/** * Defines a package and module. * * Specification: $(LINK2 https://dlang.org/spec/module.html, Modules) * * Copyright: Copyright (C) 1999-2022 by The D Language Foundation, All Rights Reserved * Authors: $(LINK2 https://www.digitalmars.com, Walter Bright) * License: $(LINK2 https://www.boost.org/LICENSE_1_0.txt, Boost License 1.0) * Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/dmodule.d, _dmodule.d) * Documentation: https://dlang.org/phobos/dmd_dmodule.html * Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/dmodule.d */ module dmd.dmodule; import core.stdc.stdio; import core.stdc.stdlib; import core.stdc.string; import dmd.aggregate; import dmd.arraytypes; import dmd.astcodegen; import dmd.astenums; import dmd.compiler; import dmd.gluelayer; import dmd.dimport; import dmd.dmacro; import dmd.doc; import dmd.dscope; import dmd.dsymbol; import dmd.dsymbolsem; import dmd.errors; import dmd.expression; import dmd.expressionsem; import dmd.file_manager; import dmd.globals; import dmd.id; import dmd.identifier; import dmd.parse; import dmd.cparse; import dmd.root.array; import dmd.root.file; import dmd.root.filename; import dmd.common.outbuffer; import dmd.root.port; import dmd.root.rmem; import dmd.root.rootobject; import dmd.root.string; import dmd.semantic2; import dmd.semantic3; import dmd.target; import dmd.utils; import dmd.visitor; // function used to call semantic3 on a module's dependencies void semantic3OnDependencies(Module m) { if (!m) return; if (m.semanticRun > PASS.semantic3) return; m.semantic3(null); foreach (i; 1 .. m.aimports.dim) semantic3OnDependencies(m.aimports[i]); } /** * Remove generated .di files on error and exit */ void removeHdrFilesAndFail(ref Param params, ref Modules modules) nothrow { if (params.doHdrGeneration) { foreach (m; modules) { if (m.filetype == FileType.dhdr) continue; File.remove(m.hdrfile.toChars()); } } fatal(); } /** * Converts a chain of identifiers to the filename of the module * * Params: * packages = the names of the "parent" packages * ident = the name of the child package or module * * Returns: * the filename of the child package or module */ private const(char)[] getFilename(Identifier[] packages, Identifier ident) nothrow { const(char)[] filename = ident.toString(); if (packages.length == 0) return filename; OutBuffer buf; OutBuffer dotmods; auto modAliases = &global.params.modFileAliasStrings; void checkModFileAlias(const(char)[] p) { /* Check and replace the contents of buf[] with * an alias string from global.params.modFileAliasStrings[] */ dotmods.writestring(p); foreach_reverse (const m; *modAliases) { const q = strchr(m, '='); assert(q); if (dotmods.length == q - m && memcmp(dotmods.peekChars(), m, q - m) == 0) { buf.setsize(0); auto rhs = q[1 .. strlen(q)]; if (rhs.length > 0 && (rhs[$ - 1] == '/' || rhs[$ - 1] == '\\')) rhs = rhs[0 .. $ - 1]; // remove trailing separator buf.writestring(rhs); break; // last matching entry in ms[] wins } } dotmods.writeByte('.'); } foreach (pid; packages) { const p = pid.toString(); buf.writestring(p); if (modAliases.dim) checkModFileAlias(p); version (Windows) enum FileSeparator = '\\'; else enum FileSeparator = '/'; buf.writeByte(FileSeparator); } buf.writestring(filename); if (modAliases.dim) checkModFileAlias(filename); buf.writeByte(0); filename = buf.extractSlice()[0 .. $ - 1]; return filename; } /*********************************************************** */ extern (C++) class Package : ScopeDsymbol { PKG isPkgMod = PKG.unknown; uint tag; // auto incremented tag, used to mask package tree in scopes Module mod; // !=null if isPkgMod == PKG.module_ final extern (D) this(const ref Loc loc, Identifier ident) nothrow { super(loc, ident); __gshared uint packageTag; this.tag = packageTag++; } override const(char)* kind() const nothrow { return "package"; } override bool equals(const RootObject o) const { // custom 'equals' for bug 17441. "package a" and "module a" are not equal if (this == o) return true; auto p = cast(Package)o; return p && isModule() == p.isModule() && ident.equals(p.ident); } /**************************************************** * Input: * packages[] the pkg1.pkg2 of pkg1.pkg2.mod * Returns: * the symbol table that mod should be inserted into * Output: * *pparent the rightmost package, i.e. pkg2, or NULL if no packages * *ppkg the leftmost package, i.e. pkg1, or NULL if no packages */ extern (D) static DsymbolTable resolve(Identifier[] packages, Dsymbol* pparent, Package* ppkg) { DsymbolTable dst = Module.modules; Dsymbol parent = null; //printf("Package::resolve()\n"); if (ppkg) *ppkg = null; foreach (pid; packages) { Package pkg; Dsymbol p = dst.lookup(pid); if (!p) { pkg = new Package(Loc.initial, pid); dst.insert(pkg); pkg.parent = parent; pkg.symtab = new DsymbolTable(); } else { pkg = p.isPackage(); assert(pkg); // It might already be a module, not a package, but that needs // to be checked at a higher level, where a nice error message // can be generated. // dot net needs modules and packages with same name // But we still need a symbol table for it if (!pkg.symtab) pkg.symtab = new DsymbolTable(); } parent = pkg; dst = pkg.symtab; if (ppkg && !*ppkg) *ppkg = pkg; if (pkg.isModule()) { // Return the module so that a nice error message can be generated if (ppkg) *ppkg = cast(Package)p; break; } } if (pparent) *pparent = parent; return dst; } override final inout(Package) isPackage() inout { return this; } /** * Checks if pkg is a sub-package of this * * For example, if this qualifies to 'a1.a2' and pkg - to 'a1.a2.a3', * this function returns 'true'. If it is other way around or qualified * package paths conflict function returns 'false'. * * Params: * pkg = possible subpackage * * Returns: * see description */ final bool isAncestorPackageOf(const Package pkg) const { if (this == pkg) return true; if (!pkg || !pkg.parent) return false; return isAncestorPackageOf(pkg.parent.isPackage()); } override Dsymbol search(const ref Loc loc, Identifier ident, int flags = SearchLocalsOnly) { //printf("%s Package.search('%s', flags = x%x)\n", toChars(), ident.toChars(), flags); flags &= ~SearchLocalsOnly; // searching an import is always transitive if (!isModule() && mod) { // Prefer full package name. Dsymbol s = symtab ? symtab.lookup(ident) : null; if (s) return s; //printf("[%s] through pkdmod: %s\n", loc.toChars(), toChars()); return mod.search(loc, ident, flags); } return ScopeDsymbol.search(loc, ident, flags); } override void accept(Visitor v) { v.visit(this); } final Module isPackageMod() { if (isPkgMod == PKG.module_) { return mod; } return null; } /** * Checks for the existence of a package.d to set isPkgMod appropriately * if isPkgMod == PKG.unknown */ final void resolvePKGunknown() { if (isModule()) return; if (isPkgMod != PKG.unknown) return; Identifier[] packages; for (Dsymbol s = this.parent; s; s = s.parent) packages ~= s.ident; reverse(packages); if (FileManager.lookForSourceFile(getFilename(packages, ident), global.path ? (*global.path)[] : null)) Module.load(Loc.initial, packages, this.ident); else isPkgMod = PKG.package_; } } /*********************************************************** */ extern (C++) final class Module : Package { extern (C++) __gshared Module rootModule; extern (C++) __gshared DsymbolTable modules; // symbol table of all modules extern (C++) __gshared Modules amodules; // array of all modules extern (C++) __gshared Dsymbols deferred; // deferred Dsymbol's needing semantic() run on them extern (C++) __gshared Dsymbols deferred2; // deferred Dsymbol's needing semantic2() run on them extern (C++) __gshared Dsymbols deferred3; // deferred Dsymbol's needing semantic3() run on them extern (C++) __gshared uint dprogress; // progress resolving the deferred list static void _init() { modules = new DsymbolTable(); } /** * Deinitializes the global state of the compiler. * * This can be used to restore the state set by `_init` to its original * state. */ static void deinitialize() { modules = modules.init; } extern (C++) __gshared AggregateDeclaration moduleinfo; const(char)[] arg; // original argument name ModuleDeclaration* md; // if !=null, the contents of the ModuleDeclaration declaration const FileName srcfile; // input source file const FileName objfile; // output .obj file const FileName hdrfile; // 'header' file FileName docfile; // output documentation file const(ubyte)[] src; /// Raw content of the file uint errors; // if any errors in file uint numlines; // number of lines in source file FileType filetype; // source file type bool hasAlwaysInlines; // contains references to functions that must be inlined bool isPackageFile; // if it is a package.d Package pkg; // if isPackageFile is true, the Package that contains this package.d Strings contentImportedFiles; // array of files whose content was imported int needmoduleinfo; int selfimports; // 0: don't know, 1: does not, 2: does Dsymbol[void*] tagSymTab; /// ImportC: tag symbols that conflict with other symbols used as the index /************************************* * Return true if module imports itself. */ bool selfImports() { //printf("Module::selfImports() %s\n", toChars()); if (selfimports == 0) { foreach (Module m; amodules) m.insearch = 0; selfimports = imports(this) + 1; foreach (Module m; amodules) m.insearch = 0; } return selfimports == 2; } int rootimports; // 0: don't know, 1: does not, 2: does /************************************* * Return true if module imports root module. */ bool rootImports() { //printf("Module::rootImports() %s\n", toChars()); if (rootimports == 0) { foreach (Module m; amodules) m.insearch = 0; rootimports = 1; foreach (Module m; amodules) { if (m.isRoot() && imports(m)) { rootimports = 2; break; } } foreach (Module m; amodules) m.insearch = 0; } return rootimports == 2; } int insearch; Identifier searchCacheIdent; Dsymbol searchCacheSymbol; // cached value of search int searchCacheFlags; // cached flags /** * A root module is one that will be compiled all the way to * object code. This field holds the root module that caused * this module to be loaded. If this module is a root module, * then it will be set to `this`. This is used to determine * ownership of template instantiation. */ Module importedFrom; Dsymbols* decldefs; // top level declarations for this Module Modules aimports; // all imported modules uint debuglevel; // debug level Identifiers* debugids; // debug identifiers Identifiers* debugidsNot; // forward referenced debug identifiers uint versionlevel; // version level Identifiers* versionids; // version identifiers Identifiers* versionidsNot; // forward referenced version identifiers MacroTable macrotable; // document comment macros Escape* _escapetable; // document comment escapes size_t nameoffset; // offset of module name from start of ModuleInfo size_t namelen; // length of module name in characters extern (D) this(const ref Loc loc, const(char)[] filename, Identifier ident, int doDocComment, int doHdrGen) { super(loc, ident); const(char)[] srcfilename; //printf("Module::Module(filename = '%.*s', ident = '%s')\n", cast(int)filename.length, filename.ptr, ident.toChars()); this.arg = filename; srcfilename = FileName.defaultExt(filename, mars_ext); if (target.run_noext && global.params.run && !FileName.ext(filename) && FileName.exists(srcfilename) == 0 && FileName.exists(filename) == 1) { FileName.free(srcfilename.ptr); srcfilename = FileName.removeExt(filename); // just does a mem.strdup(filename) } else if (!FileName.equalsExt(srcfilename, mars_ext) && !FileName.equalsExt(srcfilename, hdr_ext) && !FileName.equalsExt(srcfilename, c_ext) && !FileName.equalsExt(srcfilename, i_ext) && !FileName.equalsExt(srcfilename, dd_ext)) { error("source file name '%.*s' must have .%.*s extension", cast(int)srcfilename.length, srcfilename.ptr, cast(int)mars_ext.length, mars_ext.ptr); fatal(); } srcfile = FileName(srcfilename); objfile = setOutfilename(global.params.objname, global.params.objdir, filename, target.obj_ext); if (doDocComment) setDocfile(); if (doHdrGen) hdrfile = setOutfilename(global.params.hdrname, global.params.hdrdir, arg, hdr_ext); } extern (D) this(const(char)[] filename, Identifier ident, int doDocComment, int doHdrGen) { this(Loc.initial, filename, ident, doDocComment, doHdrGen); } static Module create(const(char)* filename, Identifier ident, int doDocComment, int doHdrGen) { return create(filename.toDString, ident, doDocComment, doHdrGen); } extern (D) static Module create(const(char)[] filename, Identifier ident, int doDocComment, int doHdrGen) { return new Module(Loc.initial, filename, ident, doDocComment, doHdrGen); } extern (C++) static Module load(const ref Loc loc, Identifiers* packages, Identifier ident) { return load(loc, packages ? (*packages)[] : null, ident); } extern (D) static Module load(const ref Loc loc, Identifier[] packages, Identifier ident) { //printf("Module::load(ident = '%s')\n", ident.toChars()); // Build module filename by turning: // foo.bar.baz // into: // foo\bar\baz const(char)[] filename = getFilename(packages, ident); // Look for the source file if (const result = FileManager.lookForSourceFile(filename, global.path ? (*global.path)[] : null)) filename = result; // leaks auto m = new Module(loc, filename, ident, 0, 0); if (!m.read(loc)) return null; if (global.params.verbose) { OutBuffer buf; foreach (pid; packages) { buf.writestring(pid.toString()); buf.writeByte('.'); } buf.printf("%s\t(%s)", ident.toChars(), m.srcfile.toChars()); message("import %s", buf.peekChars()); } if((m = m.parse()) is null) return null; return m; } override const(char)* kind() const { return "module"; } /********************************************* * Combines things into output file name for .html and .di files. * Input: * name Command line name given for the file, NULL if none * dir Command line directory given for the file, NULL if none * arg Name of the source file * ext File name extension to use if 'name' is NULL * global.params.preservePaths get output path from arg * srcfile Input file - output file name must not match input file */ extern(D) FileName setOutfilename(const(char)[] name, const(char)[] dir, const(char)[] arg, const(char)[] ext) { const(char)[] docfilename; if (name) { docfilename = name; } else { const(char)[] argdoc; OutBuffer buf; if (arg == "__stdin.d") { version (Posix) import core.sys.posix.unistd : getpid; else version (Windows) import core.sys.windows.winbase : getpid = GetCurrentProcessId; buf.printf("__stdin_%d.d", getpid()); arg = buf[]; } if (global.params.preservePaths) argdoc = arg; else argdoc = FileName.name(arg); // If argdoc doesn't have an absolute path, make it relative to dir if (!FileName.absolute(argdoc)) { //FileName::ensurePathExists(dir); argdoc = FileName.combine(dir, argdoc); } docfilename = FileName.forceExt(argdoc, ext); } if (FileName.equals(docfilename, srcfile.toString())) { error("source file and output file have same name '%s'", srcfile.toChars()); fatal(); } return FileName(docfilename); } extern (D) void setDocfile() { docfile = setOutfilename(global.params.docname, global.params.docdir, arg, doc_ext); } /** * Trigger the relevant semantic error when a file cannot be read * * We special case `object.d` as a failure is likely to be a rare * but difficult to diagnose case for the user. Packages also require * special handling to avoid exposing the compiler's internals. * * Params: * loc = The location at which the file read originated (e.g. import) */ private void onFileReadError(const ref Loc loc) { if (FileName.equals(srcfile.toString(), "object.d")) { .error(loc, "cannot find source code for runtime library file 'object.d'"); errorSupplemental(loc, "dmd might not be correctly installed. Run 'dmd -man' for installation instructions."); const dmdConfFile = global.inifilename.length ? FileName.canonicalName(global.inifilename) : "not found"; errorSupplemental(loc, "config file: %.*s", cast(int)dmdConfFile.length, dmdConfFile.ptr); } else if (FileName.ext(this.arg) || !loc.isValid()) { // Modules whose original argument name has an extension, or do not // have a valid location come from the command-line. // Error that their file cannot be found and return early. .error(loc, "cannot find input file `%s`", srcfile.toChars()); } else { // if module is not named 'package' but we're trying to read 'package.d', we're looking for a package module bool isPackageMod = (strcmp(toChars(), "package") != 0) && (strcmp(srcfile.name(), package_d) == 0 || (strcmp(srcfile.name(), package_di) == 0)); if (isPackageMod) .error(loc, "importing package '%s' requires a 'package.d' file which cannot be found in '%s'", toChars(), srcfile.toChars()); else { .error(loc, "unable to read module `%s`", toChars()); const pkgfile = FileName.combine(FileName.removeExt(srcfile.toString()), package_d); .errorSupplemental(loc, "Expected '%s' or '%s' in one of the following import paths:", srcfile.toChars(), pkgfile.ptr); } } if (!global.gag) { /* Print path */ if (global.path) { foreach (i, p; *global.path) fprintf(stderr, "import path[%llu] = %s\n", cast(ulong)i, p); } else { fprintf(stderr, "Specify path to file '%s' with -I switch\n", srcfile.toChars()); } removeHdrFilesAndFail(global.params, Module.amodules); } } /** * Reads the file from `srcfile` and loads the source buffer. * * If makefile module dependency is requested, we add this module * to the list of dependencies from here. * * Params: * loc = the location * * Returns: `true` if successful */ bool read(const ref Loc loc) { if (this.src) return true; // already read //printf("Module::read('%s') file '%s'\n", toChars(), srcfile.toChars()); if (auto result = global.fileManager.lookup(srcfile)) { this.src = result; if (global.params.emitMakeDeps) global.params.makeDeps.push(srcfile.toChars()); return true; } this.onFileReadError(loc); return false; } /// syntactic parse Module parse() { return parseModule!ASTCodegen(); } /// ditto extern (D) Module parseModule(AST)() { enum Endian { little, big} enum SourceEncoding { utf16, utf32} /* * Convert a buffer from UTF32 to UTF8 * Params: * Endian = is the buffer big/little endian * buf = buffer of UTF32 data * Returns: * input buffer reencoded as UTF8 */ char[] UTF32ToUTF8(Endian endian)(const(char)[] buf) { static if (endian == Endian.little) alias readNext = Port.readlongLE; else alias readNext = Port.readlongBE; if (buf.length & 3) { error("odd length of UTF-32 char source %llu", cast(ulong) buf.length); return null; } const (uint)[] eBuf = cast(const(uint)[])buf; OutBuffer dbuf; dbuf.reserve(eBuf.length); foreach (i; 0 .. eBuf.length) { const u = readNext(&eBuf[i]); if (u & ~0x7F) { if (u > 0x10FFFF) { error("UTF-32 value %08x greater than 0x10FFFF", u); return null; } dbuf.writeUTF8(u); } else dbuf.writeByte(u); } dbuf.writeByte(0); //add null terminator return dbuf.extractSlice(); } /* * Convert a buffer from UTF16 to UTF8 * Params: * Endian = is the buffer big/little endian * buf = buffer of UTF16 data * Returns: * input buffer reencoded as UTF8 */ char[] UTF16ToUTF8(Endian endian)(const(char)[] buf) { static if (endian == Endian.little) alias readNext = Port.readwordLE; else alias readNext = Port.readwordBE; if (buf.length & 1) { error("odd length of UTF-16 char source %llu", cast(ulong) buf.length); return null; } const (ushort)[] eBuf = cast(const(ushort)[])buf; OutBuffer dbuf; dbuf.reserve(eBuf.length); //i will be incremented in the loop for high codepoints foreach (ref i; 0 .. eBuf.length) { uint u = readNext(&eBuf[i]); if (u & ~0x7F) { if (0xD800 <= u && u < 0xDC00) { i++; if (i >= eBuf.length) { error("surrogate UTF-16 high value %04x at end of file", u); return null; } const u2 = readNext(&eBuf[i]); if (u2 < 0xDC00 || 0xE000 <= u2) { error("surrogate UTF-16 low value %04x out of range", u2); return null; } u = (u - 0xD7C0) << 10; u |= (u2 - 0xDC00); } else if (u >= 0xDC00 && u <= 0xDFFF) { error("unpaired surrogate UTF-16 value %04x", u); return null; } else if (u == 0xFFFE || u == 0xFFFF) { error("illegal UTF-16 value %04x", u); return null; } dbuf.writeUTF8(u); } else dbuf.writeByte(u); } dbuf.writeByte(0); //add a terminating null byte return dbuf.extractSlice(); } const(char)* srcname = srcfile.toChars(); //printf("Module::parse(srcname = '%s')\n", srcname); isPackageFile = (strcmp(srcfile.name(), package_d) == 0 || strcmp(srcfile.name(), package_di) == 0); const(char)[] buf = cast(const(char)[]) this.src; bool needsReencoding = true; bool hasBOM = true; //assume there's a BOM Endian endian; SourceEncoding sourceEncoding; if (buf.length >= 2) { /* Convert all non-UTF-8 formats to UTF-8. * BOM : https://www.unicode.org/faq/utf_bom.html * 00 00 FE FF UTF-32BE, big-endian * FF FE 00 00 UTF-32LE, little-endian * FE FF UTF-16BE, big-endian * FF FE UTF-16LE, little-endian * EF BB BF UTF-8 */ if (buf[0] == 0xFF && buf[1] == 0xFE) { endian = Endian.little; sourceEncoding = buf.length >= 4 && buf[2] == 0 && buf[3] == 0 ? SourceEncoding.utf32 : SourceEncoding.utf16; } else if (buf[0] == 0xFE && buf[1] == 0xFF) { endian = Endian.big; sourceEncoding = SourceEncoding.utf16; } else if (buf.length >= 4 && buf[0] == 0 && buf[1] == 0 && buf[2] == 0xFE && buf[3] == 0xFF) { endian = Endian.big; sourceEncoding = SourceEncoding.utf32; } else if (buf.length >= 3 && buf[0] == 0xEF && buf[1] == 0xBB && buf[2] == 0xBF) { needsReencoding = false;//utf8 with BOM } else { /* There is no BOM. Make use of Arcane Jill's insight that * the first char of D source must be ASCII to * figure out the encoding. */ hasBOM = false; if (buf.length >= 4 && buf[1] == 0 && buf[2] == 0 && buf[3] == 0) { endian = Endian.little; sourceEncoding = SourceEncoding.utf32; } else if (buf.length >= 4 && buf[0] == 0 && buf[1] == 0 && buf[2] == 0) { endian = Endian.big; sourceEncoding = SourceEncoding.utf32; } else if (buf.length >= 2 && buf[1] == 0) //try to check for UTF-16 { endian = Endian.little; sourceEncoding = SourceEncoding.utf16; } else if (buf[0] == 0) { endian = Endian.big; sourceEncoding = SourceEncoding.utf16; } else { // It's UTF-8 needsReencoding = false; if (buf[0] >= 0x80) { error("source file must start with BOM or ASCII character, not \\x%02X", buf[0]); return null; } } } //throw away BOM if (hasBOM) { if (!needsReencoding) buf = buf[3..$];// utf-8 already else if (sourceEncoding == SourceEncoding.utf32) buf = buf[4..$]; else buf = buf[2..$]; //utf 16 } } // Assume the buffer is from memory and has not be read from disk. Assume UTF-8. else if (buf.length >= 1 && (buf[0] == '\0' || buf[0] == 0x1A)) needsReencoding = false; //printf("%s, %d, %d, %d\n", srcfile.name.toChars(), needsReencoding, endian == Endian.little, sourceEncoding == SourceEncoding.utf16); if (needsReencoding) { if (sourceEncoding == SourceEncoding.utf16) { buf = endian == Endian.little ? UTF16ToUTF8!(Endian.little)(buf) : UTF16ToUTF8!(Endian.big)(buf); } else { buf = endian == Endian.little ? UTF32ToUTF8!(Endian.little)(buf) : UTF32ToUTF8!(Endian.big)(buf); } // an error happened on UTF conversion if (buf is null) return null; } /* If it starts with the string "Ddoc", then it's a documentation * source file. */ if (buf.length>= 4 && buf[0..4] == "Ddoc") { comment = buf.ptr + 4; filetype = FileType.ddoc; if (!docfile) setDocfile(); return this; } /* If it has the extension ".dd", it is also a documentation * source file. Documentation source files may begin with "Ddoc" * but do not have to if they have the .dd extension. * https://issues.dlang.org/show_bug.cgi?id=15465 */ if (FileName.equalsExt(arg, dd_ext)) { comment = buf.ptr; // the optional Ddoc, if present, is handled above. filetype = FileType.ddoc; if (!docfile) setDocfile(); return this; } /* If it has the extension ".di", it is a "header" file. */ if (FileName.equalsExt(arg, hdr_ext)) filetype = FileType.dhdr; /// Promote `this` to a root module if requested via `-i` void checkCompiledImport() { if (!this.isRoot() && Compiler.onImport(this)) this.importedFrom = this; } DsymbolTable dst; Package ppack = null; /* If it has the extension ".c", it is a "C" file. * If it has the extension ".i", it is a preprocessed "C" file. */ if (FileName.equalsExt(arg, c_ext) || FileName.equalsExt(arg, i_ext)) { filetype = FileType.c; scope p = new CParser!AST(this, buf, cast(bool) docfile, target.c); p.nextToken(); checkCompiledImport(); members = p.parseModule(); assert(!p.md); // C doesn't have module declarations numlines = p.scanloc.linnum; } else { scope p = new Parser!AST(this, buf, cast(bool) docfile); p.nextToken(); p.parseModuleDeclaration(); md = p.md; if (md) { /* A ModuleDeclaration, md, was provided. * The ModuleDeclaration sets the packages this module appears in, and * the name of this module. */ this.ident = md.id; dst = Package.resolve(md.packages, &this.parent, &ppack); } // Done after parsing the module header because `module x.y.z` may override the file name checkCompiledImport(); members = p.parseModuleContent(); numlines = p.scanloc.linnum; } /* The symbol table into which the module is to be inserted. */ if (md) { // Mark the package path as accessible from the current module // https://issues.dlang.org/show_bug.cgi?id=21661 // Code taken from Import.addPackageAccess() if (md.packages.length > 0) { // module a.b.c.d; auto p = ppack; // a addAccessiblePackage(p, Visibility(Visibility.Kind.private_)); foreach (id; md.packages[1 .. $]) // [b, c] { p = cast(Package) p.symtab.lookup(id); if (p is null) break; addAccessiblePackage(p, Visibility(Visibility.Kind.private_)); } } assert(dst); Module m = ppack ? ppack.isModule() : null; if (m && (strcmp(m.srcfile.name(), package_d) != 0 && strcmp(m.srcfile.name(), package_di) != 0)) { .error(md.loc, "package name '%s' conflicts with usage as a module name in file %s", ppack.toPrettyChars(), m.srcfile.toChars()); } } else { /* The name of the module is set to the source file name. * There are no packages. */ dst = modules; // and so this module goes into global module symbol table /* Check to see if module name is a valid identifier */ if (!Identifier.isValidIdentifier(this.ident.toChars())) error("has non-identifier characters in filename, use module declaration instead"); } // Insert module into the symbol table Dsymbol s = this; if (isPackageFile) { /* If the source tree is as follows: * pkg/ * +- package.d * +- common.d * the 'pkg' will be incorporated to the internal package tree in two ways: * import pkg; * and: * import pkg.common; * * If both are used in one compilation, 'pkg' as a module (== pkg/package.d) * and a package name 'pkg' will conflict each other. * * To avoid the conflict: * 1. If preceding package name insertion had occurred by Package::resolve, * reuse the previous wrapping 'Package' if it exists * 2. Otherwise, 'package.d' wrapped by 'Package' is inserted to the internal tree in here. * * Then change Package::isPkgMod to PKG.module_ and set Package::mod. * * Note that the 'wrapping Package' is the Package that contains package.d and other submodules, * the one inserted to the symbol table. */ auto ps = dst.lookup(ident); Package p = ps ? ps.isPackage() : null; if (p is null) { p = new Package(Loc.initial, ident); p.tag = this.tag; // reuse the same package tag p.symtab = new DsymbolTable(); } this.tag = p.tag; // reuse the 'older' package tag this.pkg = p; p.parent = this.parent; p.isPkgMod = PKG.module_; p.mod = this; s = p; } if (!dst.insert(s)) { /* It conflicts with a name that is already in the symbol table. * Figure out what went wrong, and issue error message. */ Dsymbol prev = dst.lookup(ident); assert(prev); if (Module mprev = prev.isModule()) { if (!FileName.equals(srcname, mprev.srcfile.toChars())) error(loc, "from file %s conflicts with another module %s from file %s", srcname, mprev.toChars(), mprev.srcfile.toChars()); else if (isRoot() && mprev.isRoot()) error(loc, "from file %s is specified twice on the command line", srcname); else error(loc, "from file %s must be imported with 'import %s;'", srcname, toPrettyChars()); // https://issues.dlang.org/show_bug.cgi?id=14446 // Return previously parsed module to avoid AST duplication ICE. return mprev; } else if (Package pkg = prev.isPackage()) { // 'package.d' loaded after a previous 'Package' insertion if (isPackageFile) amodules.push(this); // Add to global array of all modules else error(md ? md.loc : loc, "from file %s conflicts with package name %s", srcname, pkg.toChars()); } else assert(global.errors); } else { // Add to global array of all modules amodules.push(this); } Compiler.onParseModule(this); return this; } override void importAll(Scope* prevsc) { //printf("+Module::importAll(this = %p, '%s'): parent = %p\n", this, toChars(), parent); if (_scope) return; // already done if (filetype == FileType.ddoc) { error("is a Ddoc file, cannot import it"); return; } /* Note that modules get their own scope, from scratch. * This is so regardless of where in the syntax a module * gets imported, it is unaffected by context. * Ignore prevsc. */ Scope* sc = Scope.createGlobal(this); // create root scope if (md && md.msg) md.msg = semanticString(sc, md.msg, "deprecation message"); // Add import of "object", even for the "object" module. // If it isn't there, some compiler rewrites, like // classinst == classinst -> .object.opEquals(classinst, classinst) // would fail inside object.d. if (filetype != FileType.c && (members.dim == 0 || (*members)[0].ident != Id.object || (*members)[0].isImport() is null)) { auto im = new Import(Loc.initial, null, Id.object, null, 0); members.shift(im); } if (!symtab) { // Add all symbols into module's symbol table symtab = new DsymbolTable(); for (size_t i = 0; i < members.dim; i++) { Dsymbol s = (*members)[i]; s.addMember(sc, sc.scopesym); } } // anything else should be run after addMember, so version/debug symbols are defined /* Set scope for the symbols so that if we forward reference * a symbol, it can possibly be resolved on the spot. * If this works out well, it can be extended to all modules * before any semantic() on any of them. */ setScope(sc); // remember module scope for semantic for (size_t i = 0; i < members.dim; i++) { Dsymbol s = (*members)[i]; s.setScope(sc); } for (size_t i = 0; i < members.dim; i++) { Dsymbol s = (*members)[i]; s.importAll(sc); } sc = sc.pop(); sc.pop(); // 2 pops because Scope.createGlobal() created 2 } /********************************** * Determine if we need to generate an instance of ModuleInfo * for this Module. */ int needModuleInfo() { //printf("needModuleInfo() %s, %d, %d\n", toChars(), needmoduleinfo, global.params.cov); return needmoduleinfo || global.params.cov; } /******************************************* * Print deprecation warning if we're deprecated, when * this module is imported from scope sc. * * Params: * sc = the scope into which we are imported * loc = the location of the import statement */ void checkImportDeprecation(const ref Loc loc, Scope* sc) { if (md && md.isdeprecated && !sc.isDeprecated) { Expression msg = md.msg; if (StringExp se = msg ? msg.toStringExp() : null) { const slice = se.peekString(); if (slice.length) { deprecation(loc, "is deprecated - %.*s", cast(int)slice.length, slice.ptr); return; } } deprecation(loc, "is deprecated"); } } override Dsymbol search(const ref Loc loc, Identifier ident, int flags = SearchLocalsOnly) { /* Since modules can be circularly referenced, * need to stop infinite recursive searches. * This is done with the cache. */ //printf("%s Module.search('%s', flags = x%x) insearch = %d\n", toChars(), ident.toChars(), flags, insearch); if (insearch) return null; /* Qualified module searches always search their imports, * even if SearchLocalsOnly */ if (!(flags & SearchUnqualifiedModule)) flags &= ~(SearchUnqualifiedModule | SearchLocalsOnly); if (searchCacheIdent == ident && searchCacheFlags == flags) { //printf("%s Module::search('%s', flags = %d) insearch = %d searchCacheSymbol = %s\n", // toChars(), ident.toChars(), flags, insearch, searchCacheSymbol ? searchCacheSymbol.toChars() : "null"); return searchCacheSymbol; } uint errors = global.errors; insearch = 1; Dsymbol s = ScopeDsymbol.search(loc, ident, flags); insearch = 0; if (errors == global.errors) { // https://issues.dlang.org/show_bug.cgi?id=10752 // Can cache the result only when it does not cause // access error so the side-effect should be reproduced in later search. searchCacheIdent = ident; searchCacheSymbol = s; searchCacheFlags = flags; } return s; } override bool isPackageAccessible(Package p, Visibility visibility, int flags = 0) { if (insearch) // don't follow import cycles return false; insearch = true; scope (exit) insearch = false; if (flags & IgnorePrivateImports) visibility = Visibility(Visibility.Kind.public_); // only consider public imports return super.isPackageAccessible(p, visibility); } override Dsymbol symtabInsert(Dsymbol s) { searchCacheIdent = null; // symbol is inserted, so invalidate cache return Package.symtabInsert(s); } void deleteObjFile() { if (global.params.obj) File.remove(objfile.toChars()); if (docfile) File.remove(docfile.toChars()); } /******************************************* * Can't run semantic on s now, try again later. */ extern (D) static void addDeferredSemantic(Dsymbol s) { //printf("Module::addDeferredSemantic('%s')\n", s.toChars()); deferred.push(s); } extern (D) static void addDeferredSemantic2(Dsymbol s) { //printf("Module::addDeferredSemantic2('%s')\n", s.toChars()); deferred2.push(s); } extern (D) static void addDeferredSemantic3(Dsymbol s) { //printf("Module::addDeferredSemantic3('%s')\n", s.toChars()); deferred3.push(s); } /****************************************** * Run semantic() on deferred symbols. */ static void runDeferredSemantic() { if (dprogress == 0) return; __gshared int nested; if (nested) return; //if (deferred.dim) printf("+Module::runDeferredSemantic(), len = %d\n", deferred.dim); nested++; size_t len; do { dprogress = 0; len = deferred.dim; if (!len) break; Dsymbol* todo; Dsymbol* todoalloc = null; Dsymbol tmp; if (len == 1) { todo = &tmp; } else { todo = cast(Dsymbol*)Mem.check(malloc(len * Dsymbol.sizeof)); todoalloc = todo; } memcpy(todo, deferred.tdata(), len * Dsymbol.sizeof); deferred.setDim(0); foreach (i; 0..len) { Dsymbol s = todo[i]; s.dsymbolSemantic(null); //printf("deferred: %s, parent = %s\n", s.toChars(), s.parent.toChars()); } //printf("\tdeferred.dim = %d, len = %d, dprogress = %d\n", deferred.dim, len, dprogress); if (todoalloc) free(todoalloc); } while (deferred.dim < len || dprogress); // while making progress nested--; //printf("-Module::runDeferredSemantic(), len = %d\n", deferred.dim); } static void runDeferredSemantic2() { Module.runDeferredSemantic(); Dsymbols* a = &Module.deferred2; for (size_t i = 0; i < a.dim; i++) { Dsymbol s = (*a)[i]; //printf("[%d] %s semantic2a\n", i, s.toPrettyChars()); s.semantic2(null); if (global.errors) break; } a.setDim(0); } static void runDeferredSemantic3() { Module.runDeferredSemantic2(); Dsymbols* a = &Module.deferred3; for (size_t i = 0; i < a.dim; i++) { Dsymbol s = (*a)[i]; //printf("[%d] %s semantic3a\n", i, s.toPrettyChars()); s.semantic3(null); if (global.errors) break; } a.setDim(0); } extern (D) static void clearCache() nothrow { foreach (Module m; amodules) m.searchCacheIdent = null; } /************************************ * Recursively look at every module this module imports, * return true if it imports m. * Can be used to detect circular imports. */ int imports(Module m) nothrow { //printf("%s Module::imports(%s)\n", toChars(), m.toChars()); version (none) { foreach (i, Module mi; aimports) printf("\t[%d] %s\n", cast(int) i, mi.toChars()); } foreach (Module mi; aimports) { if (mi == m) return true; if (!mi.insearch) { mi.insearch = 1; int r = mi.imports(m); if (r) return r; } } return false; } bool isRoot() nothrow { return this.importedFrom == this; } // true if the module source file is directly // listed in command line. bool isCoreModule(Identifier ident) nothrow { return this.ident == ident && parent && parent.ident == Id.core && !parent.parent; } // Back end int doppelganger; // sub-module Symbol* cov; // private uint[] __coverage; uint* covb; // bit array of valid code line numbers Symbol* sictor; // module order independent constructor Symbol* sctor; // module constructor Symbol* sdtor; // module destructor Symbol* ssharedctor; // module shared constructor Symbol* sshareddtor; // module shared destructor Symbol* stest; // module unit test Symbol* sfilename; // symbol for filename uint[uint] ctfe_cov; /// coverage information from ctfe execution_count[line] override inout(Module) isModule() inout nothrow { return this; } override void accept(Visitor v) { v.visit(this); } /*********************************************** * Writes this module's fully-qualified name to buf * Params: * buf = The buffer to write to */ void fullyQualifiedName(ref OutBuffer buf) nothrow { buf.writestring(ident.toString()); for (auto package_ = parent; package_ !is null; package_ = package_.parent) { buf.prependstring("."); buf.prependstring(package_.ident.toChars()); } } /** Lazily initializes and returns the escape table. Turns out it eats a lot of memory. */ extern(D) Escape* escapetable() nothrow { if (!_escapetable) _escapetable = new Escape(); return _escapetable; } } /*********************************************************** */ extern (C++) struct ModuleDeclaration { Loc loc; Identifier id; Identifier[] packages; // array of Identifier's representing packages bool isdeprecated; // if it is a deprecated module Expression msg; extern (D) this(const ref Loc loc, Identifier[] packages, Identifier id, Expression msg, bool isdeprecated) { this.loc = loc; this.packages = packages; this.id = id; this.msg = msg; this.isdeprecated = isdeprecated; } extern (C++) const(char)* toChars() const { OutBuffer buf; foreach (pid; packages) { buf.writestring(pid.toString()); buf.writeByte('.'); } buf.writestring(id.toString()); return buf.extractChars(); } /// Provide a human readable representation extern (D) const(char)[] toString() const { return this.toChars().toDString; } }