253475574fc6f14986ff8f7fce5d46799Chris Lattnerstruct PragmaMarkHandler : public PragmaHandler { 4752243449253475574fc6f14986ff8f7fce5d46799Chris Lattner PragmaMarkHandler(const IdentifierInfo *MarkID) : PragmaHandler(MarkID) {} 4762243449253475574fc6f14986ff8f7fce5d46799Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &MarkTok) { 4772243449253475574fc6f14986ff8f7fce5d46799Chris Lattner PP.HandlePragmaMark(); 4782243449253475574fc6f14986ff8f7fce5d46799Chris Lattner } 4792243449253475574fc6f14986ff8f7fce5d46799Chris Lattner}; 4802243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 4812243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaPoisonHandler - "#pragma poison x" marks x as not usable. 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaPoisonHandler : public PragmaHandler { 4835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaPoisonHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 484d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &PoisonTok) { 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaPoison(PoisonTok); 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4892243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaSystemHeaderHandler - "#pragma system_header" marks the current file 4902243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// as a system header, which silences warnings in it. 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaSystemHeaderHandler : public PragmaHandler { 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaSystemHeaderHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 493d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &SHToken) { 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaSystemHeader(SHToken); 49535410d5cbbb18735d76e00496540d416dc49b577Chris Lattner PP.CheckEndOfDirective("pragma"); 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaDependencyHandler : public PragmaHandler { 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaDependencyHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 500d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &DepToken) { 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaDependency(DepToken); 5025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 504636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 505636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// PragmaCommentHandler - "#pragma comment ...". 506636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnerstruct PragmaCommentHandler : public PragmaHandler { 507636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner PragmaCommentHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 508636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &CommentTok) { 509636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner PP.HandlePragmaComment(CommentTok); 510636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 511636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner}; 512062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner 513062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner// Pragma STDC implementations. 514062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner 515062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_FP_CONTRACTHandler - "#pragma STDC FP_CONTRACT ...". 516062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_FP_CONTRACTHandler : public PragmaHandler { 517062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner PragmaSTDC_FP_CONTRACTHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 518f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &Tok) { 519f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner //PP.HandlePragmaFP_CONTRACT(CommentTok); 520062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 521062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 522062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner 523062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_FENV_ACCESSHandler - "#pragma STDC FENV_ACCESS ...". 524062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_FENV_ACCESSHandler : public PragmaHandler { 525062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner PragmaSTDC_FENV_ACCESSHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 526f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &Tok) { 527f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner //PP.HandlePragmaFENV_ACCESS(CommentTok); 528062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 529062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 530062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner 531062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_CX_LIMITED_RANGEHandler - "#pragma STDC CX_LIMITED_RANGE ...". 532062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_CX_LIMITED_RANGEHandler : public PragmaHandler { 533062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner PragmaSTDC_CX_LIMITED_RANGEHandler(const IdentifierInfo *ID) 534062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner : PragmaHandler(ID) {} 535f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &Tok) { 536f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner //PP.HandlePragmaCX_LIMITED_RANGE(CommentTok); 537062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 538062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 539062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner 540062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_UnknownHandler - "#pragma STDC ...". 541062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_UnknownHandler : public PragmaHandler { 542062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner PragmaSTDC_UnknownHandler() : PragmaHandler(0) {} 543f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &UnknownTok) { 544f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner PP.Diag(UnknownTok, diag::ext_stdc_pragma_ignored); 545062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 546062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 547062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} // end anonymous namespace 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// RegisterBuiltinPragmas - Install the standard preprocessor pragmas: 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// #pragma GCC poison/system_header/dependency and #pragma once. 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::RegisterBuiltinPragmas() { 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler(0, new PragmaOnceHandler(getIdentifierInfo("once"))); 5552243449253475574fc6f14986ff8f7fce5d46799Chris Lattner AddPragmaHandler(0, new PragmaMarkHandler(getIdentifierInfo("mark"))); 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaPoisonHandler(getIdentifierInfo("poison"))); 5575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaSystemHeaderHandler( 5585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer getIdentifierInfo("system_header"))); 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaDependencyHandler( 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer getIdentifierInfo("dependency"))); 561636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 562062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner AddPragmaHandler("STDC", new PragmaSTDC_FP_CONTRACTHandler( 563062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner getIdentifierInfo("FP_CONTRACT"))); 564062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner AddPragmaHandler("STDC", new PragmaSTDC_FENV_ACCESSHandler( 565062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner getIdentifierInfo("FENV_ACCESS"))); 566062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner AddPragmaHandler("STDC", new PragmaSTDC_CX_LIMITED_RANGEHandler( 567062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner getIdentifierInfo("CX_LIMITED_RANGE"))); 568062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner AddPragmaHandler("STDC", new PragmaSTDC_UnknownHandler()); 569062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner 570636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // MS extensions. 571636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Features.Microsoft) 572636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner AddPragmaHandler(0, new PragmaCommentHandler(getIdentifierInfo("comment"))); 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 574