// This also implements the preprocessor
//
// Author: Miguel de Icaza (miguel@gnu.org)
+// Marek Safar (marek.safar@seznam.cz)
//
// Licensed under the terms of the GNU GPL
//
// (C) 2001, 2002 Ximian, Inc (http://www.ximian.com)
// (C) 2004 Novell, Inc
//
-
-/*
- * TODO:
- * Make sure we accept the proper Unicode ranges, per the spec.
- * Report error 1032
-*/
+//
using System;
using System.Text;
bool handle_get_set = false;
bool handle_remove_add = false;
bool handle_assembly = false;
+ bool handle_constraints = false;
+ bool handle_typeof = false;
+ bool linq;
Location current_location;
Location current_comment_location = Location.Null;
ArrayList escapedIdentifiers = new ArrayList ();
bool any_token_seen = false;
static Hashtable tokenValues;
+ static readonly char[] simple_whitespaces = new char[] { ' ', '\t' };
private static Hashtable TokenValueName
{
}
}
+ public bool ConstraintsParsing {
+ get {
+ return handle_constraints;
+ }
+
+ set {
+ handle_constraints = value;
+ }
+ }
+
+ public bool TypeOfParsing {
+ get {
+ return handle_typeof;
+ }
+
+ set {
+ handle_typeof = value;
+ }
+ }
+
public XmlCommentState doc_state {
get { return xmlDocState; }
set {
return false;
}
-
//
// Class variables
//
Hashtable defines;
const int TAKING = 1;
- const int TAKEN_BEFORE = 2;
const int ELSE_SEEN = 4;
const int PARENT_TAKING = 8;
const int REGION = 16;
}
}
+ //
+ // This is used when the tokenizer needs to save
+ // the current position as it needs to do some parsing
+ // on its own to deamiguate a token in behalf of the
+ // parser.
+ //
+ Stack position_stack = new Stack (2);
+ class Position {
+ public int position;
+ public int ref_line;
+ public int col;
+ public int putback_char;
+ public int previous_col;
+ public Stack ifstack;
+ public int parsing_generic_less_than;
+ public int current_token;
+
+ public Position (Tokenizer t)
+ {
+ position = t.reader.Position;
+ ref_line = t.ref_line;
+ col = t.col;
+ putback_char = t.putback_char;
+ previous_col = t.previous_col;
+ if (t.ifstack != null && t.ifstack.Count != 0)
+ ifstack = (Stack)t.ifstack.Clone ();
+ parsing_generic_less_than = t.parsing_generic_less_than;
+ current_token = t.current_token;
+ }
+ }
+
+ public void PushPosition ()
+ {
+ position_stack.Push (new Position (this));
+ }
+
+ public void PopPosition ()
+ {
+ Position p = (Position) position_stack.Pop ();
+
+ reader.Position = p.position;
+ ref_line = p.ref_line;
+ col = p.col;
+ putback_char = p.putback_char;
+ previous_col = p.previous_col;
+ ifstack = p.ifstack;
+ parsing_generic_less_than = p.parsing_generic_less_than;
+ current_token = p.current_token;
+ }
+
+ // Do not reset the position, ignore it.
+ public void DiscardPosition ()
+ {
+ position_stack.Pop ();
+ }
+
static void AddKeyword (string kw, int token) {
keywordStrings.Add (kw, kw);
if (keywords [kw.Length] == null) {
AddKeyword ("volatile", Token.VOLATILE);
AddKeyword ("while", Token.WHILE);
AddKeyword ("partial", Token.PARTIAL);
+#if GMCS_SOURCE
+ AddKeyword ("where", Token.WHERE);
+#endif
}
//
return -1;
if (handle_assembly == false && res == Token.ASSEMBLY)
return -1;
-
+#if GMCS_SOURCE
+ if (handle_constraints == false && res == Token.WHERE)
+ return -1;
+#endif
return res;
}
{
this.ref_name = file;
this.file_name = file;
+ linq = RootContext.Version == LanguageVersion.LINQ;
reader = input;
putback_char = -1;
static bool is_identifier_start_character (char c)
{
- return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_' || Char.IsLetter (c);
+ return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_' || Char.IsLetter (c);
}
static bool is_identifier_part_character (char c)
{
- return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_' || (c >= '0' && c <= '9') || Char.IsLetter (c);
+ return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_' || (c >= '0' && c <= '9') ||
+ Char.IsLetter (c) || Char.GetUnicodeCategory (c) == UnicodeCategory.ConnectorPunctuation;
}
public static bool IsKeyword (string s)
return true;
}
+ bool parse_generic_dimension (out int dimension)
+ {
+ dimension = 1;
+
+ again:
+ int the_token = token ();
+ if (the_token == Token.OP_GENERICS_GT)
+ return true;
+ else if (the_token == Token.COMMA) {
+ dimension++;
+ goto again;
+ }
+
+ return false;
+ }
+
+ bool parse_less_than ()
+ {
+ start:
+ int the_token = token ();
+ if (the_token == Token.OPEN_BRACKET) {
+ do {
+ the_token = token ();
+ } while (the_token != Token.CLOSE_BRACKET);
+ the_token = token ();
+ }
+ switch (the_token) {
+ case Token.IDENTIFIER:
+ case Token.OBJECT:
+ case Token.STRING:
+ case Token.BOOL:
+ case Token.DECIMAL:
+ case Token.FLOAT:
+ case Token.DOUBLE:
+ case Token.SBYTE:
+ case Token.BYTE:
+ case Token.SHORT:
+ case Token.USHORT:
+ case Token.INT:
+ case Token.UINT:
+ case Token.LONG:
+ case Token.ULONG:
+ case Token.CHAR:
+ case Token.VOID:
+ break;
+
+ default:
+ return false;
+ }
+ again:
+ the_token = token ();
+
+ if (the_token == Token.OP_GENERICS_GT)
+ return true;
+ else if (the_token == Token.COMMA || the_token == Token.DOT || the_token == Token.DOUBLE_COLON)
+ goto start;
+ else if (the_token == Token.INTERR || the_token == Token.STAR)
+ goto again;
+ else if (the_token == Token.OP_GENERICS_LT) {
+ if (!parse_less_than ())
+ return false;
+ goto again;
+ } else if (the_token == Token.OPEN_BRACKET) {
+ rank_specifiers:
+ the_token = token ();
+ if (the_token == Token.CLOSE_BRACKET)
+ goto again;
+ else if (the_token == Token.COMMA)
+ goto rank_specifiers;
+ return false;
+ }
+
+ return false;
+ }
+
+#if GMCS_SOURCE
+ public void PutbackNullable ()
+ {
+ if (nullable_pos < 0)
+ throw new Exception ();
+
+ current_token = -1;
+ val = null;
+ reader.Position = nullable_pos;
+
+ putback_char = '?';
+ }
+
+ public void PutbackCloseParens ()
+ {
+ putback_char = ')';
+ }
+
+
+ int nullable_pos = -1;
+
+ public void CheckNullable (bool is_nullable)
+ {
+ if (is_nullable)
+ nullable_pos = reader.Position;
+ else
+ nullable_pos = -1;
+ }
+#endif
+
+ public int peek_token ()
+ {
+ int the_token;
+
+ PushPosition ();
+ the_token = token ();
+ PopPosition ();
+
+ return the_token;
+ }
+
+ bool parse_namespace_or_typename (int next)
+ {
+ if (next == -1)
+ next = peek_token ();
+ while (next == Token.IDENTIFIER){
+ token ();
+ again:
+ next = peek_token ();
+ if (next == Token.DOT || next == Token.DOUBLE_COLON){
+ token ();
+ next = peek_token ();
+ continue;
+ }
+ if (next == Token.OP_GENERICS_LT){
+ token ();
+ if (!parse_less_than ())
+ return false;
+ goto again;
+ }
+ return true;
+ }
+
+ return false;
+ }
+
+ bool is_simple_type (int token)
+ {
+ return (token == Token.BOOL ||
+ token == Token.DECIMAL ||
+ token == Token.SBYTE ||
+ token == Token.BYTE ||
+ token == Token.SHORT ||
+ token == Token.USHORT ||
+ token == Token.INT ||
+ token == Token.UINT ||
+ token == Token.LONG ||
+ token == Token.ULONG ||
+ token == Token.CHAR ||
+ token == Token.FLOAT ||
+ token == Token.DOUBLE);
+ }
+
+ bool is_builtin_reference_type (int token)
+ {
+ return (token == Token.OBJECT || token == Token.STRING);
+ }
+
+ bool parse_opt_rank (int next)
+ {
+ while (true){
+ if (next != Token.OPEN_BRACKET)
+ return true;
+
+ token ();
+ while (true){
+ next = token ();
+ if (next == Token.CLOSE_BRACKET){
+ next = peek_token ();
+ break;
+ }
+ if (next == Token.COMMA)
+ continue;
+
+ return false;
+ }
+ }
+ }
+
+ bool parse_type ()
+ {
+ int next = peek_token ();
+
+ if (is_simple_type (next)){
+ token ();
+ next = peek_token ();
+ if (next == Token.INTERR)
+ token ();
+ return parse_opt_rank (peek_token ());
+ }
+ if (parse_namespace_or_typename (next)){
+ next = peek_token ();
+ if (next == Token.INTERR)
+ token ();
+ return parse_opt_rank (peek_token ());
+ } else if (is_builtin_reference_type (next)){
+ token ();
+ return parse_opt_rank (peek_token ());
+ }
+
+ return false;
+ }
+
+ //
+ // Invoked after '(' has been seen and tries to parse:
+ // type identifier [, type identifier]*
+ //
+ // if this is the case, instead of returning an
+ // OPEN_PARENS token we return a special token that
+ // triggers lambda parsing.
+ //
+ // This is needed because we can not introduce the
+ // explicitly_typed_lambda_parameter_list after a '(' in the
+ // grammar without introducing reduce/reduce conflicts.
+ //
+ // We need to parse a type and if it is followed by an
+ // identifier, we know it has to be parsed as a lambda
+ // expression.
+ //
+ // the type expression can be prefixed with `ref' or `out'
+ //
+ public bool parse_lambda_parameters ()
+ {
+ while (true){
+ int next = peek_token ();
+
+ if (next == Token.REF || next == Token.OUT)
+ token ();
+
+ if (parse_type ()){
+ next = peek_token ();
+ if (next == Token.IDENTIFIER){
+ token ();
+ next = peek_token ();
+ if (next == Token.COMMA){
+ token ();
+ continue;
+ }
+ if (next == Token.CLOSE_PARENS)
+ return true;
+ }
+ }
+ return false;
+ }
+ }
+
+ int parsing_generic_less_than = 0;
+
int is_punct (char c, ref bool doread)
{
int d;
case ']':
return Token.CLOSE_BRACKET;
case '(':
- return Token.OPEN_PARENS;
+ if (linq){
+ PushPosition ();
+ bool have_lambda_parameter = parse_lambda_parameters ();
+ PopPosition ();
+
+ if (have_lambda_parameter)
+ return Token.OPEN_PARENS_LAMBDA;
+ else
+ return Token.OPEN_PARENS;
+ } else
+ return Token.OPEN_PARENS;
case ')': {
if (deambiguate_close_parens == 0)
return Token.CLOSE_PARENS;
--deambiguate_close_parens;
- // Save current position and parse next token.
- int old = reader.Position;
- int old_ref_line = ref_line;
- int old_col = col;
-
- // disable preprocessing directives when peeking
- process_directives = false;
- int new_token = token ();
- process_directives = true;
- reader.Position = old;
- ref_line = old_ref_line;
- col = old_col;
- putback_char = -1;
+ PushPosition ();
+
+ int new_token = xtoken ();
+
+ PopPosition ();
if (new_token == Token.OPEN_PARENS)
return Token.CLOSE_PARENS_OPEN_PARENS;
case '?':
return Token.INTERR;
}
+#if GMCS_SOURCE
+ if (c == '<') {
+ if (parsing_generic_less_than++ > 0)
+ return Token.OP_GENERICS_LT;
+
+ if (handle_typeof) {
+ int dimension;
+ PushPosition ();
+ if (parse_generic_dimension (out dimension)) {
+ val = dimension;
+ DiscardPosition ();
+ return Token.GENERIC_DIMENSION;
+ }
+ PopPosition ();
+ }
+
+ // Save current position and parse next token.
+ PushPosition ();
+ bool is_generic_lt = parse_less_than ();
+ PopPosition ();
+
+ if (is_generic_lt) {
+ return Token.OP_GENERICS_LT;
+ } else
+ parsing_generic_less_than = 0;
+
+ d = peekChar ();
+ if (d == '<'){
+ getChar ();
+ d = peekChar ();
+
+ if (d == '='){
+ doread = true;
+ return Token.OP_SHIFT_LEFT_ASSIGN;
+ }
+ return Token.OP_SHIFT_LEFT;
+ } else if (d == '='){
+ doread = true;
+ return Token.OP_LE;
+ }
+ return Token.OP_LT;
+ } else if (c == '>') {
+ if (parsing_generic_less_than > 0) {
+ parsing_generic_less_than--;
+ return Token.OP_GENERICS_GT;
+ }
+
+ d = peekChar ();
+ if (d == '>'){
+ getChar ();
+ d = peekChar ();
+ if (d == '='){
+ doread = true;
+ return Token.OP_SHIFT_RIGHT_ASSIGN;
+ }
+ return Token.OP_SHIFT_RIGHT;
+ } else if (d == '='){
+ doread = true;
+ return Token.OP_GE;
+ }
+ return Token.OP_GT;
+ }
+#endif
d = peekChar ();
if (c == '+'){
doread = true;
return Token.OP_EQ;
}
+ if (d == '>'){
+ doread = true;
+ val = Location;
+ return Token.ARROW;
+ }
return Token.ASSIGN;
}
return Token.CARRET;
}
+#if !GMCS_SOURCE
if (c == '<'){
if (d == '<'){
getChar ();
}
return Token.OP_GT;
}
+#endif
if (c == ':'){
if (d == ':'){
doread = true;
int deambiguate_close_parens = 0;
- public void Deambiguate_CloseParens ()
+ public void Deambiguate_CloseParens (object expression)
{
putback (')');
+
+ // When any binary operation is used we are sure it is not a cast
+ if (expression is Binary)
+ return;
+
deambiguate_close_parens++;
}
- void Error_NumericConstantTooLong ()
- {
- Report.Error (1021, Location, "Numeric constant too long");
- }
-
bool decimal_digits (int c)
{
int d;
if (putback_char != -1) {
x = putback_char;
putback_char = -1;
- }
- else
+ } else
x = reader.Read ();
if (x == '\n') {
line++;
case Token.LITERAL_STRING:
case Token.BASE:
case Token.CHECKED:
+ case Token.DELEGATE:
case Token.FALSE:
case Token.FIXED:
case Token.NEW:
case Token.TYPEOF:
case Token.UNCHECKED:
case Token.UNSAFE:
+#if GMCS_SOURCE
+ case Token.DEFAULT:
+#endif
//
// These can be part of a member access
}
public int token ()
- {
+ {
current_token = xtoken ();
- return current_token;
- }
+
+#if GMCS_SOURCE
+ if (current_token != Token.DEFAULT)
+ return current_token;
+
+ PushPosition();
+ int c = xtoken();
+ if (c == -1)
+ current_token = Token.ERROR;
+ else if (c == Token.OPEN_PARENS)
+ current_token = Token.DEFAULT_OPEN_PARENS;
+ else if (c == Token.COLON)
+ current_token = Token.DEFAULT_COLON;
+ else
+ PopPosition();
+#endif
+ return current_token;
+ }
static StringBuilder static_cmd_arg = new System.Text.StringBuilder ();
// skip over white space
while ((c = getChar ()) != -1 && (c != '\n') && ((c == '\r') || (c == ' ') || (c == '\t')))
;
-
-
+
while ((c != -1) && (c != '\n') && (c != ' ') && (c != '\t') && (c != '\r')){
if (is_identifier_part_character ((char) c)){
static_cmd_arg.Append ((char) c);
cmd = static_cmd_arg.ToString ();
- if (c == '\n'){
+ if (c == '\n' || c == '\r'){
return;
}
static_cmd_arg.Append ((char) c);
}
- arg = static_cmd_arg.ToString ().Trim ();
+ arg = static_cmd_arg.ToString ();
}
//
//
return true;
}
-
+
try {
int pos;
//
// Handles #define and #undef
//
- void PreProcessDefinition (bool is_define, string arg)
+ void PreProcessDefinition (bool is_define, string arg, bool caller_is_taking)
{
if (arg.Length == 0 || arg == "true" || arg == "false"){
Report.Error (1001, Location, "Missing identifer to pre-processor directive");
return;
}
- char[] whitespace = { ' ', '\t' };
- if (arg.IndexOfAny (whitespace) != -1){
- Report.Error (1025, Location, "Single-line comment or end-of-line expected");
+ if (arg.IndexOfAny (simple_whitespaces) != -1){
+ Error_EndLineExpected ();
return;
}
}
}
+ if (!caller_is_taking)
+ return;
+
if (is_define){
if (defines == null)
defines = new Hashtable ();
if (c == '('){
s = s.Substring (1);
- bool val = pp_expr (ref s);
+ bool val = pp_expr (ref s, false);
if (s.Length > 0 && s [0] == ')'){
s = s.Substring (1);
return val;
//
// Evaluates an expression for `#if' or `#elif'
//
- bool pp_expr (ref string s)
+ bool pp_expr (ref string s, bool isTerm)
{
bool va = pp_and (ref s);
s = s.Trim ();
if (c == '|'){
if (len > 2 && s [1] == '|'){
s = s.Substring (2);
- return va | pp_expr (ref s);
+ return va | pp_expr (ref s, isTerm);
} else {
Error_InvalidDirective ();
return false;
}
- }
+ }
+ if (isTerm) {
+ Error_EndLineExpected ();
+ return false;
+ }
}
return va;
bool eval (string s)
{
- bool v = pp_expr (ref s);
+ bool v = pp_expr (ref s, true);
s = s.Trim ();
if (s.Length != 0){
- Error_InvalidDirective ();
return false;
}
return v;
}
+
+ void Error_NumericConstantTooLong ()
+ {
+ Report.Error (1021, Location, "Numeric constant too long");
+ }
void Error_InvalidDirective ()
{
Report.Error (1032, Location,
"Cannot define or undefine preprocessor symbols after first token in file");
}
-
- //
- // Set to false to stop handling preprocesser directives
- //
- bool process_directives = true;
+ void Eror_WrongPreprocessorLocation ()
+ {
+ Report.Error (1040, Location,
+ "Preprocessor directives must appear as the first non-whitespace character on a line");
+ }
+
+ void Error_EndLineExpected ()
+ {
+ Report.Error (1025, Location, "Single-line comment or end-of-line expected");
+ }
+
//
// if true, then the code continues processing the code
// if false, the code stays in a loop until another directive is
// reached.
- //
+ // When caller_is_taking is false we ignore all directives except the ones
+ // which can help us to identify where the #if block ends
bool handle_preprocessing_directive (bool caller_is_taking)
{
string cmd, arg;
// Eat any trailing whitespaces and single-line comments
if (arg.IndexOf ("//") != -1)
arg = arg.Substring (0, arg.IndexOf ("//"));
- arg = arg.TrimEnd (' ', '\t');
+ arg = arg.Trim (simple_whitespaces);
//
// The first group of pre-processing instructions is always processed
//
switch (cmd){
- case "pragma":
- if (RootContext.Version == LanguageVersion.ISO_1) {
- Report.FeatureIsNotStandardized (Location, "#pragma");
- return caller_is_taking;
- }
-
- PreProcessPragma (arg);
- return caller_is_taking;
-
- case "line":
- if (!PreProcessLine (arg))
- Report.Error (
- 1576, Location,
- "The line number specified for #line directive is missing or invalid");
- return caller_is_taking;
-
case "region":
region_directive = true;
arg = "true";
goto case "if";
case "endregion":
- region_directive = true;
- goto case "endif";
-
- case "if":
- if (arg.Length == 0){
- Error_InvalidDirective ();
+ if (ifstack == null || ifstack.Count == 0){
+ Error_UnexpectedDirective ("no #region for this #endregion");
return true;
}
- bool taking = false;
+ int pop = (int) ifstack.Pop ();
+
+ if ((pop & REGION) == 0)
+ Report.Error (1027, Location, "Expected `#endif' directive");
+
+ return caller_is_taking;
+
+ case "if":
if (ifstack == null)
ifstack = new Stack (2);
+ int flags = region_directive ? REGION : 0;
if (ifstack.Count == 0){
- taking = true;
+ flags |= PARENT_TAKING;
} else {
int state = (int) ifstack.Peek ();
- if ((state & TAKING) != 0)
- taking = true;
+ if ((state & TAKING) != 0) {
+ flags |= PARENT_TAKING;
+ }
}
- if (eval (arg) && taking){
- int push = TAKING | TAKEN_BEFORE | PARENT_TAKING;
- if (region_directive)
- push |= REGION;
- ifstack.Push (push);
+ if (caller_is_taking && eval (arg)) {
+ ifstack.Push (flags | TAKING);
return true;
- } else {
- int push = (taking ? PARENT_TAKING : 0);
- if (region_directive)
- push |= REGION;
- ifstack.Push (push);
- return false;
}
+ ifstack.Push (flags);
+ return false;
case "endif":
if (ifstack == null || ifstack.Count == 0){
Error_UnexpectedDirective ("no #if for this #endif");
return true;
} else {
- int pop = (int) ifstack.Pop ();
+ pop = (int) ifstack.Pop ();
- if (region_directive && ((pop & REGION) == 0))
- Report.Error (1027, Location, "Expected `#endif' directive");
- else if (!region_directive && ((pop & REGION) != 0))
+ if ((pop & REGION) != 0)
Report.Error (1038, Location, "#endregion directive expected");
- if (!region_directive && arg.Length != 0) {
- Report.Error (1025, Location, "Single-line comment or end-of-line expected");
+ if (arg.Length != 0) {
+ Error_EndLineExpected ();
}
if (ifstack.Count == 0)
return true;
- else {
- int state = (int) ifstack.Peek ();
- if ((state & TAKING) != 0)
- return true;
- else
- return false;
- }
+ int state = (int) ifstack.Peek ();
+ return (state & TAKING) != 0;
}
case "elif":
Error_UnexpectedDirective ("no #if for this #elif");
return true;
} else {
- int state = (int) ifstack.Peek ();
+ int state = (int) ifstack.Pop ();
if ((state & REGION) != 0) {
Report.Error (1038, Location, "#endregion directive expected");
return true;
}
- if ((state & (TAKEN_BEFORE | TAKING)) != 0)
+ if ((state & TAKING) != 0) {
+ ifstack.Push (0);
return false;
+ }
if (eval (arg) && ((state & PARENT_TAKING) != 0)){
- state = (int) ifstack.Pop ();
- ifstack.Push (state | TAKING | TAKEN_BEFORE);
+ ifstack.Push (state | TAKING);
return true;
- } else
- return false;
+ }
+
+ ifstack.Push (state);
+ return false;
}
case "else":
ifstack.Pop ();
- bool ret;
- if ((state & TAKEN_BEFORE) == 0){
- ret = ((state & PARENT_TAKING) != 0);
- } else
- ret = false;
-
- if (ret)
- state |= TAKING;
- else
- state &= ~TAKING;
+ if (arg.Length != 0) {
+ Error_EndLineExpected ();
+ return true;
+ }
+
+ bool ret = false;
+ if ((state & PARENT_TAKING) != 0) {
+ ret = (state & TAKING) == 0;
+ if (ret)
+ state |= TAKING;
+ else
+ state &= ~TAKING;
+ }
+
ifstack.Push (state | ELSE_SEEN);
return ret;
}
+ case "define":
+ if (any_token_seen){
+ Error_TokensSeen ();
+ return caller_is_taking;
+ }
+ PreProcessDefinition (true, arg, caller_is_taking);
+ return caller_is_taking;
+
+ case "undef":
+ if (any_token_seen){
+ Error_TokensSeen ();
+ return caller_is_taking;
+ }
+ PreProcessDefinition (false, arg, caller_is_taking);
+ return caller_is_taking;
}
//
return false;
switch (cmd){
- case "define":
- if (any_token_seen){
- Error_TokensSeen ();
- return true;
- }
- PreProcessDefinition (true, arg);
- return true;
-
- case "undef":
- if (any_token_seen){
- Error_TokensSeen ();
- return true;
- }
- PreProcessDefinition (false, arg);
- return true;
-
case "error":
Report.Error (1029, Location, "#error: '" + arg + "'");
return true;
case "warning":
Report.Warning (1030, 1, Location, "#warning: `{0}'", arg);
return true;
+
+ case "pragma":
+ if (RootContext.Version == LanguageVersion.ISO_1) {
+ Report.FeatureIsNotISO1 (Location, "#pragma");
+ return true;
+ }
+
+ PreProcessPragma (arg);
+ return true;
+
+ case "line":
+ if (!PreProcessLine (arg))
+ Report.Error (
+ 1576, Location,
+ "The line number specified for #line directive is missing or invalid");
+ return caller_is_taking;
}
Report.Error (1024, Location, "Wrong preprocessor directive");
if (res == Token.PARTIAL) {
// Save current position and parse next token.
- int old = reader.Position;
- int old_putback = putback_char;
- int old_ref_line = ref_line;
- int old_col = col;
-
- putback_char = -1;
+ PushPosition ();
int next_token = token ();
bool ok = (next_token == Token.CLASS) ||
(next_token == Token.STRUCT) ||
- (next_token == Token.INTERFACE) ||
- (next_token == Token.ENUM); // "partial" is a keyword in 'partial enum', even though it's not valid
+ (next_token == Token.INTERFACE);
- reader.Position = old;
- ref_line = old_ref_line;
- col = old_col;
- putback_char = old_putback;
+ PopPosition ();
if (ok)
return res;
- else {
- val = new LocatedToken (Location, "partial");
- return Token.IDENTIFIER;
- }
+
+ if (next_token < Token.LAST_KEYWORD)
+ Report.Error (267, Location, "The `partial' modifier can be used only immediately before keyword `class', `struct', or `interface'");
+
+ val = new LocatedToken (Location, "partial");
+ return Token.IDENTIFIER;
}
return res;
current_location = new Location (ref_line, Col);
while ((c = getChar ()) != -1) {
+ loop:
if (is_identifier_part_character ((char) c)){
if (pos == max_id_size){
Report.Error (645, Location, "Identifier too long (limit is 512 chars)");
id_builder [pos++] = (char) c;
// putback_char = -1;
+ } else if (c == '\\') {
+ c = escape (c);
+ goto loop;
} else {
// putback_char = c;
putback (c);
// Whether we have seen comments on the current line
bool comments_seen = false;
-
val = null;
- // optimization: eliminate col and implement #directive semantic correctly.
for (;(c = getChar ()) != -1;) {
- if (c == ' ')
- continue;
-
- if (c == '\t') {
+ if (c == '\t'){
+ col = ((col + 8) / 8) * 8;
continue;
}
- if (c == ' ' || c == '\f' || c == '\v' || c == 0xa0)
+ if (c == ' ' || c == '\t' || c == '\f' || c == '\v' || c == 0xa0)
continue;
if (c == '\r') {
}
}
while ((d = getChar ()) != -1 && (d != '\n') && d != '\r')
- if (d == '\n'){
- }
+ if (d == '\n'){
+ }
any_token_seen |= tokens_seen;
tokens_seen = false;
comments_seen = false;
}
- if (is_identifier_start_character ((char)c)){
+ if (c == '\\' || is_identifier_start_character ((char)c)){
tokens_seen = true;
return consume_identifier (c);
}
return Token.DOT;
}
- /* For now, ignore pre-processor commands */
- // FIXME: In C# the '#' is not limited to appear
- // on the first column.
if (c == '#') {
- // return NONE if we're not processing directives (during token peeks)
- if (!process_directives)
- return Token.NONE;
-
- bool cont = true;
if (tokens_seen || comments_seen) {
- error_details = "Preprocessor directives must appear as the first" +
- " non-whitespace character on a line.";
+ Eror_WrongPreprocessorLocation ();
+ return Token.ERROR;
+ }
+
+ if (handle_preprocessing_directive (true))
+ continue;
- Report.Error (1040, Location, error_details);
+ bool directive_expected = false;
+ while ((c = getChar ()) != -1) {
+ if (col == 1) {
+ directive_expected = true;
+ } else if (!directive_expected) {
+ // TODO: Implement comment support for disabled code and uncomment this code
+// if (c == '#') {
+// Eror_WrongPreprocessorLocation ();
+// return Token.ERROR;
+// }
+ continue;
+ }
- return Token.ERROR;
- }
-
- start_again:
-
- cont = handle_preprocessing_directive (cont);
+ if (c == ' ' || c == '\t' || c == '\r' || c == '\n' || c == '\f' || c == '\v' )
+ continue;
- if (cont){
- continue;
+ if (c == '#') {
+ if (handle_preprocessing_directive (false))
+ break;
+ }
+ directive_expected = false;
}
- bool skipping = false;
- for (;(c = getChar ()) != -1;){
- if (c == '\n'){
- skipping = false;
- } else if (c == ' ' || c == '\t' || c == '\v' || c == '\r' || c == 0xa0)
- continue;
- else if (c != '#')
- skipping = true;
- if (c == '#' && !skipping)
- goto start_again;
+ if (c != -1) {
+ tokens_seen = false;
+ continue;
}
- any_token_seen |= tokens_seen;
- tokens_seen = false;
- if (c == -1)
- Report.Error (1027, Location, "Expected `#endif' directive");
- continue;
+
+ return Token.EOF;
}
if (c == '"')
public void cleanup ()
{
if (ifstack != null && ifstack.Count >= 1) {
+ current_location = new Location (ref_line, Col);
int state = (int) ifstack.Pop ();
if ((state & REGION) != 0)
Report.Error (1038, Location, "#endregion directive expected");
else
Report.Error (1027, Location, "Expected `#endif' directive");
}
-
}
}
Error
}
}
+
projects / mono.git / blobdiff