}
}
-/* What kinds of symbol we could be parsing. */
-enum dlang_symbol_kinds
+/* Demangle information structure we pass around. */
+struct dlang_info
{
- /* Top-level symbol, needs it's type checked. */
- dlang_top_level,
- /* Function symbol, needs it's type checked. */
- dlang_function,
- /* Strongly typed name, such as for classes, structs and enums. */
- dlang_type_name,
- /* Template identifier. */
- dlang_template_ident,
- /* Template symbol parameter. */
- dlang_template_param
+ /* The string we are demangling. */
+ const char *s;
+ /* The index of the last back reference. */
+ int last_backref;
};
+/* Pass as the LEN to dlang_parse_template if symbol length is not known. */
+enum { TEMPLATE_LENGTH_UNKNOWN = -1 };
+
/* Prototypes for forward referenced functions */
-static const char *dlang_function_args (string *, const char *);
+static const char *dlang_function_type (string *, const char *,
+ struct dlang_info *);
-static const char *dlang_type (string *, const char *);
+static const char *dlang_function_args (string *, const char *,
+ struct dlang_info *);
+
+static const char *dlang_type (string *, const char *, struct dlang_info *);
static const char *dlang_value (string *, const char *, const char *, char);
static const char *dlang_parse_qualified (string *, const char *,
- enum dlang_symbol_kinds);
+ struct dlang_info *, int);
static const char *dlang_parse_mangle (string *, const char *,
- enum dlang_symbol_kinds);
+ struct dlang_info *);
+
+static const char *dlang_parse_tuple (string *, const char *,
+ struct dlang_info *);
-static const char *dlang_parse_tuple (string *, const char *);
+static const char *dlang_parse_template (string *, const char *,
+ struct dlang_info *, long);
-static const char *dlang_parse_template (string *, const char *, long);
+static const char *dlang_lname (string *, const char *, long);
/* Extract the number from MANGLED, and assign the result to RET.
}
}
+/* Extract the back reference position from MANGLED, and assign the result
+ to RET. Return the remaining string on success or NULL on failure. */
+static const char *
+dlang_decode_backref (const char *mangled, long *ret)
+{
+ /* Return NULL if trying to extract something that isn't a digit. */
+ if (mangled == NULL || !ISALPHA (*mangled))
+ return NULL;
+
+ /* Any identifier or non-basic type that has been emitted to the mangled
+ symbol before will not be emitted again, but is referenced by a special
+ sequence encoding the relative position of the original occurrence in the
+ mangled symbol name.
+
+ Numbers in back references are encoded with base 26 by upper case letters
+ A-Z for higher digits but lower case letters a-z for the last digit.
+
+ NumberBackRef:
+ [a-z]
+ [A-Z] NumberBackRef
+ ^
+ */
+ (*ret) = 0;
+
+ while (ISALPHA (*mangled))
+ {
+ (*ret) *= 26;
+
+ /* If an overflow occured when multiplying by 26, the result
+ will not be a multiple of 26. */
+ if ((*ret % 26) != 0)
+ return NULL;
+
+ if (mangled[0] >= 'a' && mangled[0] <= 'z')
+ {
+ (*ret) += mangled[0] - 'a';
+ return mangled + 1;
+ }
+
+ (*ret) += mangled[0] - 'A';
+ mangled++;
+ }
+
+ return NULL;
+}
+
+/* Extract the symbol pointed at by the back reference and assign the result
+ to RET. Return the remaining string on success or NULL on failure. */
+static const char *
+dlang_backref (const char *mangled, const char **ret, struct dlang_info *info)
+{
+ (*ret) = NULL;
+
+ if (mangled == NULL || *mangled != 'Q')
+ return NULL;
+
+ /* Position of 'Q'. */
+ const char *qpos = mangled;
+ long refpos;
+ mangled++;
+
+ mangled = dlang_decode_backref (mangled, &refpos);
+ if (mangled == NULL)
+ return NULL;
+
+ if (refpos <= 0 || refpos > qpos - info->s)
+ return NULL;
+
+ /* Set the position of the back reference. */
+ (*ret) = qpos - refpos;
+
+ return mangled;
+}
+
+/* Demangle a back referenced symbol from MANGLED and append it to DECL.
+ Return the remaining string on success or NULL on failure. */
+static const char *
+dlang_symbol_backref (string *decl, const char *mangled,
+ struct dlang_info *info)
+{
+ /* An identifier back reference always points to a digit 0 to 9.
+
+ IdentifierBackRef:
+ Q NumberBackRef
+ ^
+ */
+ const char *backref;
+ long len;
+
+ /* Get position of the back reference. */
+ mangled = dlang_backref (mangled, &backref, info);
+
+ /* Must point to a simple identifier. */
+ backref = dlang_number (backref, &len);
+ if (backref == NULL)
+ return NULL;
+
+ backref = dlang_lname (decl, backref, len);
+ if (backref == NULL)
+ return NULL;
+
+ return mangled;
+}
+
+/* Demangle a back referenced type from MANGLED and append it to DECL.
+ IS_FUNCTION is 1 if the back referenced type is expected to be a function.
+ Return the remaining string on success or NULL on failure. */
+static const char *
+dlang_type_backref (string *decl, const char *mangled, struct dlang_info *info,
+ int is_function)
+{
+ /* A type back reference always points to a letter.
+
+ TypeBackRef:
+ Q NumberBackRef
+ ^
+ */
+ const char *backref;
+
+ /* If we appear to be moving backwards through the mangle string, then
+ bail as this may be a recursive back reference. */
+ if (mangled - info->s >= info->last_backref)
+ return NULL;
+
+ int save_refpos = info->last_backref;
+ info->last_backref = mangled - info->s;
+
+ /* Get position of the back reference. */
+ mangled = dlang_backref (mangled, &backref, info);
+
+ /* Must point to a type. */
+ if (is_function)
+ backref = dlang_function_type (decl, backref, info);
+ else
+ backref = dlang_type (decl, backref, info);
+
+ info->last_backref = save_refpos;
+
+ if (backref == NULL)
+ return NULL;
+
+ return mangled;
+}
+
+/* Extract the beginning of a symbol name from MANGLED and
+ return 1 on success or 0 on failure. */
+static int
+dlang_symbol_name_p (const char *mangled, struct dlang_info *info)
+{
+ long ret;
+ const char *qref = mangled;
+
+ if (ISDIGIT (*mangled))
+ return 1;
+
+ if (mangled[0] == '_' && mangled[1] == '_'
+ && (mangled[2] == 'T' || mangled[2] == 'U'))
+ return 1;
+
+ if (*mangled != 'Q')
+ return 0;
+
+ mangled = dlang_decode_backref (mangled + 1, &ret);
+ if (mangled == NULL || ret <= 0 || ret > qref - info->s)
+ return 0;
+
+ return ISDIGIT (qref[-ret]);
+}
+
/* Demangle the calling convention from MANGLED and append it to DECL.
Return the remaining string on success or NULL on failure. */
static const char *
return mangled;
}
+/* Demangle the function type from MANGLED without the return type.
+ The arguments are appended to ARGS, the calling convention is appended
+ to CALL and attributes are appended to ATTR. Any of these can be NULL
+ to throw the information away. Return the remaining string on success
+ or NULL on failure. */
+static const char *
+dlang_function_type_noreturn (string *args, string *call, string *attr,
+ const char *mangled, struct dlang_info *info)
+{
+ string dump;
+ string_init (&dump);
+
+ /* Skip over calling convention and attributes. */
+ mangled = dlang_call_convention (call ? call : &dump, mangled);
+ mangled = dlang_attributes (attr ? attr : &dump, mangled);
+
+ if (args)
+ string_append (args, "(");
+
+ mangled = dlang_function_args (args ? args : &dump, mangled, info);
+ if (args)
+ string_append (args, ")");
+
+ string_delete (&dump);
+ return mangled;
+}
+
/* Demangle the function type from MANGLED and append it to DECL.
Return the remaining string on success or NULL on failure. */
static const char *
-dlang_function_type (string *decl, const char *mangled)
+dlang_function_type (string *decl, const char *mangled, struct dlang_info *info)
{
string attr, args, type;
- size_t szattr, szargs, sztype;
if (mangled == NULL || *mangled == '\0')
return NULL;
string_init (&args);
string_init (&type);
- /* Function call convention. */
- mangled = dlang_call_convention (decl, mangled);
-
- /* Function attributes. */
- mangled = dlang_attributes (&attr, mangled);
- szattr = string_length (&attr);
-
- /* Function arguments. */
- mangled = dlang_function_args (&args, mangled);
- szargs = string_length (&args);
+ mangled = dlang_function_type_noreturn (&args, decl, &attr, mangled, info);
/* Function return type. */
- mangled = dlang_type (&type, mangled);
- sztype = string_length (&type);
+ mangled = dlang_type (&type, mangled, info);
/* Append to decl in order. */
- string_appendn (decl, type.b, sztype);
- string_append (decl, "(");
- string_appendn (decl, args.b, szargs);
- string_append (decl, ") ");
- string_appendn (decl, attr.b, szattr);
+ string_appendn (decl, type.b, string_length (&type));
+ string_appendn (decl, args.b, string_length (&args));
+ string_append (decl, " ");
+ string_appendn (decl, attr.b, string_length (&attr));
string_delete (&attr);
string_delete (&args);
/* Demangle the argument list from MANGLED and append it to DECL.
Return the remaining string on success or NULL on failure. */
static const char *
-dlang_function_args (string *decl, const char *mangled)
+dlang_function_args (string *decl, const char *mangled, struct dlang_info *info)
{
size_t n = 0;
string_append (decl, "lazy ");
break;
}
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
}
return mangled;
/* Demangle the type from MANGLED and append it to DECL.
Return the remaining string on success or NULL on failure. */
static const char *
-dlang_type (string *decl, const char *mangled)
+dlang_type (string *decl, const char *mangled, struct dlang_info *info)
{
if (mangled == NULL || *mangled == '\0')
return NULL;
case 'O': /* shared(T) */
mangled++;
string_append (decl, "shared(");
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
string_append (decl, ")");
return mangled;
case 'x': /* const(T) */
mangled++;
string_append (decl, "const(");
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
string_append (decl, ")");
return mangled;
case 'y': /* immutable(T) */
mangled++;
string_append (decl, "immutable(");
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
string_append (decl, ")");
return mangled;
case 'N':
{
mangled++;
string_append (decl, "inout(");
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
string_append (decl, ")");
return mangled;
}
{
mangled++;
string_append (decl, "__vector(");
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
string_append (decl, ")");
return mangled;
}
return NULL;
case 'A': /* dynamic array (T[]) */
mangled++;
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
string_append (decl, "[]");
return mangled;
case 'G': /* static array (T[N]) */
num++;
mangled++;
}
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
string_append (decl, "[");
string_appendn (decl, numptr, num);
string_append (decl, "]");
mangled++;
string_init (&type);
- mangled = dlang_type (&type, mangled);
+ mangled = dlang_type (&type, mangled, info);
sztype = string_length (&type);
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
string_append (decl, "[");
string_appendn (decl, type.b, sztype);
string_append (decl, "]");
mangled++;
if (!dlang_call_convention_p (mangled))
{
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
string_append (decl, "*");
return mangled;
}
case 'R': /* function T (C++) */
case 'Y': /* function T (Objective-C) */
/* Function pointer types don't include the trailing asterisk. */
- mangled = dlang_function_type (decl, mangled);
+ mangled = dlang_function_type (decl, mangled, info);
string_append (decl, "function");
return mangled;
case 'I': /* ident T */
case 'E': /* enum T */
case 'T': /* typedef T */
mangled++;
- return dlang_parse_qualified (decl, mangled, dlang_type_name);
+ return dlang_parse_qualified (decl, mangled, info, 0);
case 'D': /* delegate T */
{
string mods;
mangled = dlang_type_modifiers (&mods, mangled);
szmods = string_length (&mods);
- mangled = dlang_function_type (decl, mangled);
+ /* Back referenced function type. */
+ if (*mangled == 'Q')
+ mangled = dlang_type_backref (decl, mangled, info, 1);
+ else
+ mangled = dlang_function_type (decl, mangled, info);
+
string_append (decl, "delegate");
string_appendn (decl, mods.b, szmods);
}
case 'B': /* tuple T */
mangled++;
- return dlang_parse_tuple (decl, mangled);
+ return dlang_parse_tuple (decl, mangled, info);
/* Basic types */
case 'n':
}
return NULL;
+ /* Back referenced type. */
+ case 'Q':
+ return dlang_type_backref (decl, mangled, info, 0);
+
default: /* unhandled */
return NULL;
}
/* Extract the identifier from MANGLED and append it to DECL.
Return the remaining string on success or NULL on failure. */
static const char *
-dlang_identifier (string *decl, const char *mangled,
- enum dlang_symbol_kinds kind)
+dlang_identifier (string *decl, const char *mangled, struct dlang_info *info)
{
long len;
- const char *endptr = dlang_number (mangled, &len);
- if (endptr == NULL || len == 0)
+ if (mangled == NULL || *mangled == '\0')
return NULL;
- /* In template parameter symbols, the first character of the mangled
- name can be a digit. This causes ambiguity issues because the
- digits of the two numbers are adjacent. */
- if (kind == dlang_template_param)
- {
- long psize = len;
- const char *pend;
- int saved = string_length (decl);
-
- /* Work backwards until a match is found. */
- for (pend = endptr; endptr != NULL; pend--)
- {
- mangled = pend;
+ if (*mangled == 'Q')
+ return dlang_symbol_backref (decl, mangled, info);
- /* Reached the beginning of the pointer to the name length,
- try parsing the entire symbol. */
- if (psize == 0)
- {
- psize = len;
- pend = endptr;
- endptr = NULL;
- }
+ /* May be a template instance without a length prefix. */
+ if (mangled[0] == '_' && mangled[1] == '_'
+ && (mangled[2] == 'T' || mangled[2] == 'U'))
+ return dlang_parse_template (decl, mangled, info, TEMPLATE_LENGTH_UNKNOWN);
- /* Check whether template parameter is a function with a valid
- return type or an untyped identifier. */
- if (ISDIGIT (*mangled))
- mangled = dlang_parse_qualified (decl, mangled,
- dlang_template_ident);
- else if (strncmp (mangled, "_D", 2) == 0)
- mangled = dlang_parse_mangle (decl, mangled, dlang_function);
+ const char *endptr = dlang_number (mangled, &len);
- /* Check for name length mismatch. */
- if (mangled && (mangled - pend) == psize)
- return mangled;
+ if (endptr == NULL || len == 0)
+ return NULL;
- psize /= 10;
- string_setlength (decl, saved);
- }
+ if (strlen (endptr) < (size_t) len)
+ return NULL;
- /* No match on any combinations. */
- return NULL;
- }
- else
- {
- if (strlen (endptr) < (size_t) len)
- return NULL;
+ mangled = endptr;
- mangled = endptr;
+ /* May be a template instance with a length prefix. */
+ if (len >= 5 && mangled[0] == '_' && mangled[1] == '_'
+ && (mangled[2] == 'T' || mangled[2] == 'U'))
+ return dlang_parse_template (decl, mangled, info, len);
- /* May be a template instance. */
- if (len >= 5 && mangled[0] == '_' && mangled[1] == '_'
- && (mangled[2] == 'T' || mangled[2] == 'U'))
- return dlang_parse_template (decl, mangled, len);
+ return dlang_lname (decl, mangled, len);
+}
- switch (len)
+/* Extract the plain identifier from MANGLED and prepend/append it to DECL
+ with special treatment for some magic compiler generted symbols.
+ Return the remaining string on success or NULL on failure. */
+static const char *
+dlang_lname (string *decl, const char *mangled, long len)
+{
+ switch (len)
+ {
+ case 6:
+ if (strncmp (mangled, "__ctor", len) == 0)
{
- case 6:
- if (strncmp (mangled, "__ctor", len) == 0)
- {
- /* Constructor symbol for a class/struct. */
- string_append (decl, "this");
- mangled += len;
- return mangled;
- }
- else if (strncmp (mangled, "__dtor", len) == 0)
- {
- /* Destructor symbol for a class/struct. */
- string_append (decl, "~this");
- mangled += len;
- return mangled;
- }
- else if (strncmp (mangled, "__initZ", len+1) == 0)
- {
- /* The static initialiser for a given symbol. */
- string_prepend (decl, "initializer for ");
- string_setlength (decl, string_length (decl) - 1);
- mangled += len;
- return mangled;
- }
- else if (strncmp (mangled, "__vtblZ", len+1) == 0)
- {
- /* The vtable symbol for a given class. */
- string_prepend (decl, "vtable for ");
- string_setlength (decl, string_length (decl) - 1);
- mangled += len;
- return mangled;
- }
- break;
-
- case 7:
- if (strncmp (mangled, "__ClassZ", len+1) == 0)
- {
- /* The classinfo symbol for a given class. */
- string_prepend (decl, "ClassInfo for ");
- string_setlength (decl, string_length (decl) - 1);
- mangled += len;
- return mangled;
- }
- break;
+ /* Constructor symbol for a class/struct. */
+ string_append (decl, "this");
+ mangled += len;
+ return mangled;
+ }
+ else if (strncmp (mangled, "__dtor", len) == 0)
+ {
+ /* Destructor symbol for a class/struct. */
+ string_append (decl, "~this");
+ mangled += len;
+ return mangled;
+ }
+ else if (strncmp (mangled, "__initZ", len + 1) == 0)
+ {
+ /* The static initialiser for a given symbol. */
+ string_prepend (decl, "initializer for ");
+ string_setlength (decl, string_length (decl) - 1);
+ mangled += len;
+ return mangled;
+ }
+ else if (strncmp (mangled, "__vtblZ", len + 1) == 0)
+ {
+ /* The vtable symbol for a given class. */
+ string_prepend (decl, "vtable for ");
+ string_setlength (decl, string_length (decl) - 1);
+ mangled += len;
+ return mangled;
+ }
+ break;
- case 10:
- if (strncmp (mangled, "__postblitMFZ", len+3) == 0)
- {
- /* Postblit symbol for a struct. */
- string_append (decl, "this(this)");
- mangled += len + 3;
- return mangled;
- }
- break;
+ case 7:
+ if (strncmp (mangled, "__ClassZ", len + 1) == 0)
+ {
+ /* The classinfo symbol for a given class. */
+ string_prepend (decl, "ClassInfo for ");
+ string_setlength (decl, string_length (decl) - 1);
+ mangled += len;
+ return mangled;
+ }
+ break;
- case 11:
- if (strncmp (mangled, "__InterfaceZ", len+1) == 0)
- {
- /* The interface symbol for a given class. */
- string_prepend (decl, "Interface for ");
- string_setlength (decl, string_length (decl) - 1);
- mangled += len;
- return mangled;
- }
- break;
+ case 10:
+ if (strncmp (mangled, "__postblitMFZ", len + 3) == 0)
+ {
+ /* Postblit symbol for a struct. */
+ string_append (decl, "this(this)");
+ mangled += len + 3;
+ return mangled;
+ }
+ break;
- case 12:
- if (strncmp (mangled, "__ModuleInfoZ", len+1) == 0)
- {
- /* The ModuleInfo symbol for a given module. */
- string_prepend (decl, "ModuleInfo for ");
- string_setlength (decl, string_length (decl) - 1);
- mangled += len;
- return mangled;
- }
- break;
+ case 11:
+ if (strncmp (mangled, "__InterfaceZ", len + 1) == 0)
+ {
+ /* The interface symbol for a given class. */
+ string_prepend (decl, "Interface for ");
+ string_setlength (decl, string_length (decl) - 1);
+ mangled += len;
+ return mangled;
}
+ break;
- string_appendn (decl, mangled, len);
- mangled += len;
+ case 12:
+ if (strncmp (mangled, "__ModuleInfoZ", len + 1) == 0)
+ {
+ /* The ModuleInfo symbol for a given module. */
+ string_prepend (decl, "ModuleInfo for ");
+ string_setlength (decl, string_length (decl) - 1);
+ mangled += len;
+ return mangled;
+ }
+ break;
}
+ string_appendn (decl, mangled, len);
+ mangled += len;
+
return mangled;
}
/* Extract and demangle the symbol in MANGLED and append it to DECL.
Returns the remaining signature on success or NULL on failure. */
static const char *
-dlang_parse_mangle (string *decl, const char *mangled,
- enum dlang_symbol_kinds kind)
+dlang_parse_mangle (string *decl, const char *mangled, struct dlang_info *info)
{
/* A D mangled symbol is comprised of both scope and type information.
MangleName:
_D QualifiedName Type
- _D QualifiedName M Type
_D QualifiedName Z
^
The caller should have guaranteed that the start pointer is at the
above location.
+ Note that type is never a function type, but only the return type of
+ a function or the type of a variable.
*/
mangled += 2;
- mangled = dlang_parse_qualified (decl, mangled, dlang_top_level);
+ mangled = dlang_parse_qualified (decl, mangled, info, 1);
if (mangled != NULL)
{
mangled++;
else
{
- string mods;
- int saved;
-
- /* Skip over 'this' parameter. */
- if (*mangled == 'M')
- mangled++;
-
- /* Save the type modifiers for appending at the end if needed. */
- string_init (&mods);
- mangled = dlang_type_modifiers (&mods, mangled);
-
- if (mangled && dlang_call_convention_p (mangled))
- {
- /* Skip over calling convention and attributes. */
- saved = string_length (decl);
- mangled = dlang_call_convention (decl, mangled);
- mangled = dlang_attributes (decl, mangled);
- string_setlength (decl, saved);
-
- string_append (decl, "(");
- mangled = dlang_function_args (decl, mangled);
- string_append (decl, ")");
-
- /* Add any const/immutable/shared modifier. */
- string_appendn (decl, mods.b, string_length (&mods));
- }
-
- /* Consume the decl type of symbol. */
- saved = string_length (decl);
- mangled = dlang_type (decl, mangled);
- string_setlength (decl, saved);
+ /* Discard the declaration or return type. */
+ string type;
- string_delete (&mods);
+ string_init (&type);
+ mangled = dlang_type (&type, mangled, info);
+ string_delete (&type);
}
}
- /* Check that the entire symbol was successfully demangled. */
- if (kind == dlang_top_level)
- {
- if (mangled == NULL || *mangled != '\0')
- return NULL;
- }
-
return mangled;
}
/* Extract and demangle the qualified symbol in MANGLED and append it to DECL.
+ SUFFIX_MODIFIERS is 1 if we are printing modifiers on this after the symbol.
Returns the remaining signature on success or NULL on failure. */
static const char *
dlang_parse_qualified (string *decl, const char *mangled,
- enum dlang_symbol_kinds kind)
+ struct dlang_info *info, int suffix_modifiers)
{
/* Qualified names are identifiers separated by their encoded length.
Nested functions also encode their argument types without specifying
what they return.
QualifiedName:
- SymbolName
- SymbolName QualifiedName
- SymbolName TypeFunctionNoReturn QualifiedName
- SymbolName M TypeModifiers TypeFunctionNoReturn QualifiedName
+ SymbolFunctionName
+ SymbolFunctionName QualifiedName
^
+
+ SymbolFunctionName:
+ SymbolName
+ SymbolName TypeFunctionNoReturn
+ SymbolName M TypeFunctionNoReturn
+ SymbolName M TypeModifiers TypeFunctionNoReturn
+
The start pointer should be at the above location.
*/
size_t n = 0;
while (*mangled == '0')
mangled++;
- mangled = dlang_identifier (decl, mangled, kind);
+ mangled = dlang_identifier (decl, mangled, info);
/* Consume the encoded arguments. However if this is not followed by the
- next encoded length, then this is not a continuation of a qualified
- name, in which case we backtrack and return the current unconsumed
- position of the mangled decl. */
+ next encoded length or mangle type, then this is not a continuation of
+ a qualified name, in which case we backtrack and return the current
+ unconsumed position of the mangled decl. */
if (mangled && (*mangled == 'M' || dlang_call_convention_p (mangled)))
{
+ string mods;
const char *start = mangled;
int saved = string_length (decl);
+ /* Save the type modifiers for appending at the end if needed. */
+ string_init (&mods);
+
/* Skip over 'this' parameter and type modifiers. */
if (*mangled == 'M')
{
mangled++;
- mangled = dlang_type_modifiers (decl, mangled);
+ mangled = dlang_type_modifiers (&mods, mangled);
string_setlength (decl, saved);
}
- /* The rule we expect to match in the mangled string is:
-
- TypeFunctionNoReturn:
- CallConvention FuncAttrs Arguments ArgClose
-
- The calling convention and function attributes are not included
- in the demangled string. */
- mangled = dlang_call_convention (decl, mangled);
- mangled = dlang_attributes (decl, mangled);
- string_setlength (decl, saved);
+ mangled = dlang_function_type_noreturn (decl, NULL, NULL,
+ mangled, info);
+ if (suffix_modifiers)
+ string_appendn (decl, mods.b, string_length (&mods));
- string_append (decl, "(");
- mangled = dlang_function_args (decl, mangled);
- string_append (decl, ")");
-
- if (mangled == NULL || !ISDIGIT (*mangled))
+ if (mangled == NULL || *mangled == '\0')
{
/* Did not match the rule we were looking for. */
mangled = start;
string_setlength (decl, saved);
}
+
+ string_delete (&mods);
}
}
- while (mangled && ISDIGIT (*mangled));
+ while (mangled && dlang_symbol_name_p (mangled, info));
return mangled;
}
/* Demangle the tuple from MANGLED and append it to DECL.
Return the remaining string on success or NULL on failure. */
static const char *
-dlang_parse_tuple (string *decl, const char *mangled)
+dlang_parse_tuple (string *decl, const char *mangled, struct dlang_info *info)
{
long elements;
while (elements--)
{
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
if (mangled == NULL)
return NULL;
return mangled;
}
+/* Demangle the template symbol parameter from MANGLED and append it to DECL.
+ Return the remaining string on success or NULL on failure. */
+static const char *
+dlang_template_symbol_param (string *decl, const char *mangled,
+ struct dlang_info *info)
+{
+ if (strncmp (mangled, "_D", 2) == 0
+ && dlang_symbol_name_p (mangled + 2, info))
+ return dlang_parse_mangle (decl, mangled, info);
+
+ if (*mangled == 'Q')
+ return dlang_parse_qualified (decl, mangled, info, 0);
+
+ long len;
+ const char *endptr = dlang_number (mangled, &len);
+
+ if (endptr == NULL || len == 0)
+ return NULL;
+
+ /* In template parameter symbols generated by the frontend up to 2.076,
+ the symbol length is encoded and the first character of the mangled
+ name can be a digit. This causes ambiguity issues because the digits
+ of the two numbers are adjacent. */
+ long psize = len;
+ const char *pend;
+ int saved = string_length (decl);
+
+ /* Work backwards until a match is found. */
+ for (pend = endptr; endptr != NULL; pend--)
+ {
+ mangled = pend;
+
+ /* Reached the beginning of the pointer to the name length,
+ try parsing the entire symbol. */
+ if (psize == 0)
+ {
+ psize = len;
+ pend = endptr;
+ endptr = NULL;
+ }
+
+ /* Check whether template parameter is a function with a valid
+ return type or an untyped identifier. */
+ if (dlang_symbol_name_p (mangled, info))
+ mangled = dlang_parse_qualified (decl, mangled, info, 0);
+ else if (strncmp (mangled, "_D", 2) == 0
+ && dlang_symbol_name_p (mangled + 2, info))
+ mangled = dlang_parse_mangle (decl, mangled, info);
+
+ /* Check for name length mismatch. */
+ if (mangled && (endptr == NULL || (mangled - pend) == psize))
+ return mangled;
+
+ psize /= 10;
+ string_setlength (decl, saved);
+ }
+
+ /* No match on any combinations. */
+ return NULL;
+}
+
/* Demangle the argument list from MANGLED and append it to DECL.
Return the remaining string on success or NULL on failure. */
static const char *
-dlang_template_args (string *decl, const char *mangled)
+dlang_template_args (string *decl, const char *mangled, struct dlang_info *info)
{
size_t n = 0;
{
case 'S': /* Symbol parameter. */
mangled++;
- mangled = dlang_identifier (decl, mangled, dlang_template_param);
+ mangled = dlang_template_symbol_param (decl, mangled, info);
break;
case 'T': /* Type parameter. */
mangled++;
- mangled = dlang_type (decl, mangled);
+ mangled = dlang_type (decl, mangled, info);
break;
case 'V': /* Value parameter. */
{
mangled++;
type = *mangled;
+ if (type == 'Q')
+ {
+ /* Value type is a back reference, peek at the real type. */
+ const char *backref;
+ if (dlang_backref (mangled, &backref, info) == NULL)
+ return NULL;
+
+ type = *backref;
+ }
+
/* In the few instances where the type is actually desired in
the output, it should precede the value from dlang_value. */
string_init (&name);
- mangled = dlang_type (&name, mangled);
+ mangled = dlang_type (&name, mangled, info);
string_need (&name, 1);
*(name.p) = '\0';
string_delete (&name);
break;
}
+ case 'X': /* Externally mangled parameter. */
+ {
+ long len;
+ const char *endptr;
+ mangled++;
+ endptr = dlang_number (mangled, &len);
+ if (endptr == NULL || strlen (endptr) < (size_t) len)
+ return NULL;
+
+ string_appendn (decl, endptr, len);
+ mangled = endptr + len;
+ break;
+ }
default:
return NULL;
}
}
/* Extract and demangle the template symbol in MANGLED, expected to
- be made up of LEN characters, and append it to DECL.
+ be made up of LEN characters (-1 if unknown), and append it to DECL.
Returns the remaining signature on success or NULL on failure. */
static const char *
-dlang_parse_template (string *decl, const char *mangled, long len)
+dlang_parse_template (string *decl, const char *mangled,
+ struct dlang_info *info, long len)
{
const char *start = mangled;
+ string args;
/* Template instance names have the types and values of its parameters
encoded into it.
*/
/* Template symbol. */
- if (!ISDIGIT (mangled[3]) || mangled[3] == '0')
+ if (!dlang_symbol_name_p (mangled + 3, info) || mangled[3] == '0')
return NULL;
mangled += 3;
/* Template identifier. */
- mangled = dlang_identifier (decl, mangled, dlang_template_ident);
+ mangled = dlang_identifier (decl, mangled, info);
/* Template arguments. */
+ string_init (&args);
+ mangled = dlang_template_args (&args, mangled, info);
+
string_append (decl, "!(");
- mangled = dlang_template_args (decl, mangled);
+ string_appendn (decl, args.b, string_length (&args));
string_append (decl, ")");
+ string_delete (&args);
+
/* Check for template name length mismatch. */
- if (mangled && (mangled - start) != len)
+ if (len != TEMPLATE_LENGTH_UNKNOWN && mangled && (mangled - start) != len)
return NULL;
return mangled;
}
+/* Initialize the information structure we use to pass around information. */
+static void
+dlang_demangle_init_info (const char *mangled, int last_backref,
+ struct dlang_info *info)
+{
+ info->s = mangled;
+ info->last_backref = last_backref;
+}
+
/* Extract and demangle the symbol in MANGLED. Returns the demangled
signature on success or NULL on failure. */
}
else
{
- if (dlang_parse_mangle (&decl, mangled, dlang_top_level) == NULL)
+ struct dlang_info info;
+
+ dlang_demangle_init_info (mangled, strlen (mangled), &info);
+ mangled = dlang_parse_mangle (&decl, mangled, &info);
+
+ /* Check that the entire symbol was successfully demangled. */
+ if (mangled == NULL || *mangled != '\0')
string_delete (&decl);
}
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