X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=mcs%2Fgmcs%2Fcs-tokenizer.cs;h=99f73b8270cf1a4767d83983274cd8d2812752fc;hb=92d6ca554ce151db866e4ac32b2f356d55766550;hp=69086e56e7ab046b577df52197a74dccda0c2cf2;hpb=96224344bd6d9b805ebbe38ed758739374acc3b8;p=mono.git
diff --git a/mcs/gmcs/cs-tokenizer.cs b/mcs/gmcs/cs-tokenizer.cs
old mode 100755
new mode 100644
index 69086e56e7a..99f73b8270c
--- a/mcs/gmcs/cs-tokenizer.cs
+++ b/mcs/gmcs/cs-tokenizer.cs
@@ -1,1962 +1,2509 @@
-//
-// cs-tokenizer.cs: The Tokenizer for the C# compiler
-// This also implements the preprocessor
-//
-// Author: Miguel de Icaza (miguel@gnu.org)
-//
-// Licensed under the terms of the GNU GPL
-//
-// (C) 2001, 2002 Ximian, Inc (http://www.ximian.com)
-//
-
-/*
- * TODO:
- * Make sure we accept the proper Unicode ranges, per the spec.
- * Report error 1032
-*/
-
-using System;
-using System.Text;
-using System.Collections;
-using System.IO;
-using System.Globalization;
-using System.Reflection;
-
-namespace Mono.CSharp
-{
- ///
- /// Tokenizer for C# source code.
- ///
-
- public class Tokenizer : yyParser.yyInput
- {
- SeekableStreamReader reader;
- public SourceFile ref_name;
- public SourceFile file_name;
- public int ref_line = 1;
- public int line = 1;
- public int col = 1;
- public int current_token;
- bool handle_get_set = false;
- bool handle_remove_add = false;
- bool handle_assembly = false;
-
- //
- // Whether tokens have been seen on this line
- //
- bool tokens_seen = false;
-
- //
- // Whether a token has been seen on the file
- // This is needed because `define' is not allowed to be used
- // after a token has been seen.
- //
- bool any_token_seen = false;
- static Hashtable tokenValues;
-
- private static Hashtable TokenValueName
- {
- get {
- if (tokenValues == null)
- tokenValues = GetTokenValueNameHash ();
-
- return tokenValues;
- }
- }
-
- private static Hashtable GetTokenValueNameHash ()
- {
- Type t = typeof (Token);
- FieldInfo [] fields = t.GetFields ();
- Hashtable hash = new Hashtable ();
- foreach (FieldInfo field in fields) {
- if (field.IsLiteral && field.IsStatic && field.FieldType == typeof (int))
- hash.Add (field.GetValue (null), field.Name);
- }
- return hash;
- }
-
- //
- // Returns a verbose representation of the current location
- //
- public string location {
- get {
- string det;
-
- if (current_token == Token.ERROR)
- det = "detail: " + error_details;
- else
- det = "";
-
- // return "Line: "+line+" Col: "+col + "\n" +
- // "VirtLine: "+ref_line +
- // " Token: "+current_token + " " + det;
- string current_token_name = TokenValueName [current_token] as string;
- if (current_token_name == null)
- current_token_name = current_token.ToString ();
-
- return String.Format ("{0} ({1},{2}), Token: {3} {4}", ref_name.Name,
- ref_line,
- col,
- current_token_name,
- det);
- }
- }
-
- public bool PropertyParsing {
- get {
- return handle_get_set;
- }
-
- set {
- handle_get_set = value;
- }
- }
-
- public bool AssemblyTargetParsing {
- get {
- return handle_assembly;
- }
-
- set {
- handle_assembly = value;
- }
- }
-
- public bool EventParsing {
- get {
- return handle_remove_add;
- }
-
- set {
- handle_remove_add = value;
- }
- }
-
- //
- // Class variables
- //
- static Hashtable keywords;
- static NumberStyles styles;
- static NumberFormatInfo csharp_format_info;
-
- //
- // Values for the associated token returned
- //
- int putback_char;
- Object val;
-
- //
- // Pre-processor
- //
- 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;
-
- //
- // pre-processor if stack state:
- //
- Stack ifstack;
-
- static System.Text.StringBuilder string_builder;
-
- const int max_id_size = 512;
- static char [] id_builder = new char [max_id_size];
-
- const int max_number_size = 128;
- static char [] number_builder = new char [max_number_size];
- static int number_pos;
-
- //
- // Details about the error encoutered by the tokenizer
- //
- string error_details;
-
- public string error {
- get {
- return error_details;
- }
- }
-
- public int Line {
- get {
- return ref_line;
- }
- }
-
- public int Col {
- get {
- return col;
- }
- }
-
- static void InitTokens ()
- {
- keywords = new Hashtable ();
-
- keywords.Add ("abstract", Token.ABSTRACT);
- keywords.Add ("as", Token.AS);
- keywords.Add ("add", Token.ADD);
- keywords.Add ("assembly", Token.ASSEMBLY);
- keywords.Add ("base", Token.BASE);
- keywords.Add ("bool", Token.BOOL);
- keywords.Add ("break", Token.BREAK);
- keywords.Add ("byte", Token.BYTE);
- keywords.Add ("case", Token.CASE);
- keywords.Add ("catch", Token.CATCH);
- keywords.Add ("char", Token.CHAR);
- keywords.Add ("checked", Token.CHECKED);
- keywords.Add ("class", Token.CLASS);
- keywords.Add ("const", Token.CONST);
- keywords.Add ("continue", Token.CONTINUE);
- keywords.Add ("decimal", Token.DECIMAL);
- keywords.Add ("default", Token.DEFAULT);
- keywords.Add ("delegate", Token.DELEGATE);
- keywords.Add ("do", Token.DO);
- keywords.Add ("double", Token.DOUBLE);
- keywords.Add ("else", Token.ELSE);
- keywords.Add ("enum", Token.ENUM);
- keywords.Add ("event", Token.EVENT);
- keywords.Add ("explicit", Token.EXPLICIT);
- keywords.Add ("extern", Token.EXTERN);
- keywords.Add ("false", Token.FALSE);
- keywords.Add ("finally", Token.FINALLY);
- keywords.Add ("fixed", Token.FIXED);
- keywords.Add ("float", Token.FLOAT);
- keywords.Add ("for", Token.FOR);
- keywords.Add ("foreach", Token.FOREACH);
- keywords.Add ("goto", Token.GOTO);
- keywords.Add ("get", Token.GET);
- keywords.Add ("if", Token.IF);
- keywords.Add ("implicit", Token.IMPLICIT);
- keywords.Add ("in", Token.IN);
- keywords.Add ("int", Token.INT);
- keywords.Add ("interface", Token.INTERFACE);
- keywords.Add ("internal", Token.INTERNAL);
- keywords.Add ("is", Token.IS);
- keywords.Add ("lock", Token.LOCK);
- keywords.Add ("long", Token.LONG);
- keywords.Add ("namespace", Token.NAMESPACE);
- keywords.Add ("new", Token.NEW);
- keywords.Add ("null", Token.NULL);
- keywords.Add ("object", Token.OBJECT);
- keywords.Add ("operator", Token.OPERATOR);
- keywords.Add ("out", Token.OUT);
- keywords.Add ("override", Token.OVERRIDE);
- keywords.Add ("params", Token.PARAMS);
- keywords.Add ("private", Token.PRIVATE);
- keywords.Add ("protected", Token.PROTECTED);
- keywords.Add ("public", Token.PUBLIC);
- keywords.Add ("readonly", Token.READONLY);
- keywords.Add ("ref", Token.REF);
- keywords.Add ("remove", Token.REMOVE);
- keywords.Add ("return", Token.RETURN);
- keywords.Add ("sbyte", Token.SBYTE);
- keywords.Add ("sealed", Token.SEALED);
- keywords.Add ("set", Token.SET);
- keywords.Add ("short", Token.SHORT);
- keywords.Add ("sizeof", Token.SIZEOF);
- keywords.Add ("stackalloc", Token.STACKALLOC);
- keywords.Add ("static", Token.STATIC);
- keywords.Add ("string", Token.STRING);
- keywords.Add ("struct", Token.STRUCT);
- keywords.Add ("switch", Token.SWITCH);
- keywords.Add ("this", Token.THIS);
- keywords.Add ("throw", Token.THROW);
- keywords.Add ("true", Token.TRUE);
- keywords.Add ("try", Token.TRY);
- keywords.Add ("typeof", Token.TYPEOF);
- keywords.Add ("uint", Token.UINT);
- keywords.Add ("ulong", Token.ULONG);
- keywords.Add ("unchecked", Token.UNCHECKED);
- keywords.Add ("unsafe", Token.UNSAFE);
- keywords.Add ("ushort", Token.USHORT);
- keywords.Add ("using", Token.USING);
- keywords.Add ("virtual", Token.VIRTUAL);
- keywords.Add ("void", Token.VOID);
- keywords.Add ("volatile", Token.VOLATILE);
- keywords.Add ("where", Token.WHERE);
- keywords.Add ("while", Token.WHILE);
-
- if (RootContext.V2){
- keywords.Add ("__yield", Token.YIELD);
- keywords.Add ("yield", Token.YIELD);
- }
- }
-
- //
- // Class initializer
- //
- static Tokenizer ()
- {
- InitTokens ();
- csharp_format_info = NumberFormatInfo.InvariantInfo;
- styles = NumberStyles.Float;
-
- string_builder = new System.Text.StringBuilder ();
- }
-
- int GetKeyword (string name)
- {
- object o = keywords [name];
-
- if (o == null)
- return -1;
-
- int res = (int) o;
-
- if (handle_get_set == false && (res == Token.GET || res == Token.SET))
- return -1;
- if (handle_remove_add == false && (res == Token.REMOVE || res == Token.ADD))
- return -1;
- if (handle_assembly == false && res == Token.ASSEMBLY)
- return -1;
- return res;
-
- }
-
- public Location Location {
- get {
- return new Location (ref_line);
- }
- }
-
- void define (string def)
- {
- if (!RootContext.AllDefines.Contains (def)){
- RootContext.AllDefines [def] = true;
- }
- if (defines.Contains (def))
- return;
- defines [def] = true;
- }
-
- public Tokenizer (SeekableStreamReader input, SourceFile file, ArrayList defs)
- {
- this.ref_name = file;
- this.file_name = file;
- reader = input;
-
- putback_char = -1;
-
- if (defs != null){
- defines = new Hashtable ();
- foreach (string def in defs)
- define (def);
- }
-
- //
- // FIXME: This could be `Location.Push' but we have to
- // find out why the MS compiler allows this
- //
- Mono.CSharp.Location.Push (file);
- }
-
- bool is_identifier_start_character (char c)
- {
- return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_' || Char.IsLetter (c);
- }
-
- bool is_identifier_part_character (char c)
- {
- return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_' || (c >= '0' && c <= '9') || Char.IsLetter (c);
- }
-
- bool parse_less_than ()
- {
- start:
- int 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)
- goto start;
- else if (the_token == Token.OP_GENERICS_LT) {
- if (!parse_less_than ())
- return false;
- goto again;
- }
-
- return false;
- }
-
- bool parsing_less_than = false;
- int parsing_generic_less_than = 0;
-
- int is_punct (char c, ref bool doread)
- {
- int d;
- int t;
-
- doread = false;
-
- switch (c){
- case '{':
- return Token.OPEN_BRACE;
- case '}':
- return Token.CLOSE_BRACE;
- case '[':
- return Token.OPEN_BRACKET;
- case ']':
- return Token.CLOSE_BRACKET;
- case '(':
- 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 new_token = token ();
- reader.Position = old;
- putback_char = -1;
-
- if (new_token == Token.OPEN_PARENS)
- return Token.CLOSE_PARENS_OPEN_PARENS;
- else if (new_token == Token.MINUS)
- return Token.CLOSE_PARENS_MINUS;
- else if (IsCastToken (new_token))
- return Token.CLOSE_PARENS_CAST;
- else
- return Token.CLOSE_PARENS_NO_CAST;
- }
-
- case ',':
- return Token.COMMA;
- case ':':
- return Token.COLON;
- case ';':
- return Token.SEMICOLON;
- case '~':
- return Token.TILDE;
- case '?':
- return Token.INTERR;
- }
-
- if (c == '<') {
- if (parsing_generic_less_than++ > 0)
- return Token.OP_GENERICS_LT;
-
- // Save current position and parse next token.
- int old = reader.Position;
- bool is_generic_lt = parse_less_than ();
- reader.Position = old;
- putback_char = -1;
-
- if (is_generic_lt) {
- parsing_generic_less_than++;
- 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;
- }
-
- d = peekChar ();
- if (c == '+'){
-
- if (d == '+')
- t = Token.OP_INC;
- else if (d == '=')
- t = Token.OP_ADD_ASSIGN;
- else
- return Token.PLUS;
- doread = true;
- return t;
- }
- if (c == '-'){
- if (d == '-')
- t = Token.OP_DEC;
- else if (d == '=')
- t = Token.OP_SUB_ASSIGN;
- else if (d == '>')
- t = Token.OP_PTR;
- else
- return Token.MINUS;
- doread = true;
- return t;
- }
-
- if (c == '!'){
- if (d == '='){
- doread = true;
- return Token.OP_NE;
- }
- return Token.BANG;
- }
-
- if (c == '='){
- if (d == '='){
- doread = true;
- return Token.OP_EQ;
- }
- return Token.ASSIGN;
- }
-
- if (c == '&'){
- if (d == '&'){
- doread = true;
- return Token.OP_AND;
- } else if (d == '='){
- doread = true;
- return Token.OP_AND_ASSIGN;
- }
- return Token.BITWISE_AND;
- }
-
- if (c == '|'){
- if (d == '|'){
- doread = true;
- return Token.OP_OR;
- } else if (d == '='){
- doread = true;
- return Token.OP_OR_ASSIGN;
- }
- return Token.BITWISE_OR;
- }
-
- if (c == '*'){
- if (d == '='){
- doread = true;
- return Token.OP_MULT_ASSIGN;
- }
- return Token.STAR;
- }
-
- if (c == '/'){
- if (d == '='){
- doread = true;
- return Token.OP_DIV_ASSIGN;
- }
- return Token.DIV;
- }
-
- if (c == '%'){
- if (d == '='){
- doread = true;
- return Token.OP_MOD_ASSIGN;
- }
- return Token.PERCENT;
- }
-
- if (c == '^'){
- if (d == '='){
- doread = true;
- return Token.OP_XOR_ASSIGN;
- }
- return Token.CARRET;
- }
-
-#if FIXME
- if (c == '>'){
- if (deambiguate_greater_than == 0)
- return Token.OP_GT;
-
- --deambiguate_greater_than;
-
- // Save current position and parse next token.
- int old = reader.Position;
- int new_token = token ();
- reader.Position = old;
- putback_char = -1;
-
- switch (new_token) {
- case Token.OPEN_PARENS:
- case Token.CLOSE_PARENS:
- case Token.CLOSE_BRACKET:
- case Token.OP_GT:
- case Token.COLON:
- case Token.SEMICOLON:
- case Token.COMMA:
- case Token.DOT:
- case Token.INTERR:
- return Token.OP_GENERICS_GT;
-
- default:
- return Token.OP_GT;
- }
- }
-#endif
-
- return Token.ERROR;
- }
-
- int deambiguate_close_parens = 0;
-
- public void Deambiguate_CloseParens ()
- {
- putback (')');
- deambiguate_close_parens++;
- }
-
- void Error_NumericConstantTooLong ()
- {
- Report.Error (1021, Location, "Numeric constant too long");
- }
-
- bool decimal_digits (int c)
- {
- int d;
- bool seen_digits = false;
-
- if (c != -1){
- if (number_pos == max_number_size)
- Error_NumericConstantTooLong ();
- number_builder [number_pos++] = (char) c;
- }
-
- //
- // We use peekChar2, because decimal_digits needs to do a
- // 2-character look-ahead (5.ToString for example).
- //
- while ((d = peekChar2 ()) != -1){
- if (d >= '0' && d <= '9'){
- if (number_pos == max_number_size)
- Error_NumericConstantTooLong ();
- number_builder [number_pos++] = (char) d;
- getChar ();
- seen_digits = true;
- } else
- break;
- }
-
- return seen_digits;
- }
-
- bool is_hex (int e)
- {
- return (e >= '0' && e <= '9') || (e >= 'A' && e <= 'F') || (e >= 'a' && e <= 'f');
- }
-
- void hex_digits (int c)
- {
- if (c != -1)
- number_builder [number_pos++] = (char) c;
-
- }
-
- int real_type_suffix (int c)
- {
- int t;
-
- switch (c){
- case 'F': case 'f':
- t = Token.LITERAL_FLOAT;
- break;
- case 'D': case 'd':
- t = Token.LITERAL_DOUBLE;
- break;
- case 'M': case 'm':
- t= Token.LITERAL_DECIMAL;
- break;
- default:
- return Token.NONE;
- }
- return t;
- }
-
- int integer_type_suffix (ulong ul, int c)
- {
- bool is_unsigned = false;
- bool is_long = false;
-
- if (c != -1){
- bool scanning = true;
- do {
- switch (c){
- case 'U': case 'u':
- if (is_unsigned)
- scanning = false;
- is_unsigned = true;
- getChar ();
- break;
-
- case 'l':
- if (!is_unsigned){
- //
- // if we have not seen anything in between
- // report this error
- //
- Report.Warning (
- 78, Location,
- "the 'l' suffix is easily confused with digit `1'," +
- " use 'L' for clarity");
- }
- goto case 'L';
-
- case 'L':
- if (is_long)
- scanning = false;
- is_long = true;
- getChar ();
- break;
-
- default:
- scanning = false;
- break;
- }
- c = peekChar ();
- } while (scanning);
- }
-
- if (is_long && is_unsigned){
- val = ul;
- return Token.LITERAL_INTEGER;
- } else if (is_unsigned){
- // uint if possible, or ulong else.
-
- if ((ul & 0xffffffff00000000) == 0)
- val = (uint) ul;
- else
- val = ul;
- } else if (is_long){
- // long if possible, ulong otherwise
- if ((ul & 0x8000000000000000) != 0)
- val = ul;
- else
- val = (long) ul;
- } else {
- // int, uint, long or ulong in that order
- if ((ul & 0xffffffff00000000) == 0){
- uint ui = (uint) ul;
-
- if ((ui & 0x80000000) != 0)
- val = ui;
- else
- val = (int) ui;
- } else {
- if ((ul & 0x8000000000000000) != 0)
- val = ul;
- else
- val = (long) ul;
- }
- }
- return Token.LITERAL_INTEGER;
- }
-
- //
- // given `c' as the next char in the input decide whether
- // we need to convert to a special type, and then choose
- // the best representation for the integer
- //
- int adjust_int (int c)
- {
- try {
- if (number_pos > 9){
- ulong ul = (uint) (number_builder [0] - '0');
-
- for (int i = 1; i < number_pos; i++){
- ul = checked ((ul * 10) + ((uint)(number_builder [i] - '0')));
- }
- return integer_type_suffix (ul, c);
- } else {
- uint ui = (uint) (number_builder [0] - '0');
-
- for (int i = 1; i < number_pos; i++){
- ui = checked ((ui * 10) + ((uint)(number_builder [i] - '0')));
- }
- return integer_type_suffix (ui, c);
- }
- } catch (OverflowException) {
- error_details = "Integral constant is too large";
- Report.Error (1021, Location, error_details);
- val = 0ul;
- return Token.LITERAL_INTEGER;
- }
- }
-
- int adjust_real (int t)
- {
- string s = new String (number_builder, 0, number_pos);
-
- switch (t){
- case Token.LITERAL_DECIMAL:
- try {
- val = System.Decimal.Parse (s, styles, csharp_format_info);
- } catch (OverflowException) {
- val = 0m;
- error_details = "Floating-point constant is outside the range of the type 'decimal'";
- Report.Error (594, Location, error_details);
- }
- break;
- case Token.LITERAL_FLOAT:
- try {
- val = (float) System.Double.Parse (s, styles, csharp_format_info);
- } catch (OverflowException) {
- val = 0.0f;
- error_details = "Floating-point constant is outside the range of the type 'float'";
- Report.Error (594, Location, error_details);
- }
- break;
-
- case Token.LITERAL_DOUBLE:
- case Token.NONE:
- t = Token.LITERAL_DOUBLE;
- try {
- val = System.Double.Parse (s, styles, csharp_format_info);
- } catch (OverflowException) {
- val = 0.0;
- error_details = "Floating-point constant is outside the range of the type 'double'";
- Report.Error (594, Location, error_details);
- }
- break;
- }
- return t;
- }
-
- int handle_hex ()
- {
- int d;
- ulong ul;
-
- getChar ();
- while ((d = peekChar ()) != -1){
- if (is_hex (d)){
- if (number_pos == 16){
- Report.Error (1021, Location, "Integral constant too large");
- return Token.ERROR;
- }
- number_builder [number_pos++] = (char) d;
- getChar ();
- } else
- break;
- }
-
- string s = new String (number_builder, 0, number_pos);
- if (number_pos <= 8)
- ul = System.UInt32.Parse (s, NumberStyles.HexNumber);
- else
- ul = System.UInt64.Parse (s, NumberStyles.HexNumber);
- return integer_type_suffix (ul, peekChar ());
- }
-
- //
- // Invoked if we know we have .digits or digits
- //
- int is_number (int c)
- {
- bool is_real = false;
- int type;
-
- number_pos = 0;
-
- if (c >= '0' && c <= '9'){
- if (c == '0'){
- int peek = peekChar ();
-
- if (peek == 'x' || peek == 'X')
- return handle_hex ();
- }
- decimal_digits (c);
- c = getChar ();
- }
-
- //
- // We need to handle the case of
- // "1.1" vs "1.string" (LITERAL_FLOAT vs NUMBER DOT IDENTIFIER)
- //
- if (c == '.'){
- if (decimal_digits ('.')){
- is_real = true;
- c = getChar ();
- } else {
- putback ('.');
- number_pos--;
- return adjust_int (-1);
- }
- }
-
- if (c == 'e' || c == 'E'){
- is_real = true;
- if (number_pos == max_number_size)
- Error_NumericConstantTooLong ();
- number_builder [number_pos++] = 'e';
- c = getChar ();
-
- if (c == '+'){
- if (number_pos == max_number_size)
- Error_NumericConstantTooLong ();
- number_builder [number_pos++] = '+';
- c = -1;
- } else if (c == '-') {
- if (number_pos == max_number_size)
- Error_NumericConstantTooLong ();
- number_builder [number_pos++] = '-';
- c = -1;
- } else {
- if (number_pos == max_number_size)
- Error_NumericConstantTooLong ();
- number_builder [number_pos++] = '+';
- }
-
- decimal_digits (c);
- c = getChar ();
- }
-
- type = real_type_suffix (c);
- if (type == Token.NONE && !is_real){
- putback (c);
- return adjust_int (c);
- } else
- is_real = true;
-
- if (type == Token.NONE){
- putback (c);
- }
-
- if (is_real)
- return adjust_real (type);
-
- Console.WriteLine ("This should not be reached");
- throw new Exception ("Is Number should never reach this point");
- }
-
- //
- // Accepts exactly count (4 or 8) hex, no more no less
- //
- int getHex (int count, out bool error)
- {
- int [] buffer = new int [8];
- int i;
- int total = 0;
- int c;
- int top = count != -1 ? count : 4;
-
- getChar ();
- error = false;
- for (i = 0; i < top; i++){
- c = getChar ();
-
- if (c >= '0' && c <= '9')
- c = (int) c - (int) '0';
- else if (c >= 'A' && c <= 'F')
- c = (int) c - (int) 'A' + 10;
- else if (c >= 'a' && c <= 'f')
- c = (int) c - (int) 'a' + 10;
- else {
- error = true;
- return 0;
- }
-
- total = (total * 16) + c;
- if (count == -1){
- int p = peekChar ();
- if (p == -1)
- break;
- if (!is_hex ((char)p))
- break;
- }
- }
- return total;
- }
-
- int escape (int c)
- {
- bool error;
- int d;
- int v;
-
- d = peekChar ();
- if (c != '\\')
- return c;
-
- switch (d){
- case 'a':
- v = '\a'; break;
- case 'b':
- v = '\b'; break;
- case 'n':
- v = '\n'; break;
- case 't':
- v = '\t'; break;
- case 'v':
- v = '\v'; break;
- case 'r':
- v = '\r'; break;
- case '\\':
- v = '\\'; break;
- case 'f':
- v = '\f'; break;
- case '0':
- v = 0; break;
- case '"':
- v = '"'; break;
- case '\'':
- v = '\''; break;
- case 'x':
- v = getHex (-1, out error);
- if (error)
- goto default;
- return v;
- case 'u':
- v = getHex (4, out error);
- if (error)
- goto default;
- return v;
- case 'U':
- v = getHex (8, out error);
- if (error)
- goto default;
- return v;
- default:
- Report.Error (1009, Location, "Unrecognized escape sequence in " + (char)d);
- return d;
- }
- getChar ();
- return v;
- }
-
- int getChar ()
- {
- if (putback_char != -1){
- int x = putback_char;
- putback_char = -1;
-
- return x;
- }
- return reader.Read ();
- }
-
- int peekChar ()
- {
- if (putback_char != -1)
- return putback_char;
- putback_char = reader.Read ();
- return putback_char;
- }
-
- int peekChar2 ()
- {
- if (putback_char != -1)
- return putback_char;
- return reader.Peek ();
- }
-
- void putback (int c)
- {
- if (putback_char != -1){
- Console.WriteLine ("Col: " + col);
- Console.WriteLine ("Row: " + line);
- Console.WriteLine ("Name: " + ref_name.Name);
- Console.WriteLine ("Current [{0}] putting back [{1}] ", putback_char, c);
- throw new Exception ("This should not happen putback on putback");
- }
- putback_char = c;
- }
-
- public bool advance ()
- {
- return peekChar () != -1;
- }
-
- public Object Value {
- get {
- return val;
- }
- }
-
- public Object value ()
- {
- return val;
- }
-
- bool IsCastToken (int token)
- {
- switch (token) {
- case Token.BANG:
- case Token.TILDE:
- case Token.IDENTIFIER:
- case Token.LITERAL_INTEGER:
- case Token.LITERAL_FLOAT:
- case Token.LITERAL_DOUBLE:
- case Token.LITERAL_DECIMAL:
- case Token.LITERAL_CHARACTER:
- case Token.LITERAL_STRING:
- case Token.BASE:
- case Token.CHECKED:
- case Token.FALSE:
- case Token.FIXED:
- case Token.NEW:
- case Token.NULL:
- case Token.SIZEOF:
- case Token.THIS:
- case Token.THROW:
- case Token.TRUE:
- case Token.TYPEOF:
- case Token.UNCHECKED:
- case Token.UNSAFE:
- return true;
-
- default:
- return false;
- }
- }
-
- public int token ()
- {
- current_token = xtoken ();
- return current_token;
- }
-
- static StringBuilder static_cmd_arg = new System.Text.StringBuilder ();
-
- void get_cmd_arg (out string cmd, out string arg)
- {
- int c;
-
- tokens_seen = false;
- arg = "";
- static_cmd_arg.Length = 0;
-
- while ((c = getChar ()) != -1 && (c != '\n') && (c != ' ') && (c != '\t') && (c != '\r')){
- static_cmd_arg.Append ((char) c);
- }
-
- cmd = static_cmd_arg.ToString ();
-
- if (c == '\n'){
- line++;
- ref_line++;
- return;
- } else if (c == '\r')
- col = 0;
-
- // skip over white space
- while ((c = getChar ()) != -1 && (c != '\n') && ((c == '\r') || (c == ' ') || (c == '\t')))
- ;
-
- if (c == '\n'){
- line++;
- ref_line++;
- return;
- } else if (c == '\r'){
- col = 0;
- return;
- }
-
- static_cmd_arg.Length = 0;
- static_cmd_arg.Append ((char) c);
-
- while ((c = getChar ()) != -1 && (c != '\n') && (c != '\r')){
- static_cmd_arg.Append ((char) c);
- }
-
- if (c == '\n'){
- line++;
- ref_line++;
- } else if (c == '\r')
- col = 0;
- arg = static_cmd_arg.ToString ().Trim ();
- }
-
- //
- // Handles the #line directive
- //
- bool PreProcessLine (string arg)
- {
- if (arg == "")
- return false;
-
- if (arg == "default"){
- ref_line = line;
- ref_name = file_name;
- Location.Push (ref_name);
- return true;
- }
-
- try {
- int pos;
-
- if ((pos = arg.IndexOf (' ')) != -1 && pos != 0){
- ref_line = System.Int32.Parse (arg.Substring (0, pos));
- pos++;
-
- char [] quotes = { '\"' };
-
- string name = arg.Substring (pos). Trim (quotes);
- ref_name = Location.LookupFile (name);
- Location.Push (ref_name);
- } else {
- ref_line = System.Int32.Parse (arg);
- }
- } catch {
- return false;
- }
-
- return true;
- }
-
- //
- // Handles #define and #undef
- //
- void PreProcessDefinition (bool is_define, string arg)
- {
- if (arg == "" || 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");
- return;
- }
-
- foreach (char c in arg){
- if (!Char.IsLetter (c) && (c != '_')){
- Report.Error (1001, Location, "Identifier expected");
- return;
- }
- }
-
- if (is_define){
- if (defines == null)
- defines = new Hashtable ();
- define (arg);
- } else {
- if (defines == null)
- return;
- if (defines.Contains (arg))
- defines.Remove (arg);
- }
- }
-
- bool eval_val (string s)
- {
- if (s == "true")
- return true;
- if (s == "false")
- return false;
-
- if (defines == null)
- return false;
- if (defines.Contains (s))
- return true;
-
- return false;
- }
-
- bool pp_primary (ref string s)
- {
- s = s.Trim ();
- int len = s.Length;
-
- if (len > 0){
- char c = s [0];
-
- if (c == '('){
- s = s.Substring (1);
- bool val = pp_expr (ref s);
- if (s.Length > 0 && s [0] == ')'){
- s = s.Substring (1);
- return val;
- }
- Error_InvalidDirective ();
- return false;
- }
-
- if (is_identifier_start_character (c)){
- int j = 1;
-
- while (j < len){
- c = s [j];
-
- if (is_identifier_part_character (c)){
- j++;
- continue;
- }
- bool v = eval_val (s.Substring (0, j));
- s = s.Substring (j);
- return v;
- }
- bool vv = eval_val (s);
- s = "";
- return vv;
- }
- }
- Error_InvalidDirective ();
- return false;
- }
-
- bool pp_unary (ref string s)
- {
- s = s.Trim ();
- int len = s.Length;
-
- if (len > 0){
- if (s [0] == '!'){
- if (len > 1 && s [1] == '='){
- Error_InvalidDirective ();
- return false;
- }
- s = s.Substring (1);
- return ! pp_primary (ref s);
- } else
- return pp_primary (ref s);
- } else {
- Error_InvalidDirective ();
- return false;
- }
- }
-
- bool pp_eq (ref string s)
- {
- bool va = pp_unary (ref s);
-
- s = s.Trim ();
- int len = s.Length;
- if (len > 0){
- if (s [0] == '='){
- if (len > 2 && s [1] == '='){
- s = s.Substring (2);
- return va == pp_unary (ref s);
- } else {
- Error_InvalidDirective ();
- return false;
- }
- } else if (s [0] == '!' && len > 1 && s [1] == '='){
- s = s.Substring (2);
-
- return va != pp_unary (ref s);
-
- }
- }
-
- return va;
-
- }
-
- bool pp_and (ref string s)
- {
- bool va = pp_eq (ref s);
-
- s = s.Trim ();
- int len = s.Length;
- if (len > 0){
- if (s [0] == '&'){
- if (len > 2 && s [1] == '&'){
- s = s.Substring (2);
- return (va & pp_eq (ref s));
- } else {
- Error_InvalidDirective ();
- return false;
- }
- }
- }
- return va;
- }
-
- //
- // Evaluates an expression for `#if' or `#elif'
- //
- bool pp_expr (ref string s)
- {
- bool va = pp_and (ref s);
- s = s.Trim ();
- int len = s.Length;
- if (len > 0){
- char c = s [0];
-
- if (c == '|'){
- if (len > 2 && s [1] == '|'){
- s = s.Substring (2);
- return va | pp_expr (ref s);
- } else {
- Error_InvalidDirective ();
- return false;
- }
- }
- }
-
- return va;
- }
-
- bool eval (string s)
- {
- bool v = pp_expr (ref s);
- s = s.Trim ();
- if (s.Length != 0){
- Error_InvalidDirective ();
- return false;
- }
-
- return v;
- }
-
- void Error_InvalidDirective ()
- {
- Report.Error (1517, Location, "Invalid pre-processor directive");
- }
-
- void Error_UnexpectedDirective (string extra)
- {
- Report.Error (
- 1028, Location,
- "Unexpected processor directive (" + extra + ")");
- }
-
- void Error_TokensSeen ()
- {
- Report.Error (
- 1032, Location,
- "Cannot define or undefine pre-processor symbols after a token in the file");
- }
-
- //
- // if true, then the code continues processing the code
- // if false, the code stays in a loop until another directive is
- // reached.
- //
- bool handle_preprocessing_directive (bool caller_is_taking)
- {
- char [] blank = { ' ', '\t' };
- string cmd, arg;
- bool region_directive = false;
-
- get_cmd_arg (out cmd, out arg);
-
- // Eat any trailing whitespaces and single-line comments
- if (arg.IndexOf ("//") != -1)
- arg = arg.Substring (0, arg.IndexOf ("//"));
- arg = arg.TrimEnd (' ', '\t');
-
- //
- // The first group of pre-processing instructions is always processed
- //
- switch (cmd){
- case "pragma":
- if (RootContext.V2)
- return true;
- break;
-
- case "line":
- if (!PreProcessLine (arg))
- Report.Error (
- 1576, Location,
- "Argument to #line directive is missing or invalid");
- return true;
-
- case "region":
- region_directive = true;
- arg = "true";
- goto case "if";
-
- case "endregion":
- region_directive = true;
- goto case "endif";
-
- case "if":
- if (arg == ""){
- Error_InvalidDirective ();
- return true;
- }
- bool taking = false;
- if (ifstack == null)
- ifstack = new Stack ();
-
- if (ifstack.Count == 0){
- taking = true;
- } else {
- int state = (int) ifstack.Peek ();
- if ((state & TAKING) != 0)
- taking = true;
- }
-
- if (eval (arg) && taking){
- int push = TAKING | TAKEN_BEFORE | PARENT_TAKING;
- if (region_directive)
- push |= REGION;
- ifstack.Push (push);
- return true;
- } else {
- int push = (taking ? PARENT_TAKING : 0);
- if (region_directive)
- push |= REGION;
- ifstack.Push (push);
- 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 ();
-
- if (region_directive && ((pop & REGION) == 0))
- Report.Error (1027, Location, "#endif directive expected");
- else if (!region_directive && ((pop & REGION) != 0))
- Report.Error (1038, Location, "#endregion directive expected");
-
- if (ifstack.Count == 0)
- return true;
- else {
- int state = (int) ifstack.Peek ();
-
- if ((state & TAKING) != 0)
- return true;
- else
- return false;
- }
- }
-
- case "elif":
- if (ifstack == null || ifstack.Count == 0){
- Error_UnexpectedDirective ("no #if for this #elif");
- return true;
- } else {
- int state = (int) ifstack.Peek ();
-
- if ((state & REGION) != 0) {
- Report.Error (1038, Location, "#endregion directive expected");
- return true;
- }
-
- if ((state & ELSE_SEEN) != 0){
- Error_UnexpectedDirective ("#elif not valid after #else");
- return true;
- }
-
- if ((state & (TAKEN_BEFORE | TAKING)) != 0)
- return false;
-
- if (eval (arg) && ((state & PARENT_TAKING) != 0)){
- state = (int) ifstack.Pop ();
- ifstack.Push (state | TAKING | TAKEN_BEFORE);
- return true;
- } else
- return false;
- }
-
- case "else":
- if (ifstack == null || ifstack.Count == 0){
- Report.Error (
- 1028, Location,
- "Unexpected processor directive (no #if for this #else)");
- return true;
- } else {
- int state = (int) ifstack.Peek ();
-
- if ((state & REGION) != 0) {
- Report.Error (1038, Location, "#endregion directive expected");
- return true;
- }
-
- if ((state & ELSE_SEEN) != 0){
- Error_UnexpectedDirective ("#else within #else");
- return true;
- }
-
- ifstack.Pop ();
-
- bool ret;
- if ((state & TAKEN_BEFORE) == 0){
- ret = ((state & PARENT_TAKING) != 0);
- } else
- ret = false;
-
- if (ret)
- state |= TAKING;
- else
- state &= ~TAKING;
-
- ifstack.Push (state | ELSE_SEEN);
-
- return ret;
- }
- }
-
- //
- // These are only processed if we are in a `taking' block
- //
- if (!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, Location, "#warning: '" + arg + "'");
- return true;
- }
-
- Report.Error (1024, Location, "Preprocessor directive expected (got: " + cmd + ")");
- return true;
-
- }
-
- private int consume_string (bool quoted)
- {
- int c;
- string_builder.Length = 0;
-
- while ((c = getChar ()) != -1){
- if (c == '"'){
- if (quoted && peekChar () == '"'){
- string_builder.Append ((char) c);
- getChar ();
- continue;
- } else {
- val = string_builder.ToString ();
- return Token.LITERAL_STRING;
- }
- }
-
- if (c == '\n'){
- if (!quoted)
- Report.Error (1010, Location, "Newline in constant");
- line++;
- ref_line++;
- col = 0;
- } else
- col++;
-
- if (!quoted){
- c = escape (c);
- if (c == -1)
- return Token.ERROR;
- }
- string_builder.Append ((char) c);
- }
-
- Report.Error (1039, Location, "Unterminated string literal");
- return Token.EOF;
- }
-
- private int consume_identifier (int s, bool quoted)
- {
- int pos = 1;
- int c;
-
- id_builder [0] = (char) s;
-
- while ((c = reader.Read ()) != -1) {
- if (is_identifier_part_character ((char) c)){
- if (pos == max_id_size){
- Report.Error (645, Location, "Identifier too long (limit is 512 chars)");
- return Token.ERROR;
- }
-
- id_builder [pos++] = (char) c;
- putback_char = -1;
- col++;
- } else {
- putback_char = c;
- break;
- }
- }
-
- string ids = new String (id_builder, 0, pos);
-
- //
- // Optimization: avoids doing the keyword lookup
- // on uppercase letters and _
- //
- if (s >= 'a'){
- int keyword = GetKeyword (ids);
- if (keyword == -1 || quoted){
- val = ids;
- return Token.IDENTIFIER;
- }
- return keyword;
- }
- val = ids;
- return Token.IDENTIFIER;
- }
-
- public int xtoken ()
- {
- int t;
- bool doread = false;
- int c;
-
- val = null;
- // optimization: eliminate col and implement #directive semantic correctly.
- for (;(c = getChar ()) != -1; col++) {
- if (c == ' ' || c == '\t' || c == '\f' || c == '\v' || c == '\r' || c == 0xa0){
-
- if (c == '\t')
- col = (((col + 8) / 8) * 8) - 1;
- continue;
- }
-
- // Handle double-slash comments.
- if (c == '/'){
- int d = peekChar ();
-
- if (d == '/'){
- getChar ();
- while ((d = getChar ()) != -1 && (d != '\n') && d != '\r')
- col++;
- if (d == '\n'){
- line++;
- ref_line++;
- col = 0;
- }
- any_token_seen |= tokens_seen;
- tokens_seen = false;
- continue;
- } else if (d == '*'){
- getChar ();
-
- while ((d = getChar ()) != -1){
- if (d == '*' && peekChar () == '/'){
- getChar ();
- col++;
- break;
- }
- if (d == '\n'){
- line++;
- ref_line++;
- col = 0;
- any_token_seen |= tokens_seen;
- tokens_seen = false;
- }
- }
- continue;
- }
- goto is_punct_label;
- }
-
-
- if (is_identifier_start_character ((char)c)){
- tokens_seen = true;
- return consume_identifier (c, false);
- }
-
- is_punct_label:
- if ((t = is_punct ((char)c, ref doread)) != Token.ERROR){
- tokens_seen = true;
- if (doread){
- getChar ();
- col++;
- }
- return t;
- }
-
- // white space
- if (c == '\n'){
- line++;
- ref_line++;
- col = 0;
- any_token_seen |= tokens_seen;
- tokens_seen = false;
- continue;
- }
-
- if (c >= '0' && c <= '9'){
- tokens_seen = true;
- return is_number (c);
- }
-
- if (c == '.'){
- tokens_seen = true;
- int peek = peekChar ();
- if (peek >= '0' && peek <= '9')
- return is_number (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 == '#' && !tokens_seen){
- bool cont = true;
-
- start_again:
-
- cont = handle_preprocessing_directive (cont);
-
- if (cont){
- col = 0;
- continue;
- }
- col = 1;
-
- bool skipping = false;
- for (;(c = getChar ()) != -1; col++){
- if (c == '\n'){
- col = 0;
- line++;
- ref_line++;
- 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;
- }
- any_token_seen |= tokens_seen;
- tokens_seen = false;
- if (c == -1)
- Report.Error (1027, Location, "#endif/#endregion expected");
- continue;
- }
-
- if (c == '"')
- return consume_string (false);
-
- if (c == '\''){
- c = getChar ();
- tokens_seen = true;
- if (c == '\''){
- error_details = "Empty character literal";
- Report.Error (1011, Location, error_details);
- return Token.ERROR;
- }
- c = escape (c);
- if (c == -1)
- return Token.ERROR;
- val = new System.Char ();
- val = (char) c;
- c = getChar ();
-
- if (c != '\''){
- error_details = "Too many characters in character literal";
- Report.Error (1012, Location, error_details);
-
- // Try to recover, read until newline or next "'"
- while ((c = getChar ()) != -1){
- if (c == '\n' || c == '\''){
- line++;
- ref_line++;
- col = 0;
- break;
- } else
- col++;
-
- }
- return Token.ERROR;
- }
- return Token.LITERAL_CHARACTER;
- }
-
- if (c == '@') {
- c = getChar ();
- if (c == '"') {
- tokens_seen = true;
- return consume_string (true);
- } else if (is_identifier_start_character ((char) c)){
- return consume_identifier (c, true);
- } else {
- Report.Error (1033, Location, "'@' must be followed by string constant or identifier");
- }
- }
-
- if (c == '#') {
- error_details = "Preprocessor directives must appear as the first non-whitespace " +
- "character on a line.";
-
- Report.Error (1040, Location, error_details);
-
- return Token.ERROR;
- }
-
- error_details = ((char)c).ToString ();
-
- return Token.ERROR;
- }
-
- return Token.EOF;
- }
-
- public void cleanup ()
- {
- if (ifstack != null && ifstack.Count >= 1) {
- int state = (int) ifstack.Pop ();
- if ((state & REGION) != 0)
- Report.Error (1038, "#endregion directive expected");
- else
- Report.Error (1027, "#endif directive expected");
- }
-
- }
-
- }
-}
-
+//
+// cs-tokenizer.cs: The Tokenizer for the C# compiler
+// This also implements the preprocessor
+//
+// Author: Miguel de Icaza (miguel@gnu.org)
+//
+// 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;
+using System.Collections;
+using System.IO;
+using System.Globalization;
+using System.Reflection;
+
+namespace Mono.CSharp
+{
+ ///
+ /// Tokenizer for C# source code.
+ ///
+
+ public class Tokenizer : yyParser.yyInput
+ {
+ SeekableStreamReader reader;
+ SourceFile ref_name;
+ SourceFile file_name;
+ int ref_line = 1;
+ int line = 1;
+ int col = 0;
+ int previous_col;
+ int current_token;
+ bool handle_get_set = false;
+ bool handle_remove_add = false;
+ bool handle_assembly = false;
+ bool handle_constraints = false;
+ bool handle_typeof = false;
+ Location current_location;
+ Location current_comment_location = Location.Null;
+ ArrayList escapedIdentifiers = new ArrayList ();
+
+ //
+ // XML documentation buffer. The save point is used to divide
+ // comments on types and comments on members.
+ //
+ StringBuilder xml_comment_buffer;
+
+ //
+ // See comment on XmlCommentState enumeration.
+ //
+ XmlCommentState xmlDocState = XmlCommentState.Allowed;
+
+ //
+ // Whether tokens have been seen on this line
+ //
+ bool tokens_seen = false;
+
+ //
+ // Whether a token has been seen on the file
+ // This is needed because `define' is not allowed to be used
+ // after a token has been seen.
+ //
+ bool any_token_seen = false;
+
+ static Hashtable tokenValues;
+
+ private static Hashtable TokenValueName
+ {
+ get {
+ if (tokenValues == null)
+ tokenValues = GetTokenValueNameHash ();
+
+ return tokenValues;
+ }
+ }
+
+ private static Hashtable GetTokenValueNameHash ()
+ {
+ Type t = typeof (Token);
+ FieldInfo [] fields = t.GetFields ();
+ Hashtable hash = new Hashtable ();
+ foreach (FieldInfo field in fields) {
+ if (field.IsLiteral && field.IsStatic && field.FieldType == typeof (int))
+ hash.Add (field.GetValue (null), field.Name);
+ }
+ return hash;
+ }
+
+ //
+ // Returns a verbose representation of the current location
+ //
+ public string location {
+ get {
+ string det;
+
+ if (current_token == Token.ERROR)
+ det = "detail: " + error_details;
+ else
+ det = "";
+
+ // return "Line: "+line+" Col: "+col + "\n" +
+ // "VirtLine: "+ref_line +
+ // " Token: "+current_token + " " + det;
+ string current_token_name = TokenValueName [current_token] as string;
+ if (current_token_name == null)
+ current_token_name = current_token.ToString ();
+
+ return String.Format ("{0} ({1},{2}), Token: {3} {4}", ref_name.Name,
+ ref_line,
+ col,
+ current_token_name,
+ det);
+ }
+ }
+
+ public bool PropertyParsing {
+ get {
+ return handle_get_set;
+ }
+
+ set {
+ handle_get_set = value;
+ }
+ }
+
+ public bool AssemblyTargetParsing {
+ get {
+ return handle_assembly;
+ }
+
+ set {
+ handle_assembly = value;
+ }
+ }
+
+ public bool EventParsing {
+ get {
+ return handle_remove_add;
+ }
+
+ set {
+ handle_remove_add = value;
+ }
+ }
+
+ 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 {
+ if (value == XmlCommentState.Allowed) {
+ check_incorrect_doc_comment ();
+ reset_doc_comment ();
+ }
+ xmlDocState = value;
+ }
+ }
+
+ public bool IsEscapedIdentifier (Location loc)
+ {
+ foreach (LocatedToken lt in escapedIdentifiers)
+ if (lt.Location.Equals (loc))
+ return true;
+ return false;
+ }
+
+ //
+ // Class variables
+ //
+ static CharArrayHashtable[] keywords;
+ static Hashtable keywordStrings = new Hashtable ();
+ static NumberStyles styles;
+ static NumberFormatInfo csharp_format_info;
+
+ //
+ // Values for the associated token returned
+ //
+ int putback_char;
+ Object val;
+
+ //
+ // Pre-processor
+ //
+ 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;
+
+ //
+ // pre-processor if stack state:
+ //
+ Stack ifstack;
+
+ static System.Text.StringBuilder string_builder;
+
+ const int max_id_size = 512;
+ static char [] id_builder = new char [max_id_size];
+
+ static CharArrayHashtable [] identifiers = new CharArrayHashtable [max_id_size + 1];
+
+ const int max_number_size = 512;
+ static char [] number_builder = new char [max_number_size];
+ static int number_pos;
+
+ //
+ // Details about the error encoutered by the tokenizer
+ //
+ string error_details;
+
+ public string error {
+ get {
+ return error_details;
+ }
+ }
+
+ public int Line {
+ get {
+ return ref_line;
+ }
+ }
+
+ public int Col {
+ get {
+ return col;
+ }
+ }
+
+ static void AddKeyword (string kw, int token) {
+ keywordStrings.Add (kw, kw);
+ if (keywords [kw.Length] == null) {
+ keywords [kw.Length] = new CharArrayHashtable (kw.Length);
+ }
+ keywords [kw.Length] [kw.ToCharArray ()] = token;
+ }
+
+ static void InitTokens ()
+ {
+ keywords = new CharArrayHashtable [64];
+
+ AddKeyword ("__arglist", Token.ARGLIST);
+ AddKeyword ("abstract", Token.ABSTRACT);
+ AddKeyword ("as", Token.AS);
+ AddKeyword ("add", Token.ADD);
+ AddKeyword ("assembly", Token.ASSEMBLY);
+ AddKeyword ("base", Token.BASE);
+ AddKeyword ("bool", Token.BOOL);
+ AddKeyword ("break", Token.BREAK);
+ AddKeyword ("byte", Token.BYTE);
+ AddKeyword ("case", Token.CASE);
+ AddKeyword ("catch", Token.CATCH);
+ AddKeyword ("char", Token.CHAR);
+ AddKeyword ("checked", Token.CHECKED);
+ AddKeyword ("class", Token.CLASS);
+ AddKeyword ("const", Token.CONST);
+ AddKeyword ("continue", Token.CONTINUE);
+ AddKeyword ("decimal", Token.DECIMAL);
+ AddKeyword ("default", Token.DEFAULT);
+ AddKeyword ("delegate", Token.DELEGATE);
+ AddKeyword ("do", Token.DO);
+ AddKeyword ("double", Token.DOUBLE);
+ AddKeyword ("else", Token.ELSE);
+ AddKeyword ("enum", Token.ENUM);
+ AddKeyword ("event", Token.EVENT);
+ AddKeyword ("explicit", Token.EXPLICIT);
+ AddKeyword ("extern", Token.EXTERN);
+ AddKeyword ("false", Token.FALSE);
+ AddKeyword ("finally", Token.FINALLY);
+ AddKeyword ("fixed", Token.FIXED);
+ AddKeyword ("float", Token.FLOAT);
+ AddKeyword ("for", Token.FOR);
+ AddKeyword ("foreach", Token.FOREACH);
+ AddKeyword ("goto", Token.GOTO);
+ AddKeyword ("get", Token.GET);
+ AddKeyword ("if", Token.IF);
+ AddKeyword ("implicit", Token.IMPLICIT);
+ AddKeyword ("in", Token.IN);
+ AddKeyword ("int", Token.INT);
+ AddKeyword ("interface", Token.INTERFACE);
+ AddKeyword ("internal", Token.INTERNAL);
+ AddKeyword ("is", Token.IS);
+ AddKeyword ("lock", Token.LOCK);
+ AddKeyword ("long", Token.LONG);
+ AddKeyword ("namespace", Token.NAMESPACE);
+ AddKeyword ("new", Token.NEW);
+ AddKeyword ("null", Token.NULL);
+ AddKeyword ("object", Token.OBJECT);
+ AddKeyword ("operator", Token.OPERATOR);
+ AddKeyword ("out", Token.OUT);
+ AddKeyword ("override", Token.OVERRIDE);
+ AddKeyword ("params", Token.PARAMS);
+ AddKeyword ("private", Token.PRIVATE);
+ AddKeyword ("protected", Token.PROTECTED);
+ AddKeyword ("public", Token.PUBLIC);
+ AddKeyword ("readonly", Token.READONLY);
+ AddKeyword ("ref", Token.REF);
+ AddKeyword ("remove", Token.REMOVE);
+ AddKeyword ("return", Token.RETURN);
+ AddKeyword ("sbyte", Token.SBYTE);
+ AddKeyword ("sealed", Token.SEALED);
+ AddKeyword ("set", Token.SET);
+ AddKeyword ("short", Token.SHORT);
+ AddKeyword ("sizeof", Token.SIZEOF);
+ AddKeyword ("stackalloc", Token.STACKALLOC);
+ AddKeyword ("static", Token.STATIC);
+ AddKeyword ("string", Token.STRING);
+ AddKeyword ("struct", Token.STRUCT);
+ AddKeyword ("switch", Token.SWITCH);
+ AddKeyword ("this", Token.THIS);
+ AddKeyword ("throw", Token.THROW);
+ AddKeyword ("true", Token.TRUE);
+ AddKeyword ("try", Token.TRY);
+ AddKeyword ("typeof", Token.TYPEOF);
+ AddKeyword ("uint", Token.UINT);
+ AddKeyword ("ulong", Token.ULONG);
+ AddKeyword ("unchecked", Token.UNCHECKED);
+ AddKeyword ("unsafe", Token.UNSAFE);
+ AddKeyword ("ushort", Token.USHORT);
+ AddKeyword ("using", Token.USING);
+ AddKeyword ("virtual", Token.VIRTUAL);
+ AddKeyword ("void", Token.VOID);
+ AddKeyword ("volatile", Token.VOLATILE);
+ AddKeyword ("where", Token.WHERE);
+ AddKeyword ("while", Token.WHILE);
+ AddKeyword ("partial", Token.PARTIAL);
+ }
+
+ //
+ // Class initializer
+ //
+ static Tokenizer ()
+ {
+ InitTokens ();
+ csharp_format_info = NumberFormatInfo.InvariantInfo;
+ styles = NumberStyles.Float;
+
+ string_builder = new System.Text.StringBuilder ();
+ }
+
+ int GetKeyword (char[] id, int id_len)
+ {
+ /*
+ * Keywords are stored in an array of hashtables grouped by their
+ * length.
+ */
+
+ if ((id_len >= keywords.Length) || (keywords [id_len] == null))
+ return -1;
+ object o = keywords [id_len] [id];
+
+ if (o == null)
+ return -1;
+
+ int res = (int) o;
+
+ if (handle_get_set == false && (res == Token.GET || res == Token.SET))
+ return -1;
+ if (handle_remove_add == false && (res == Token.REMOVE || res == Token.ADD))
+ return -1;
+ if (handle_assembly == false && res == Token.ASSEMBLY)
+ return -1;
+ if (handle_constraints == false && res == Token.WHERE)
+ return -1;
+
+ return res;
+
+ }
+
+ public Location Location {
+ get { return current_location; }
+ }
+
+ void define (string def)
+ {
+ if (!RootContext.AllDefines.Contains (def)){
+ RootContext.AllDefines [def] = true;
+ }
+ if (defines.Contains (def))
+ return;
+ defines [def] = true;
+ }
+
+ public Tokenizer (SeekableStreamReader input, SourceFile file, ArrayList defs)
+ {
+ this.ref_name = file;
+ this.file_name = file;
+ reader = input;
+
+ putback_char = -1;
+
+ if (defs != null){
+ defines = new Hashtable ();
+ foreach (string def in defs)
+ define (def);
+ }
+
+ xml_comment_buffer = new StringBuilder ();
+
+ //
+ // FIXME: This could be `Location.Push' but we have to
+ // find out why the MS compiler allows this
+ //
+ Mono.CSharp.Location.Push (file, 0);
+ }
+
+ static bool is_identifier_start_character (char 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);
+ }
+
+ public static bool IsKeyword (string s)
+ {
+ return keywordStrings [s] != null;
+ }
+
+ public static bool IsValidIdentifier (string s)
+ {
+ if (s == null || s.Length == 0)
+ return false;
+
+ if (!is_identifier_start_character (s [0]))
+ return false;
+
+ for (int i = 1; i < s.Length; i ++)
+ if (! is_identifier_part_character (s [i]))
+ return false;
+
+ 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 ();
+ 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))
+ goto start;
+ else if (the_token == Token.INTERR)
+ 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;
+ }
+
+ int parsing_generic_less_than = 0;
+
+ int is_punct (char c, ref bool doread)
+ {
+ int d;
+ int t;
+
+ doread = false;
+
+ switch (c){
+ case '{':
+ val = Location;
+ return Token.OPEN_BRACE;
+ case '}':
+ val = Location;
+ return Token.CLOSE_BRACE;
+ case '[':
+ // To block doccomment inside attribute declaration.
+ if (doc_state == XmlCommentState.Allowed)
+ doc_state = XmlCommentState.NotAllowed;
+ return Token.OPEN_BRACKET;
+ case ']':
+ return Token.CLOSE_BRACKET;
+ case '(':
+ 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;
+
+ int new_token = token ();
+ reader.Position = old;
+ ref_line = old_ref_line;
+ col = old_col;
+ putback_char = -1;
+
+ if (new_token == Token.OPEN_PARENS)
+ return Token.CLOSE_PARENS_OPEN_PARENS;
+ else if (new_token == Token.MINUS)
+ return Token.CLOSE_PARENS_MINUS;
+ else if (IsCastToken (new_token))
+ return Token.CLOSE_PARENS_CAST;
+ else
+ return Token.CLOSE_PARENS_NO_CAST;
+ }
+
+ case ',':
+ return Token.COMMA;
+ case ';':
+ val = Location;
+ return Token.SEMICOLON;
+ case '~':
+ val = Location;
+ return Token.TILDE;
+ case '?':
+ return Token.INTERR;
+ }
+
+ if (c == '<') {
+ if (parsing_generic_less_than++ > 0)
+ return Token.OP_GENERICS_LT;
+
+ int old = reader.Position;
+ if (handle_typeof) {
+ int dimension;
+ if (parse_generic_dimension (out dimension)) {
+ val = dimension;
+ return Token.GENERIC_DIMENSION;
+ }
+ reader.Position = old;
+ putback_char = -1;
+ }
+
+ // Save current position and parse next token.
+ old = reader.Position;
+ bool is_generic_lt = parse_less_than ();
+ reader.Position = old;
+ putback_char = -1;
+
+ if (is_generic_lt) {
+ parsing_generic_less_than++;
+ 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;
+ }
+
+ d = peekChar ();
+ if (c == '+'){
+
+ if (d == '+') {
+ val = Location;
+ t = Token.OP_INC;
+ }
+ else if (d == '=')
+ t = Token.OP_ADD_ASSIGN;
+ else {
+ val = Location;
+ return Token.PLUS;
+ }
+ doread = true;
+ return t;
+ }
+ if (c == '-'){
+ if (d == '-') {
+ val = Location;
+ t = Token.OP_DEC;
+ }
+ else if (d == '=')
+ t = Token.OP_SUB_ASSIGN;
+ else if (d == '>')
+ t = Token.OP_PTR;
+ else {
+ val = Location;
+ return Token.MINUS;
+ }
+ doread = true;
+ return t;
+ }
+
+ if (c == '!'){
+ if (d == '='){
+ doread = true;
+ return Token.OP_NE;
+ }
+ val = Location;
+ return Token.BANG;
+ }
+
+ if (c == '='){
+ if (d == '='){
+ doread = true;
+ return Token.OP_EQ;
+ }
+ return Token.ASSIGN;
+ }
+
+ if (c == '&'){
+ if (d == '&'){
+ doread = true;
+ return Token.OP_AND;
+ } else if (d == '='){
+ doread = true;
+ return Token.OP_AND_ASSIGN;
+ }
+ val = Location;
+ return Token.BITWISE_AND;
+ }
+
+ if (c == '|'){
+ if (d == '|'){
+ doread = true;
+ return Token.OP_OR;
+ } else if (d == '='){
+ doread = true;
+ return Token.OP_OR_ASSIGN;
+ }
+ return Token.BITWISE_OR;
+ }
+
+ if (c == '*'){
+ if (d == '='){
+ doread = true;
+ return Token.OP_MULT_ASSIGN;
+ }
+ val = Location;
+ return Token.STAR;
+ }
+
+ if (c == '/'){
+ if (d == '='){
+ doread = true;
+ return Token.OP_DIV_ASSIGN;
+ }
+ return Token.DIV;
+ }
+
+ if (c == '%'){
+ if (d == '='){
+ doread = true;
+ return Token.OP_MOD_ASSIGN;
+ }
+ return Token.PERCENT;
+ }
+
+ if (c == '^'){
+ if (d == '='){
+ doread = true;
+ return Token.OP_XOR_ASSIGN;
+ }
+ return Token.CARRET;
+ }
+
+ if (c == ':'){
+ if (d == ':'){
+ doread = true;
+ return Token.DOUBLE_COLON;
+ }
+ val = Location;
+ return Token.COLON;
+ }
+
+ return Token.ERROR;
+ }
+
+ int deambiguate_close_parens = 0;
+
+ public void Deambiguate_CloseParens ()
+ {
+ putback (')');
+ deambiguate_close_parens++;
+ }
+
+ 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 = ')';
+ }
+
+ void Error_NumericConstantTooLong ()
+ {
+ Report.Error (1021, Location, "Numeric constant too long");
+ }
+
+ int nullable_pos = -1;
+
+ public void CheckNullable (bool is_nullable)
+ {
+ if (is_nullable)
+ nullable_pos = reader.Position;
+ else
+ nullable_pos = -1;
+ }
+
+ bool decimal_digits (int c)
+ {
+ int d;
+ bool seen_digits = false;
+
+ if (c != -1){
+ if (number_pos == max_number_size)
+ Error_NumericConstantTooLong ();
+ number_builder [number_pos++] = (char) c;
+ }
+
+ //
+ // We use peekChar2, because decimal_digits needs to do a
+ // 2-character look-ahead (5.ToString for example).
+ //
+ while ((d = peekChar2 ()) != -1){
+ if (d >= '0' && d <= '9'){
+ if (number_pos == max_number_size)
+ Error_NumericConstantTooLong ();
+ number_builder [number_pos++] = (char) d;
+ getChar ();
+ seen_digits = true;
+ } else
+ break;
+ }
+
+ return seen_digits;
+ }
+
+ bool is_hex (int e)
+ {
+ return (e >= '0' && e <= '9') || (e >= 'A' && e <= 'F') || (e >= 'a' && e <= 'f');
+ }
+
+ int real_type_suffix (int c)
+ {
+ int t;
+
+ switch (c){
+ case 'F': case 'f':
+ t = Token.LITERAL_FLOAT;
+ break;
+ case 'D': case 'd':
+ t = Token.LITERAL_DOUBLE;
+ break;
+ case 'M': case 'm':
+ t= Token.LITERAL_DECIMAL;
+ break;
+ default:
+ return Token.NONE;
+ }
+ return t;
+ }
+
+ int integer_type_suffix (ulong ul, int c)
+ {
+ bool is_unsigned = false;
+ bool is_long = false;
+
+ if (c != -1){
+ bool scanning = true;
+ do {
+ switch (c){
+ case 'U': case 'u':
+ if (is_unsigned)
+ scanning = false;
+ is_unsigned = true;
+ getChar ();
+ break;
+
+ case 'l':
+ if (!is_unsigned && (RootContext.WarningLevel >= 4)){
+ //
+ // if we have not seen anything in between
+ // report this error
+ //
+ Report.Warning (78, Location, "The 'l' suffix is easily confused with the digit '1' (use 'L' for clarity)");
+ }
+ //
+ // This goto statement causes the MS CLR 2.0 beta 1 csc to report an error, so
+ // work around that.
+ //
+ //goto case 'L';
+ if (is_long)
+ scanning = false;
+ is_long = true;
+ getChar ();
+ break;
+
+ case 'L':
+ if (is_long)
+ scanning = false;
+ is_long = true;
+ getChar ();
+ break;
+
+ default:
+ scanning = false;
+ break;
+ }
+ c = peekChar ();
+ } while (scanning);
+ }
+
+ if (is_long && is_unsigned){
+ val = ul;
+ return Token.LITERAL_INTEGER;
+ } else if (is_unsigned){
+ // uint if possible, or ulong else.
+
+ if ((ul & 0xffffffff00000000) == 0)
+ val = (uint) ul;
+ else
+ val = ul;
+ } else if (is_long){
+ // long if possible, ulong otherwise
+ if ((ul & 0x8000000000000000) != 0)
+ val = ul;
+ else
+ val = (long) ul;
+ } else {
+ // int, uint, long or ulong in that order
+ if ((ul & 0xffffffff00000000) == 0){
+ uint ui = (uint) ul;
+
+ if ((ui & 0x80000000) != 0)
+ val = ui;
+ else
+ val = (int) ui;
+ } else {
+ if ((ul & 0x8000000000000000) != 0)
+ val = ul;
+ else
+ val = (long) ul;
+ }
+ }
+ return Token.LITERAL_INTEGER;
+ }
+
+ //
+ // given `c' as the next char in the input decide whether
+ // we need to convert to a special type, and then choose
+ // the best representation for the integer
+ //
+ int adjust_int (int c)
+ {
+ try {
+ if (number_pos > 9){
+ ulong ul = (uint) (number_builder [0] - '0');
+
+ for (int i = 1; i < number_pos; i++){
+ ul = checked ((ul * 10) + ((uint)(number_builder [i] - '0')));
+ }
+ return integer_type_suffix (ul, c);
+ } else {
+ uint ui = (uint) (number_builder [0] - '0');
+
+ for (int i = 1; i < number_pos; i++){
+ ui = checked ((ui * 10) + ((uint)(number_builder [i] - '0')));
+ }
+ return integer_type_suffix (ui, c);
+ }
+ } catch (OverflowException) {
+ error_details = "Integral constant is too large";
+ Report.Error (1021, Location, error_details);
+ val = 0ul;
+ return Token.LITERAL_INTEGER;
+ }
+ catch (FormatException) {
+ Report.Error (1013, Location, "Invalid number");
+ val = 0ul;
+ return Token.LITERAL_INTEGER;
+ }
+ }
+
+ int adjust_real (int t)
+ {
+ string s = new String (number_builder, 0, number_pos);
+ const string error_details = "Floating-point constant is outside the range of type `{0}'";
+
+ switch (t){
+ case Token.LITERAL_DECIMAL:
+ try {
+ val = System.Decimal.Parse (s, styles, csharp_format_info);
+ } catch (OverflowException) {
+ val = 0m;
+ Report.Error (594, Location, error_details, "decimal");
+ }
+ break;
+ case Token.LITERAL_FLOAT:
+ try {
+ val = (float) System.Double.Parse (s, styles, csharp_format_info);
+ } catch (OverflowException) {
+ val = 0.0f;
+ Report.Error (594, Location, error_details, "float");
+ }
+ break;
+
+ case Token.LITERAL_DOUBLE:
+ case Token.NONE:
+ t = Token.LITERAL_DOUBLE;
+ try {
+ val = System.Double.Parse (s, styles, csharp_format_info);
+ } catch (OverflowException) {
+ val = 0.0;
+ Report.Error (594, Location, error_details, "double");
+ }
+ break;
+ }
+ return t;
+ }
+
+ int handle_hex ()
+ {
+ int d;
+ ulong ul;
+
+ getChar ();
+ while ((d = peekChar ()) != -1){
+ if (is_hex (d)){
+ number_builder [number_pos++] = (char) d;
+ getChar ();
+ } else
+ break;
+ }
+
+ string s = new String (number_builder, 0, number_pos);
+ try {
+ if (number_pos <= 8)
+ ul = System.UInt32.Parse (s, NumberStyles.HexNumber);
+ else
+ ul = System.UInt64.Parse (s, NumberStyles.HexNumber);
+ } catch (OverflowException){
+ error_details = "Integral constant is too large";
+ Report.Error (1021, Location, error_details);
+ val = 0ul;
+ return Token.LITERAL_INTEGER;
+ }
+
+ return integer_type_suffix (ul, peekChar ());
+ }
+
+ //
+ // Invoked if we know we have .digits or digits
+ //
+ int is_number (int c)
+ {
+ bool is_real = false;
+ int type;
+
+ number_pos = 0;
+
+ if (c >= '0' && c <= '9'){
+ if (c == '0'){
+ int peek = peekChar ();
+
+ if (peek == 'x' || peek == 'X')
+ return handle_hex ();
+ }
+ decimal_digits (c);
+ c = getChar ();
+ }
+
+ //
+ // We need to handle the case of
+ // "1.1" vs "1.string" (LITERAL_FLOAT vs NUMBER DOT IDENTIFIER)
+ //
+ if (c == '.'){
+ if (decimal_digits ('.')){
+ is_real = true;
+ c = getChar ();
+ } else {
+ putback ('.');
+ number_pos--;
+ return adjust_int (-1);
+ }
+ }
+
+ if (c == 'e' || c == 'E'){
+ is_real = true;
+ if (number_pos == max_number_size)
+ Error_NumericConstantTooLong ();
+ number_builder [number_pos++] = 'e';
+ c = getChar ();
+
+ if (c == '+'){
+ if (number_pos == max_number_size)
+ Error_NumericConstantTooLong ();
+ number_builder [number_pos++] = '+';
+ c = -1;
+ } else if (c == '-') {
+ if (number_pos == max_number_size)
+ Error_NumericConstantTooLong ();
+ number_builder [number_pos++] = '-';
+ c = -1;
+ } else {
+ if (number_pos == max_number_size)
+ Error_NumericConstantTooLong ();
+ number_builder [number_pos++] = '+';
+ }
+
+ decimal_digits (c);
+ c = getChar ();
+ }
+
+ type = real_type_suffix (c);
+ if (type == Token.NONE && !is_real){
+ putback (c);
+ return adjust_int (c);
+ } else
+ is_real = true;
+
+ if (type == Token.NONE){
+ putback (c);
+ }
+
+ if (is_real)
+ return adjust_real (type);
+
+ Console.WriteLine ("This should not be reached");
+ throw new Exception ("Is Number should never reach this point");
+ }
+
+ //
+ // Accepts exactly count (4 or 8) hex, no more no less
+ //
+ int getHex (int count, out bool error)
+ {
+ int i;
+ int total = 0;
+ int c;
+ int top = count != -1 ? count : 4;
+
+ getChar ();
+ error = false;
+ for (i = 0; i < top; i++){
+ c = getChar ();
+
+ if (c >= '0' && c <= '9')
+ c = (int) c - (int) '0';
+ else if (c >= 'A' && c <= 'F')
+ c = (int) c - (int) 'A' + 10;
+ else if (c >= 'a' && c <= 'f')
+ c = (int) c - (int) 'a' + 10;
+ else {
+ error = true;
+ return 0;
+ }
+
+ total = (total * 16) + c;
+ if (count == -1){
+ int p = peekChar ();
+ if (p == -1)
+ break;
+ if (!is_hex ((char)p))
+ break;
+ }
+ }
+ return total;
+ }
+
+ int escape (int c)
+ {
+ bool error;
+ int d;
+ int v;
+
+ d = peekChar ();
+ if (c != '\\')
+ return c;
+
+ switch (d){
+ case 'a':
+ v = '\a'; break;
+ case 'b':
+ v = '\b'; break;
+ case 'n':
+ v = '\n'; break;
+ case 't':
+ v = '\t'; break;
+ case 'v':
+ v = '\v'; break;
+ case 'r':
+ v = '\r'; break;
+ case '\\':
+ v = '\\'; break;
+ case 'f':
+ v = '\f'; break;
+ case '0':
+ v = 0; break;
+ case '"':
+ v = '"'; break;
+ case '\'':
+ v = '\''; break;
+ case 'x':
+ v = getHex (-1, out error);
+ if (error)
+ goto default;
+ return v;
+ case 'u':
+ v = getHex (4, out error);
+ if (error)
+ goto default;
+ return v;
+ case 'U':
+ v = getHex (8, out error);
+ if (error)
+ goto default;
+ return v;
+ default:
+ Report.Error (1009, Location, "Unrecognized escape sequence `\\{0}'", (char)d);
+ return d;
+ }
+ getChar ();
+ return v;
+ }
+
+ int getChar ()
+ {
+ int x;
+ if (putback_char != -1) {
+ x = putback_char;
+ putback_char = -1;
+ }
+ else
+ x = reader.Read ();
+ if (x == '\n') {
+ line++;
+ ref_line++;
+ previous_col = col;
+ col = 0;
+ }
+ else
+ col++;
+ return x;
+ }
+
+ int peekChar ()
+ {
+ if (putback_char != -1)
+ return putback_char;
+ putback_char = reader.Read ();
+ return putback_char;
+ }
+
+ int peekChar2 ()
+ {
+ if (putback_char != -1)
+ return putback_char;
+ return reader.Peek ();
+ }
+
+ void putback (int c)
+ {
+ if (putback_char != -1){
+ Console.WriteLine ("Col: " + col);
+ Console.WriteLine ("Row: " + line);
+ Console.WriteLine ("Name: " + ref_name.Name);
+ Console.WriteLine ("Current [{0}] putting back [{1}] ", putback_char, c);
+ throw new Exception ("This should not happen putback on putback");
+ }
+ if (c == '\n' || col == 0) {
+ // It won't happen though.
+ line--;
+ ref_line--;
+ col = previous_col;
+ }
+ else
+ col--;
+ putback_char = c;
+ }
+
+ public bool advance ()
+ {
+ return peekChar () != -1;
+ }
+
+ public Object Value {
+ get {
+ return val;
+ }
+ }
+
+ public Object value ()
+ {
+ return val;
+ }
+
+ bool IsCastToken (int token)
+ {
+ switch (token) {
+ case Token.BANG:
+ case Token.TILDE:
+ case Token.IDENTIFIER:
+ case Token.LITERAL_INTEGER:
+ case Token.LITERAL_FLOAT:
+ case Token.LITERAL_DOUBLE:
+ case Token.LITERAL_DECIMAL:
+ case Token.LITERAL_CHARACTER:
+ case Token.LITERAL_STRING:
+ case Token.BASE:
+ case Token.CHECKED:
+ case Token.FALSE:
+ case Token.FIXED:
+ case Token.NEW:
+ case Token.NULL:
+ case Token.SIZEOF:
+ case Token.THIS:
+ case Token.THROW:
+ case Token.TRUE:
+ case Token.TYPEOF:
+ case Token.UNCHECKED:
+ case Token.UNSAFE:
+
+ //
+ // These can be part of a member access
+ //
+ case Token.INT:
+ case Token.UINT:
+ case Token.SHORT:
+ case Token.USHORT:
+ case Token.LONG:
+ case Token.ULONG:
+ case Token.DOUBLE:
+ case Token.FLOAT:
+ case Token.CHAR:
+ return true;
+
+ default:
+ return false;
+ }
+ }
+
+ public int token ()
+ {
+ current_token = xtoken ();
+
+ if (current_token != Token.DEFAULT)
+ return current_token;
+
+ int c = consume_whitespace ();
+ if (c == -1)
+ current_token = Token.ERROR;
+ else if (c == '(')
+ current_token = Token.DEFAULT_OPEN_PARENS;
+ else
+ putback (c);
+
+ return current_token;
+ }
+
+ static StringBuilder static_cmd_arg = new System.Text.StringBuilder ();
+
+ void get_cmd_arg (out string cmd, out string arg)
+ {
+ int c;
+
+ tokens_seen = false;
+ arg = "";
+ static_cmd_arg.Length = 0;
+
+ // 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);
+ c = getChar ();
+ } else {
+ putback (c);
+ break;
+ }
+ }
+
+ cmd = static_cmd_arg.ToString ();
+
+ if (c == '\n'){
+ return;
+ }
+
+ // skip over white space
+ while ((c = getChar ()) != -1 && (c != '\n') && ((c == '\r') || (c == ' ') || (c == '\t')))
+ ;
+
+ if (c == '\n'){
+ return;
+ } else if (c == '\r'){
+ return;
+ } else if (c == -1){
+ arg = "";
+ return;
+ }
+
+ static_cmd_arg.Length = 0;
+ static_cmd_arg.Append ((char) c);
+
+ while ((c = getChar ()) != -1 && (c != '\n') && (c != '\r')){
+ static_cmd_arg.Append ((char) c);
+ }
+
+ arg = static_cmd_arg.ToString ().Trim ();
+ }
+
+ //
+ // Handles the #line directive
+ //
+ bool PreProcessLine (string arg)
+ {
+ if (arg == "")
+ return false;
+
+ if (arg == "default"){
+ ref_line = line;
+ ref_name = file_name;
+ Location.Push (ref_name, line);
+ return true;
+ } else if (arg == "hidden"){
+ //
+ // We ignore #line hidden
+ //
+ return true;
+ }
+
+ try {
+ int pos;
+
+ if ((pos = arg.IndexOf (' ')) != -1 && pos != 0){
+ ref_line = System.Int32.Parse (arg.Substring (0, pos));
+ pos++;
+
+ char [] quotes = { '\"' };
+
+ string name = arg.Substring (pos). Trim (quotes);
+ ref_name = Location.LookupFile (name);
+ file_name.HasLineDirective = true;
+ ref_name.HasLineDirective = true;
+ Location.Push (ref_name, ref_line);
+ } else {
+ ref_line = System.Int32.Parse (arg);
+ }
+ } catch {
+ return false;
+ }
+
+ return true;
+ }
+
+ //
+ // Handles #define and #undef
+ //
+ void PreProcessDefinition (bool is_define, string arg)
+ {
+ if (arg == "" || 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");
+ return;
+ }
+
+ if (!is_identifier_start_character (arg [0]))
+ Report.Error (1001, Location, "Identifier expected: " + arg);
+
+ foreach (char c in arg.Substring (1)){
+ if (!is_identifier_part_character (c)){
+ Report.Error (1001, Location, "Identifier expected: " + arg);
+ return;
+ }
+ }
+
+ if (is_define){
+ if (defines == null)
+ defines = new Hashtable ();
+ define (arg);
+ } else {
+ if (defines == null)
+ return;
+ if (defines.Contains (arg))
+ defines.Remove (arg);
+ }
+ }
+
+ ///
+ /// Handles #pragma directive
+ ///
+ void PreProcessPragma (string arg)
+ {
+ const string warning = "warning";
+ const string w_disable = "warning disable";
+ const string w_restore = "warning restore";
+
+ if (arg == w_disable) {
+ Report.RegisterWarningRegion (Location).WarningDisable (line);
+ return;
+ }
+
+ if (arg == w_restore) {
+ Report.RegisterWarningRegion (Location).WarningEnable (line);
+ return;
+ }
+
+ if (arg.StartsWith (w_disable)) {
+ int[] codes = ParseNumbers (arg.Substring (w_disable.Length));
+ foreach (int code in codes) {
+ if (code != 0)
+ Report.RegisterWarningRegion (Location).WarningDisable (Location, code);
+ }
+ return;
+ }
+
+ if (arg.StartsWith (w_restore)) {
+ int[] codes = ParseNumbers (arg.Substring (w_restore.Length));
+ Hashtable w_table = Report.warning_ignore_table;
+ foreach (int code in codes) {
+ if (w_table != null && w_table.Contains (code))
+ Report.Warning (1635, 1, Location, "Cannot restore warning 'CS{0:0000}' because it was disabled globally", code);
+ Report.RegisterWarningRegion (Location).WarningEnable (Location, code);
+ }
+ return;
+ }
+
+ if (arg.StartsWith (warning)) {
+ Report.Warning (1634, 1, Location, "Expected disable or restore");
+ return;
+ }
+
+ Report.Warning (1633, 1, Location, "Unrecognized #pragma directive");
+ }
+
+ int[] ParseNumbers (string text)
+ {
+ string[] string_array = text.Split (',');
+ int[] values = new int [string_array.Length];
+ int index = 0;
+ foreach (string string_code in string_array) {
+ try {
+ values[index++] = int.Parse (string_code, System.Globalization.CultureInfo.InvariantCulture);
+ }
+ catch (FormatException) {
+ Report.Warning (1692, Location, "Invalid number");
+ }
+ }
+ return values;
+ }
+
+ bool eval_val (string s)
+ {
+ if (s == "true")
+ return true;
+ if (s == "false")
+ return false;
+
+ if (defines == null)
+ return false;
+ if (defines.Contains (s))
+ return true;
+
+ return false;
+ }
+
+ bool pp_primary (ref string s)
+ {
+ s = s.Trim ();
+ int len = s.Length;
+
+ if (len > 0){
+ char c = s [0];
+
+ if (c == '('){
+ s = s.Substring (1);
+ bool val = pp_expr (ref s);
+ if (s.Length > 0 && s [0] == ')'){
+ s = s.Substring (1);
+ return val;
+ }
+ Error_InvalidDirective ();
+ return false;
+ }
+
+ if (is_identifier_start_character (c)){
+ int j = 1;
+
+ while (j < len){
+ c = s [j];
+
+ if (is_identifier_part_character (c)){
+ j++;
+ continue;
+ }
+ bool v = eval_val (s.Substring (0, j));
+ s = s.Substring (j);
+ return v;
+ }
+ bool vv = eval_val (s);
+ s = "";
+ return vv;
+ }
+ }
+ Error_InvalidDirective ();
+ return false;
+ }
+
+ bool pp_unary (ref string s)
+ {
+ s = s.Trim ();
+ int len = s.Length;
+
+ if (len > 0){
+ if (s [0] == '!'){
+ if (len > 1 && s [1] == '='){
+ Error_InvalidDirective ();
+ return false;
+ }
+ s = s.Substring (1);
+ return ! pp_primary (ref s);
+ } else
+ return pp_primary (ref s);
+ } else {
+ Error_InvalidDirective ();
+ return false;
+ }
+ }
+
+ bool pp_eq (ref string s)
+ {
+ bool va = pp_unary (ref s);
+
+ s = s.Trim ();
+ int len = s.Length;
+ if (len > 0){
+ if (s [0] == '='){
+ if (len > 2 && s [1] == '='){
+ s = s.Substring (2);
+ return va == pp_unary (ref s);
+ } else {
+ Error_InvalidDirective ();
+ return false;
+ }
+ } else if (s [0] == '!' && len > 1 && s [1] == '='){
+ s = s.Substring (2);
+
+ return va != pp_unary (ref s);
+
+ }
+ }
+
+ return va;
+
+ }
+
+ bool pp_and (ref string s)
+ {
+ bool va = pp_eq (ref s);
+
+ s = s.Trim ();
+ int len = s.Length;
+ if (len > 0){
+ if (s [0] == '&'){
+ if (len > 2 && s [1] == '&'){
+ s = s.Substring (2);
+ return (va & pp_and (ref s));
+ } else {
+ Error_InvalidDirective ();
+ return false;
+ }
+ }
+ }
+ return va;
+ }
+
+ //
+ // Evaluates an expression for `#if' or `#elif'
+ //
+ bool pp_expr (ref string s)
+ {
+ bool va = pp_and (ref s);
+ s = s.Trim ();
+ int len = s.Length;
+ if (len > 0){
+ char c = s [0];
+
+ if (c == '|'){
+ if (len > 2 && s [1] == '|'){
+ s = s.Substring (2);
+ return va | pp_expr (ref s);
+ } else {
+ Error_InvalidDirective ();
+ return false;
+ }
+ }
+ }
+
+ return va;
+ }
+
+ bool eval (string s)
+ {
+ bool v = pp_expr (ref s);
+ s = s.Trim ();
+ if (s.Length != 0){
+ Error_InvalidDirective ();
+ return false;
+ }
+
+ return v;
+ }
+
+ void Error_InvalidDirective ()
+ {
+ Report.Error (1517, Location, "Invalid preprocessor directive");
+ }
+
+ void Error_UnexpectedDirective (string extra)
+ {
+ Report.Error (
+ 1028, Location,
+ "Unexpected processor directive (" + extra + ")");
+ }
+
+ void Error_TokensSeen ()
+ {
+ Report.Error (1032, Location,
+ "Cannot define or undefine preprocessor symbols after first token in file");
+ }
+
+ //
+ // if true, then the code continues processing the code
+ // if false, the code stays in a loop until another directive is
+ // reached.
+ //
+ bool handle_preprocessing_directive (bool caller_is_taking)
+ {
+ string cmd, arg;
+ bool region_directive = false;
+
+ current_location = new Location (ref_line, Col);
+
+ get_cmd_arg (out cmd, out arg);
+
+ // Eat any trailing whitespaces and single-line comments
+ if (arg.IndexOf ("//") != -1)
+ arg = arg.Substring (0, arg.IndexOf ("//"));
+ arg = arg.TrimEnd (' ', '\t');
+
+ //
+ // 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 == ""){
+ Error_InvalidDirective ();
+ return true;
+ }
+ bool taking = false;
+ if (ifstack == null)
+ ifstack = new Stack ();
+
+ if (ifstack.Count == 0){
+ taking = true;
+ } else {
+ int state = (int) ifstack.Peek ();
+ if ((state & TAKING) != 0)
+ taking = true;
+ }
+
+ if (eval (arg) && taking){
+ int push = TAKING | TAKEN_BEFORE | PARENT_TAKING;
+ if (region_directive)
+ push |= REGION;
+ ifstack.Push (push);
+ return true;
+ } else {
+ int push = (taking ? PARENT_TAKING : 0);
+ if (region_directive)
+ push |= REGION;
+ ifstack.Push (push);
+ 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 ();
+
+ if (region_directive && ((pop & REGION) == 0))
+ Report.Error (1027, Location, "Expected `#endif' directive");
+ else if (!region_directive && ((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 (ifstack.Count == 0)
+ return true;
+ else {
+ int state = (int) ifstack.Peek ();
+
+ if ((state & TAKING) != 0)
+ return true;
+ else
+ return false;
+ }
+ }
+
+ case "elif":
+ if (ifstack == null || ifstack.Count == 0){
+ Error_UnexpectedDirective ("no #if for this #elif");
+ return true;
+ } else {
+ int state = (int) ifstack.Peek ();
+
+ if ((state & REGION) != 0) {
+ Report.Error (1038, Location, "#endregion directive expected");
+ return true;
+ }
+
+ if ((state & ELSE_SEEN) != 0){
+ Error_UnexpectedDirective ("#elif not valid after #else");
+ return true;
+ }
+
+ if ((state & (TAKEN_BEFORE | TAKING)) != 0)
+ return false;
+
+ if (eval (arg) && ((state & PARENT_TAKING) != 0)){
+ state = (int) ifstack.Pop ();
+ ifstack.Push (state | TAKING | TAKEN_BEFORE);
+ return true;
+ } else
+ return false;
+ }
+
+ case "else":
+ if (ifstack == null || ifstack.Count == 0){
+ Report.Error (
+ 1028, Location,
+ "Unexpected processor directive (no #if for this #else)");
+ return true;
+ } else {
+ int state = (int) ifstack.Peek ();
+
+ if ((state & REGION) != 0) {
+ Report.Error (1038, Location, "#endregion directive expected");
+ return true;
+ }
+
+ if ((state & ELSE_SEEN) != 0){
+ Error_UnexpectedDirective ("#else within #else");
+ return true;
+ }
+
+ ifstack.Pop ();
+
+ bool ret;
+ if ((state & TAKEN_BEFORE) == 0){
+ ret = ((state & PARENT_TAKING) != 0);
+ } else
+ ret = false;
+
+ if (ret)
+ state |= TAKING;
+ else
+ state &= ~TAKING;
+
+ ifstack.Push (state | ELSE_SEEN);
+
+ return ret;
+ }
+ }
+
+ //
+ // These are only processed if we are in a `taking' block
+ //
+ if (!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, Location, "#warning: `{0}'", arg);
+ return true;
+ }
+
+ Report.Error (1024, Location, "Wrong preprocessor directive");
+ return true;
+
+ }
+
+ private int consume_string (bool quoted)
+ {
+ int c;
+ string_builder.Length = 0;
+
+ while ((c = getChar ()) != -1){
+ if (c == '"'){
+ if (quoted && peekChar () == '"'){
+ string_builder.Append ((char) c);
+ getChar ();
+ continue;
+ } else {
+ val = string_builder.ToString ();
+ return Token.LITERAL_STRING;
+ }
+ }
+
+ if (c == '\n'){
+ if (!quoted)
+ Report.Error (1010, Location, "Newline in constant");
+ }
+
+ if (!quoted){
+ c = escape (c);
+ if (c == -1)
+ return Token.ERROR;
+ }
+ string_builder.Append ((char) c);
+ }
+
+ Report.Error (1039, Location, "Unterminated string literal");
+ return Token.EOF;
+ }
+
+ private int consume_identifier (int s)
+ {
+ int res = consume_identifier (s, false);
+
+ if (doc_state == XmlCommentState.Allowed)
+ doc_state = XmlCommentState.NotAllowed;
+ switch (res) {
+ case Token.USING:
+ case Token.NAMESPACE:
+ check_incorrect_doc_comment ();
+ break;
+ }
+
+ 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;
+
+ 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
+
+ reader.Position = old;
+ ref_line = old_ref_line;
+ col = old_col;
+ putback_char = old_putback;
+
+ if (ok)
+ return res;
+ else {
+ val = new LocatedToken (Location, "partial");
+ return Token.IDENTIFIER;
+ }
+ }
+
+ return res;
+ }
+
+ private int consume_identifier (int s, bool quoted)
+ {
+ int pos = 1;
+ int c = -1;
+
+ id_builder [0] = (char) s;
+
+ current_location = new Location (ref_line, Col);
+
+ while ((c = getChar ()) != -1) {
+ if (is_identifier_part_character ((char) c)){
+ if (pos == max_id_size){
+ Report.Error (645, Location, "Identifier too long (limit is 512 chars)");
+ return Token.ERROR;
+ }
+
+ id_builder [pos++] = (char) c;
+// putback_char = -1;
+ } else {
+// putback_char = c;
+ putback (c);
+ break;
+ }
+ }
+
+ //
+ // Optimization: avoids doing the keyword lookup
+ // on uppercase letters and _
+ //
+ if (!quoted && (s >= 'a' || s == '_')){
+ int keyword = GetKeyword (id_builder, pos);
+ if (keyword != -1) {
+ val = Location;
+ return keyword;
+ }
+ }
+
+ //
+ // Keep identifiers in an array of hashtables to avoid needless
+ // allocations
+ //
+
+ if (identifiers [pos] != null) {
+ val = identifiers [pos][id_builder];
+ if (val != null) {
+ val = new LocatedToken (Location, (string) val);
+ if (quoted)
+ escapedIdentifiers.Add (val);
+ return Token.IDENTIFIER;
+ }
+ }
+ else
+ identifiers [pos] = new CharArrayHashtable (pos);
+
+ val = new String (id_builder, 0, pos);
+ if (RootContext.Version == LanguageVersion.ISO_1 && id_builder [0] == '_' && id_builder [1] == '_') {
+ Report.Error (1638, Location,
+ "`{0}': Any identifier with double underscores cannot be used when ISO language version mode is specified", val);
+ }
+
+ char [] chars = new char [pos];
+ Array.Copy (id_builder, chars, pos);
+
+ identifiers [pos] [chars] = val;
+
+ val = new LocatedToken (Location, (string) val);
+ if (quoted)
+ escapedIdentifiers.Add (val);
+ return Token.IDENTIFIER;
+ }
+
+ int consume_whitespace ()
+ {
+ int 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') {
+ continue;
+ }
+
+ if (c == ' ' || c == '\f' || c == '\v' || c == 0xa0)
+ continue;
+
+ if (c == '\r') {
+ if (peekChar () == '\n')
+ getChar ();
+
+ any_token_seen |= tokens_seen;
+ tokens_seen = false;
+ comments_seen = false;
+ continue;
+ }
+
+ // Handle double-slash comments.
+ if (c == '/'){
+ int d = peekChar ();
+
+ if (d == '/'){
+ getChar ();
+ if (RootContext.Documentation != null && peekChar () == '/') {
+ getChar ();
+ // Don't allow ////.
+ if ((d = peekChar ()) != '/') {
+ update_comment_location ();
+ if (doc_state == XmlCommentState.Allowed)
+ handle_one_line_xml_comment ();
+ else if (doc_state == XmlCommentState.NotAllowed)
+ warn_incorrect_doc_comment ();
+ }
+ }
+ while ((d = getChar ()) != -1 && (d != '\n') && d != '\r')
+ if (d == '\n'){
+ }
+ any_token_seen |= tokens_seen;
+ tokens_seen = false;
+ comments_seen = false;
+ continue;
+ } else if (d == '*'){
+ getChar ();
+ bool docAppend = false;
+ if (RootContext.Documentation != null && peekChar () == '*') {
+ getChar ();
+ update_comment_location ();
+ // But when it is /**/, just do nothing.
+ if (peekChar () == '/') {
+ getChar ();
+ continue;
+ }
+ if (doc_state == XmlCommentState.Allowed)
+ docAppend = true;
+ else if (doc_state == XmlCommentState.NotAllowed)
+ warn_incorrect_doc_comment ();
+ }
+
+ int current_comment_start = 0;
+ if (docAppend) {
+ current_comment_start = xml_comment_buffer.Length;
+ xml_comment_buffer.Append (Environment.NewLine);
+ }
+
+ Location start_location = Location;
+
+ while ((d = getChar ()) != -1){
+ if (d == '*' && peekChar () == '/'){
+ getChar ();
+ comments_seen = true;
+ break;
+ }
+ if (docAppend)
+ xml_comment_buffer.Append ((char) d);
+
+ if (d == '\n'){
+ any_token_seen |= tokens_seen;
+ tokens_seen = false;
+ //
+ // Reset 'comments_seen' just to be consistent.
+ // It doesn't matter either way, here.
+ //
+ comments_seen = false;
+ }
+ }
+ if (!comments_seen)
+ Report.Error (1035, start_location, "End-of-file found, '*/' expected");
+
+ if (docAppend)
+ update_formatted_doc_comment (current_comment_start);
+ continue;
+ }
+ goto is_punct_label;
+ }
+
+ is_punct_label:
+ // white space
+ if (c == '\n'){
+ any_token_seen |= tokens_seen;
+ tokens_seen = false;
+ comments_seen = false;
+ continue;
+ }
+
+ /* For now, ignore pre-processor commands */
+ // FIXME: In C# the '#' is not limited to appear
+ // on the first column.
+ if (c == '#') {
+ bool cont = true;
+
+ if (tokens_seen || comments_seen) {
+ error_details = "Preprocessor directives must appear as the first non-whitespace " +
+ "character on a line.";
+
+ Report.Error (1040, Location, error_details);
+
+ return Token.ERROR;
+ }
+
+ start_again:
+
+ cont = handle_preprocessing_directive (cont);
+
+ if (cont){
+ continue;
+ }
+
+ 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;
+ }
+ any_token_seen |= tokens_seen;
+ tokens_seen = false;
+ if (c == -1)
+ Report.Error (1027, Location, "Expected `#endif' directive");
+ continue;
+ }
+
+ return c;
+ }
+
+ return -1;
+ }
+
+ public int xtoken ()
+ {
+ int t;
+ bool doread = false;
+ int c;
+
+ val = null;
+ // optimization: eliminate col and implement #directive semantic correctly.
+
+ c = consume_whitespace ();
+ if (c == -1)
+ return Token.EOF;
+
+ if (is_identifier_start_character ((char)c)){
+ tokens_seen = true;
+ return consume_identifier (c);
+ }
+
+ current_location = new Location (ref_line, Col);
+ if ((t = is_punct ((char)c, ref doread)) != Token.ERROR){
+ tokens_seen = true;
+ if (doread){
+ getChar ();
+ col++;
+ }
+ return t;
+ }
+
+ if (c >= '0' && c <= '9'){
+ tokens_seen = true;
+ return is_number (c);
+ }
+
+ if (c == '.'){
+ tokens_seen = true;
+ int peek = peekChar ();
+ if (peek >= '0' && peek <= '9')
+ return is_number (c);
+ return Token.DOT;
+ }
+
+ if (c == '"')
+ return consume_string (false);
+
+ if (c == '\''){
+ c = getChar ();
+ tokens_seen = true;
+ if (c == '\''){
+ error_details = "Empty character literal";
+ Report.Error (1011, Location, error_details);
+ return Token.ERROR;
+ }
+ if (c == '\r' || c == '\n') {
+ Report.Error (1010, Location, "Newline in constant");
+ return Token.ERROR;
+ }
+ c = escape (c);
+ if (c == -1)
+ return Token.ERROR;
+ val = new System.Char ();
+ val = (char) c;
+ c = getChar ();
+
+ if (c != '\''){
+ error_details = "Too many characters in character literal";
+ Report.Error (1012, Location, error_details);
+
+ // Try to recover, read until newline or next "'"
+ while ((c = getChar ()) != -1){
+ if (c == '\n'){
+ break;
+ }
+ else if (c == '\'')
+ break;
+ }
+ return Token.ERROR;
+ }
+ return Token.LITERAL_CHARACTER;
+ }
+
+ if (c == '@') {
+ c = getChar ();
+ if (c == '"') {
+ tokens_seen = true;
+ return consume_string (true);
+ } else if (is_identifier_start_character ((char) c)){
+ return consume_identifier (c, true);
+ } else {
+ Report.Error (1646, Location, "Keyword, identifier, or string expected after verbatim specifier: @");
+ }
+ }
+
+ if (c == '#') {
+ error_details = "Preprocessor directives must appear as the first non-whitespace " +
+ "character on a line.";
+
+ Report.Error (1040, Location, error_details);
+
+ return Token.ERROR;
+ }
+
+ error_details = ((char)c).ToString ();
+
+ return Token.ERROR;
+ }
+
+ //
+ // Handles one line xml comment
+ //
+ private void handle_one_line_xml_comment ()
+ {
+ int c;
+ while ((c = peekChar ()) == ' ')
+ getChar (); // skip heading whitespaces.
+ while ((c = peekChar ()) != -1 && c != '\n' && c != '\r') {
+ xml_comment_buffer.Append ((char) getChar ());
+ }
+ if (c == '\r' || c == '\n')
+ xml_comment_buffer.Append (Environment.NewLine);
+ }
+
+ //
+ // Remove heading "*" in Javadoc-like xml documentation.
+ //
+ private void update_formatted_doc_comment (int current_comment_start)
+ {
+ int length = xml_comment_buffer.Length - current_comment_start;
+ string [] lines = xml_comment_buffer.ToString (
+ current_comment_start,
+ length).Replace ("\r", "").Split ('\n');
+
+ // The first line starts with /**, thus it is not target
+ // for the format check.
+ for (int i = 1; i < lines.Length; i++) {
+ string s = lines [i];
+ int idx = s.IndexOf ('*');
+ string head = null;
+ if (idx < 0) {
+ if (i < lines.Length - 1)
+ return;
+ head = s;
+ } else
+ head = s.Substring (0, idx);
+ foreach (char c in head)
+ if (c != ' ')
+ return;
+ lines [i] = s.Substring (idx + 1);
+ }
+ xml_comment_buffer.Remove (current_comment_start, length);
+ xml_comment_buffer.Insert (current_comment_start, String.Join (Environment.NewLine, lines));
+ }
+
+ //
+ // Updates current comment location.
+ //
+ private void update_comment_location ()
+ {
+ if (current_comment_location.IsNull) {
+ // "-2" is for heading "//" or "/*"
+ current_comment_location =
+ new Location (ref_line, col - 2);
+ }
+ }
+
+ //
+ // Checks if there was incorrect doc comments and raise
+ // warnings.
+ //
+ public void check_incorrect_doc_comment ()
+ {
+ if (xml_comment_buffer.Length > 0)
+ warn_incorrect_doc_comment ();
+ }
+
+ //
+ // Raises a warning when tokenizer found incorrect doccomment
+ // markup.
+ //
+ private void warn_incorrect_doc_comment ()
+ {
+ if (doc_state != XmlCommentState.Error) {
+ doc_state = XmlCommentState.Error;
+ // in csc, it is 'XML comment is not placed on
+ // a valid language element'. But that does not
+ // make sense.
+ Report.Warning (1587, 2, Location, "XML comment is not placed on a valid language element");
+ }
+ }
+
+ //
+ // Consumes the saved xml comment lines (if any)
+ // as for current target member or type.
+ //
+ public string consume_doc_comment ()
+ {
+ if (xml_comment_buffer.Length > 0) {
+ string ret = xml_comment_buffer.ToString ();
+ reset_doc_comment ();
+ return ret;
+ }
+ return null;
+ }
+
+ void reset_doc_comment ()
+ {
+ xml_comment_buffer.Length = 0;
+ current_comment_location = Location.Null;
+ }
+
+ public void cleanup ()
+ {
+ if (ifstack != null && ifstack.Count >= 1) {
+ int state = (int) ifstack.Pop ();
+ if ((state & REGION) != 0)
+ Report.Error (1038, Location, "#endregion directive expected");
+ else
+ Report.Error (1027, Location, "#endif directive expected");
+ }
+
+ }
+ }
+
+ //
+ // Indicates whether it accepts XML documentation or not.
+ //
+ public enum XmlCommentState {
+ // comment is allowed in this state.
+ Allowed,
+ // comment is not allowed in this state.
+ NotAllowed,
+ // once comments appeared when it is NotAllowed, then the
+ // state is changed to it, until the state is changed to
+ // .Allowed.
+ Error
+ }
+}
+