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dmodule.d
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dmodule.d
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/**
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
*
* Copyright: Copyright (C) 1999-2018 by The D Language Foundation, All Rights Reserved
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
* License: $(LINK2 http://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.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.globals;
import dmd.id;
import dmd.identifier;
import dmd.parse;
import dmd.root.file;
import dmd.root.filename;
import dmd.root.outbuffer;
import dmd.root.port;
import dmd.semantic2;
import dmd.semantic3;
import dmd.utils;
import dmd.visitor;
version(Windows) {
extern (C) char* getcwd(char* buffer, size_t maxlen);
} else {
import core.sys.posix.unistd : getcwd;
}
/* =========================== ===================== */
/********************************************
* Look for the source file if it's different from filename.
* Look for .di, .d, directory, and along global.path.
* Does not open the file.
* Input:
* filename as supplied by the user
* global.path
* Returns:
* NULL if it's not different from filename.
*/
private const(char)[] lookForSourceFile(const(char)[] filename)
{
/* Search along global.path for .di file, then .d file.
*/
const sdi = FileName.forceExt(filename, global.hdr_ext.toDString());
if (FileName.exists(sdi) == 1)
return sdi;
const sd = FileName.forceExt(filename, global.mars_ext.toDString());
if (FileName.exists(sd) == 1)
return sd;
if (FileName.exists(filename) == 2)
{
/* The filename exists and it's a directory.
* Therefore, the result should be: filename/package.d
* iff filename/package.d is a file
*/
const ni = FileName.combine(filename, "package.di");
if (FileName.exists(ni) == 1)
return ni;
FileName.free(ni.ptr);
const n = FileName.combine(filename, "package.d");
if (FileName.exists(n) == 1)
return n;
FileName.free(n.ptr);
}
if (FileName.absolute(filename))
return null;
if (!global.path)
return null;
for (size_t i = 0; i < global.path.dim; i++)
{
const p = (*global.path)[i].toDString();
const(char)[] n = FileName.combine(p, sdi);
if (FileName.exists(n) == 1) {
return n;
}
FileName.free(n.ptr);
n = FileName.combine(p, sd);
if (FileName.exists(n) == 1) {
return n;
}
FileName.free(n.ptr);
const b = FileName.removeExt(filename);
n = FileName.combine(p, b);
FileName.free(b.ptr);
if (FileName.exists(n) == 2)
{
const n2i = FileName.combine(n, "package.di");
if (FileName.exists(n2i) == 1)
return n2i;
FileName.free(n2i.ptr);
const n2 = FileName.combine(n, "package.d");
if (FileName.exists(n2) == 1) {
return n2;
}
FileName.free(n2.ptr);
}
FileName.free(n.ptr);
}
return null;
}
// 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]);
}
enum PKG : int
{
unknown, // not yet determined whether it's a package.d or not
module_, // already determined that's an actual package.d
package_, // already determined that's an actual package
}
/***********************************************************
*/
extern (C++) class Package : ScopeDsymbol
{
PKG isPkgMod;
uint tag; // auto incremented tag, used to mask package tree in scopes
Module mod; // !=null if isPkgMod == PKG.module_
final extern (D) this(Identifier ident)
{
super(ident);
this.isPkgMod = PKG.unknown;
__gshared uint packageTag;
this.tag = packageTag++;
}
override const(char)* kind() const
{
return "package";
}
/****************************************************
* 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(Identifiers* packages, Dsymbol* pparent, Package* ppkg)
{
DsymbolTable dst = Module.modules;
Dsymbol parent = null;
//printf("Package::resolve()\n");
if (ppkg)
*ppkg = null;
if (packages)
{
for (size_t i = 0; i < packages.dim; i++)
{
Identifier pid = (*packages)[i];
Package pkg;
Dsymbol p = dst.lookup(pid);
if (!p)
{
pkg = new Package(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;
}
}
/***********************************************************
*/
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();
}
extern (C++) __gshared AggregateDeclaration moduleinfo;
const(char)* arg; // original argument name
ModuleDeclaration* md; // if !=null, the contents of the ModuleDeclaration declaration
File* srcfile; // input source file
File* objfile; // output .obj file
File* hdrfile; // 'header' file
File* docfile; // output documentation file
uint errors; // if any errors in file
uint numlines; // number of lines in source file
int isDocFile; // if it is a documentation input file, not D source
bool isPackageFile; // if it is a package.d
Strings contentImportedFiles; // array of files whose content was imported
int needmoduleinfo;
int selfimports; // 0: don't know, 1: does not, 2: does
/*************************************
* Return true if module imports itself.
*/
bool selfImports()
{
//printf("Module::selfImports() %s\n", toChars());
if (selfimports == 0)
{
for (size_t i = 0; i < amodules.dim; i++)
amodules[i].insearch = 0;
selfimports = imports(this) + 1;
for (size_t i = 0; i < amodules.dim; i++)
amodules[i].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)
{
for (size_t i = 0; i < amodules.dim; i++)
amodules[i].insearch = 0;
rootimports = 1;
for (size_t i = 0; i < amodules.dim; ++i)
{
Module m = amodules[i];
if (m.isRoot() && imports(m))
{
rootimports = 2;
break;
}
}
for (size_t i = 0; i < amodules.dim; i++)
amodules[i].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
Macro* 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(char)* filename, Identifier ident, int doDocComment, int doHdrGen)
{
super(ident);
const(char)* srcfilename;
//printf("Module::Module(filename = '%s', ident = '%s')\n", filename, ident.toChars());
this.arg = filename;
srcfilename = FileName.defaultExt(filename, global.mars_ext);
if (global.run_noext && global.params.run && !FileName.ext(filename) && FileName.exists(srcfilename) == 0 && FileName.exists(filename) == 1)
{
FileName.free(srcfilename);
srcfilename = FileName.removeExt(filename); // just does a mem.strdup(filename)
}
else if (!FileName.equalsExt(srcfilename, global.mars_ext) && !FileName.equalsExt(srcfilename, global.hdr_ext) && !FileName.equalsExt(srcfilename, "dd"))
{
error("source file name '%s' must have .%s extension", srcfilename, global.mars_ext);
fatal();
}
srcfile = new File(srcfilename);
objfile = setOutfile(global.params.objname, global.params.objdir, filename, global.obj_ext);
if (doDocComment)
setDocfile();
if (doHdrGen)
hdrfile = setOutfile(global.params.hdrname, global.params.hdrdir, arg, global.hdr_ext);
//objfile = new File(objfilename);
}
static Module create(const(char)* filename, Identifier ident, int doDocComment, int doHdrGen)
{
return new Module(filename, ident, doDocComment, doHdrGen);
}
static Module load(Loc loc, Identifiers* 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 = ident.toString();
if (packages && packages.dim)
{
OutBuffer buf;
OutBuffer dotmods;
auto ms = global.params.modFileAliasStrings;
const msdim = ms ? ms.dim : 0;
void checkModFileAlias(const(char)[] p)
{
/* Check and replace the contents of buf[] with
* an alias string from global.params.modFileAliasStrings[]
*/
dotmods.writestring(p);
Lmain:
for (size_t j = msdim; j--;)
{
const m = (*ms)[j];
const q = strchr(m, '=');
assert(q);
if (dotmods.offset == q - m && memcmp(dotmods.peekString(), m, q - m) == 0)
{
buf.reset();
auto qlen = strlen(q + 1);
if (qlen && (q[qlen] == '/' || q[qlen] == '\\'))
--qlen; // remove trailing separator
buf.writestring(q[1 .. qlen + 1]);
break Lmain; // last matching entry in ms[] wins
}
}
dotmods.writeByte('.');
}
foreach (pid; *packages)
{
const p = pid.toString();
buf.writestring(p);
if (msdim)
checkModFileAlias(p);
version (Windows)
{
buf.writeByte('\\');
}
else
{
buf.writeByte('/');
}
}
buf.writestring(filename);
if (msdim)
checkModFileAlias(filename);
buf.writeByte(0);
filename = buf.extractData().toDString();
}
auto m = new Module(filename.ptr, ident, 0, 0);
m.loc = loc;
/* Look for the source file
*/
if (const result = lookForSourceFile(filename))
m.srcfile = new File(result);
if (!m.read(loc))
return null;
if (global.params.verbose)
{
OutBuffer buf;
if (packages)
{
foreach (pid; *packages)
{
buf.writestring(pid.toString());
buf.writeByte('.');
}
}
buf.printf("%s\t(%s)", ident.toChars(), m.srcfile.toChars());
message("import %s", buf.peekString());
}
m = m.parse();
// Call onImport here because if the module is going to be compiled then we
// need to determine it early because it affects semantic analysis. This is
// being done after parsing the module so the full module name can be taken
// from whatever was declared in the file.
if (!m.isRoot() && Compiler.onImport(m))
{
m.importedFrom = m;
assert(m.isRoot());
}
Compiler.loadModule(m);
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
*/
File* setOutfile(const(char)* name, const(char)* dir, const(char)* arg, const(char)* ext)
{
return setOutfile(name.toDString(), dir.toDString(), arg.toDString(), ext.toDString());
}
/// Ditto
extern(D) File* setOutfile(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.windows : getpid = GetCurrentProcessId;
buf.printf("__stdin_%d.d", getpid());
arg = buf.peekSlice();
}
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.name.toString()))
{
error("source file and output file have same name '%s'", srcfile.name.toChars());
fatal();
}
return new File(docfilename);
}
void setDocfile()
{
docfile = setOutfile(global.params.docname, global.params.docdir, arg, global.doc_ext);
}
// read file, returns 'true' if succeed, 'false' otherwise.
bool read(Loc loc)
{
//printf("Module::read('%s') file '%s'\n", toChars(), srcfile.toChars());
if (!srcfile.read())
return true;
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 = FileName.canonicalName(global.inifilename);
errorSupplemental(loc, "config file: %s", dmdConfFile ? dmdConfFile : "not found".ptr);
}
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.name(), "package.d") == 0 || (strcmp(srcfile.name.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, "is in file '%s' which cannot be read", srcfile.toChars());
}
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());
fatal();
}
return false;
}
// syntactic parse
Module parse()
{
//printf("Module::parse(srcfile='%s') this=%p\n", srcfile.name.toChars(), this);
const(char)* srcname = srcfile.name.toChars();
//printf("Module::parse(srcname = '%s')\n", srcname);
isPackageFile = (strcmp(srcfile.name.name(), "package.d") == 0 ||
strcmp(srcfile.name.name(), "package.di") == 0);
char* buf = cast(char*)srcfile.buffer;
size_t buflen = srcfile.len;
if (buflen >= 2)
{
/* Convert all non-UTF-8 formats to UTF-8.
* BOM : http://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
*/
uint le;
uint bom = 1; // assume there's a BOM
if (buf[0] == 0xFF && buf[1] == 0xFE)
{
if (buflen >= 4 && buf[2] == 0 && buf[3] == 0)
{
// UTF-32LE
le = 1;
Lutf32:
OutBuffer dbuf;
uint* pu = cast(uint*)buf;
uint* pumax = &pu[buflen / 4];
if (buflen & 3)
{
error("odd length of UTF-32 char source %u", buflen);
fatal();
}
dbuf.reserve(buflen / 4);
for (pu += bom; pu < pumax; pu++)
{
uint u;
u = le ? Port.readlongLE(pu) : Port.readlongBE(pu);
if (u & ~0x7F)
{
if (u > 0x10FFFF)
{
error("UTF-32 value %08x greater than 0x10FFFF", u);
fatal();
}
dbuf.writeUTF8(u);
}
else
dbuf.writeByte(u);
}
dbuf.writeByte(0); // add 0 as sentinel for scanner
buflen = dbuf.offset - 1; // don't include sentinel in count
buf = dbuf.extractData();
}
else
{
// UTF-16LE (X86)
// Convert it to UTF-8
le = 1;
Lutf16:
OutBuffer dbuf;
ushort* pu = cast(ushort*)buf;
ushort* pumax = &pu[buflen / 2];
if (buflen & 1)
{
error("odd length of UTF-16 char source %u", buflen);
fatal();
}
dbuf.reserve(buflen / 2);
for (pu += bom; pu < pumax; pu++)
{
uint u;
u = le ? Port.readwordLE(pu) : Port.readwordBE(pu);
if (u & ~0x7F)
{
if (u >= 0xD800 && u <= 0xDBFF)
{
uint u2;
if (++pu > pumax)
{
error("surrogate UTF-16 high value %04x at end of file", u);
fatal();
}
u2 = le ? Port.readwordLE(pu) : Port.readwordBE(pu);
if (u2 < 0xDC00 || u2 > 0xDFFF)
{
error("surrogate UTF-16 low value %04x out of range", u2);
fatal();
}
u = (u - 0xD7C0) << 10;
u |= (u2 - 0xDC00);
}
else if (u >= 0xDC00 && u <= 0xDFFF)
{
error("unpaired surrogate UTF-16 value %04x", u);
fatal();
}
else if (u == 0xFFFE || u == 0xFFFF)
{
error("illegal UTF-16 value %04x", u);
fatal();
}
dbuf.writeUTF8(u);
}
else
dbuf.writeByte(u);
}
dbuf.writeByte(0); // add 0 as sentinel for scanner
buflen = dbuf.offset - 1; // don't include sentinel in count
buf = dbuf.extractData();
}
}
else if (buf[0] == 0xFE && buf[1] == 0xFF)
{
// UTF-16BE
le = 0;
goto Lutf16;
}
else if (buflen >= 4 && buf[0] == 0 && buf[1] == 0 && buf[2] == 0xFE && buf[3] == 0xFF)
{
// UTF-32BE
le = 0;
goto Lutf32;
}
else if (buflen >= 3 && buf[0] == 0xEF && buf[1] == 0xBB && buf[2] == 0xBF)
{
// UTF-8
buf += 3;
buflen -= 3;
}
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.
*/
bom = 0;
if (buflen >= 4)
{
if (buf[1] == 0 && buf[2] == 0 && buf[3] == 0)
{
// UTF-32LE
le = 1;
goto Lutf32;
}
else if (buf[0] == 0 && buf[1] == 0 && buf[2] == 0)
{
// UTF-32BE
le = 0;
goto Lutf32;
}
}
if (buflen >= 2)
{
if (buf[1] == 0)
{
// UTF-16LE
le = 1;
goto Lutf16;
}
else if (buf[0] == 0)
{
// UTF-16BE
le = 0;
goto Lutf16;
}
}
// It's UTF-8
if (buf[0] >= 0x80)
{
error("source file must start with BOM or ASCII character, not \\x%02X", buf[0]);
fatal();
}
}
}
/* If it starts with the string "Ddoc", then it's a documentation
* source file.
*/
if (buflen >= 4 && memcmp(buf, cast(char*)"Ddoc", 4) == 0)
{
comment = buf + 4;
isDocFile = 1;
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"))
{
comment = buf; // the optional Ddoc, if present, is handled above.
isDocFile = 1;
if (!docfile)
setDocfile();
return this;
}
{
scope p = new Parser!ASTCodegen(this, buf[0 .. buflen], docfile !is null);
p.nextToken();
members = p.parseModule();
md = p.md;
numlines = p.scanloc.linnum;
if (p.errors)
++global.errors;
}
if (srcfile._ref == 0)
.free(srcfile.buffer);
srcfile.buffer = null;
srcfile.len = 0;
/* The symbol table into which the module is to be inserted.
*/
DsymbolTable dst;
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;
Package ppack = null;
dst = Package.resolve(md.packages, &this.parent, &ppack);
assert(dst);
Module m = ppack ? ppack.isModule() : null;
if (m && (strcmp(m.srcfile.name.name(), "package.d") != 0 &&
strcmp(m.srcfile.name.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,
* later package.d loading will change Package::isPkgMod to PKG.module_ and set Package::mod.
* 2. Otherwise, 'package.d' wrapped by 'Package' is inserted to the internal tree in here.
*/
auto p = new Package(ident);
p.parent = this.parent;
p.isPkgMod = PKG.module_;
p.mod = this;
p.tag = this.tag; // reuse the same package tag
p.symtab = new DsymbolTable();
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())
{
if (pkg.isPkgMod == PKG.unknown && isPackageFile)
{
/* If the previous inserted Package is not yet determined as package.d,
* link it to the actual module.
*/
pkg.isPkgMod = PKG.module_;
pkg.mod = this;
pkg.tag = this.tag; // reuse the same package tag
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);
}
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 (isDocFile)
{
error("is a Ddoc file, cannot import it");
return;
}
if (md && md.msg)
{
if (StringExp se = md.msg.toStringExp())
md.msg = se;
else
md.msg.error("string expected, not '%s'", md.msg.toChars());
}
/* 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
// 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 (members.dim == 0 || (*members)[0].ident != Id.object)
{
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++)