X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d63282419d27320c40be57d46418a0b44691626c..55f0c7b1f26afabb7f356343f2650626e09fce51:/src/scan-gram.l diff --git a/src/scan-gram.l b/src/scan-gram.l index 60ecdd41..7060ddbd 100644 --- a/src/scan-gram.l +++ b/src/scan-gram.l @@ -1,6 +1,6 @@ /* Bison Grammar Scanner -*- C -*- - Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -16,8 +16,8 @@ You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + 02110-1301 USA */ %option debug nodefault nounput noyywrap never-interactive @@ -34,6 +34,7 @@ #include "files.h" #include "getargs.h" #include "gram.h" +#include "quotearg.h" #include "reader.h" #include "uniqstr.h" @@ -47,6 +48,19 @@ } \ while (0) +/* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */ +int gram_get_lineno (void); +FILE *gram_get_in (void); +FILE *gram_get_out (void); +int gram_get_leng (void); +char *gram_get_text (void); +void gram_set_lineno (int); +void gram_set_in (FILE *); +void gram_set_out (FILE *); +int gram_get_debug (void); +void gram_set_debug (int); +int gram_lex_destroy (void); + /* Location of scanner cursor. */ boundary scanner_cursor; @@ -104,6 +118,7 @@ static void handle_syncline (char *args); static unsigned long int scan_integer (char const *p, int base, location loc); static int convert_ucn_to_byte (char const *hex_text); static void unexpected_eof (boundary, char const *); +static void unexpected_newline (boundary, char const *); %} %x SC_COMMENT SC_LINE_COMMENT SC_YACC_COMMENT @@ -157,10 +172,9 @@ splice (\\[ \f\t\v]*\n)* { - [ \f\n\t\v] ; + /* Comments and white space. */ "," warn_at (*loc, _("stray `,' treated as white space")); - - /* Comments. */ + [ \f\n\t\v] | "//".* ; "/*" { token_start = loc->start; @@ -249,7 +263,7 @@ splice (\\[ \f\t\v]*\n)* "'" STRING_GROW; token_start = loc->start; BEGIN SC_ESCAPED_CHARACTER; /* Strings. */ - "\"" STRING_GROW; token_start = loc->start; BEGIN SC_ESCAPED_STRING; + "\"" token_start = loc->start; BEGIN SC_ESCAPED_STRING; /* Prologue. */ "%{" code_start = loc->start; BEGIN SC_PROLOGUE; @@ -352,15 +366,14 @@ splice (\\[ \f\t\v]*\n)* } - /*----------------------------------------------------------------. - | Scanning a C string, including its escapes. The initial `"' is | - | already eaten. | - `----------------------------------------------------------------*/ + /*------------------------------------------------. + | Scanning a Bison string, including its escapes. | + | The initial quote is already eaten. | + `------------------------------------------------*/ { "\"" { - STRING_GROW; STRING_FINISH; loc->start = token_start; val->chars = last_string; @@ -368,16 +381,14 @@ splice (\\[ \f\t\v]*\n)* BEGIN INITIAL; return STRING; } - - \0 complain_at (*loc, _("invalid null character")); - .|\n STRING_GROW; - <> unexpected_eof (token_start, "\""); BEGIN INITIAL; + \n unexpected_newline (token_start, "\""); BEGIN INITIAL; + <> unexpected_eof (token_start, "\""); BEGIN INITIAL; } - /*---------------------------------------------------------------. - | Scanning a C character, decoding its escapes. The initial "'" | - | is already eaten. | - `---------------------------------------------------------------*/ + /*----------------------------------------------------------. + | Scanning a Bison character literal, decoding its escapes. | + | The initial quote is already eaten. | + `----------------------------------------------------------*/ { @@ -386,7 +397,9 @@ splice (\\[ \f\t\v]*\n)* STRING_GROW; STRING_FINISH; loc->start = token_start; - val->symbol = symbol_get (last_string, *loc); + val->symbol = symbol_get (quotearg_style (escape_quoting_style, + last_string), + *loc); symbol_class_set (val->symbol, token_sym, *loc); last_string_1 = last_string[1]; symbol_user_token_number_set (val->symbol, last_string_1, *loc); @@ -395,10 +408,13 @@ splice (\\[ \f\t\v]*\n)* BEGIN INITIAL; return ID; } + \n unexpected_newline (token_start, "'"); BEGIN INITIAL; + <> unexpected_eof (token_start, "'"); BEGIN INITIAL; +} + +{ \0 complain_at (*loc, _("invalid null character")); - .|\n STRING_GROW; - <> unexpected_eof (token_start, "'"); BEGIN INITIAL; } @@ -412,7 +428,7 @@ splice (\\[ \f\t\v]*\n)* unsigned long int c = strtoul (yytext + 1, 0, 8); if (UCHAR_MAX < c) complain_at (*loc, _("invalid escape sequence: %s"), quote (yytext)); - else if (! c) + else if (! c) complain_at (*loc, _("invalid null character: %s"), quote (yytext)); else obstack_1grow (&obstack_for_string, c); @@ -456,33 +472,27 @@ splice (\\[ \f\t\v]*\n)* } } + /*--------------------------------------------. + | Scanning user-code characters and strings. | + `--------------------------------------------*/ - /*----------------------------------------------------------. - | Scanning a C character without decoding its escapes. The | - | initial "'" is already eaten. | - `----------------------------------------------------------*/ + +{ + {splice}|\\{splice}[^\n$@\[\]] STRING_GROW; +} { - "'" STRING_GROW; BEGIN context_state; - \\{splice}[^$@\[\]] STRING_GROW; - <> unexpected_eof (token_start, "'"); BEGIN context_state; + "'" STRING_GROW; BEGIN context_state; + \n unexpected_newline (token_start, "'"); BEGIN context_state; + <> unexpected_eof (token_start, "'"); BEGIN context_state; } - - /*----------------------------------------------------------------. - | Scanning a C string, without decoding its escapes. The initial | - | `"' is already eaten. | - `----------------------------------------------------------------*/ - { - "\"" STRING_GROW; BEGIN context_state; - \\{splice}[^$@\[\]] STRING_GROW; - <> { - unexpected_eof (token_start, "\""); - BEGIN context_state; - } + "\"" STRING_GROW; BEGIN context_state; + \n unexpected_newline (token_start, "\""); BEGIN context_state; + <> unexpected_eof (token_start, "\""); BEGIN context_state; } @@ -539,7 +549,7 @@ splice (\\[ \f\t\v]*\n)* } else { - complain_at (*loc, _("missing `{' in `%s'"), + complain_at (*loc, _("missing `{' in %s"), token_name (token_type)); obstack_sgrow (&obstack_for_string, "{}"); STRING_FINISH; @@ -641,10 +651,9 @@ splice (\\[ \f\t\v]*\n)* } - /*----------------------------------------------------------------. - | By default, grow the string obstack with the input, escaping M4 | - | quoting characters. | - `----------------------------------------------------------------*/ + /*-----------------------------------------. + | Escape M4 quoting characters in C code. | + `-----------------------------------------*/ { @@ -652,10 +661,16 @@ splice (\\[ \f\t\v]*\n)* \@ obstack_sgrow (&obstack_for_string, "@@"); \[ obstack_sgrow (&obstack_for_string, "@{"); \] obstack_sgrow (&obstack_for_string, "@}"); - .|\n STRING_GROW; } + /*-----------------------------------------------------. + | By default, grow the string obstack with the input. | + `-----------------------------------------------------*/ + +. | +\n STRING_GROW; + %% /* Keeps track of the maximum number of semantic values to the left of @@ -805,7 +820,7 @@ handle_action_dollar (char *text, location loc) if (!type_name) type_name = ""; obstack_fgrow3 (&obstack_for_string, - "]b4_rhs_value([%d], [%d], [%s])[", + "]b4_rhs_value(%d, %d, [%s])[", rule_length, n, type_name); } else @@ -874,7 +889,7 @@ handle_action_at (char *text, location loc) if (INT_MIN <= num && num <= rule_length && ! get_errno ()) { int n = num; - obstack_fgrow2 (&obstack_for_string, "]b4_rhs_location([%d], [%d])[", + obstack_fgrow2 (&obstack_for_string, "]b4_rhs_location(%d, %d)[", rule_length, n); } else @@ -1003,12 +1018,28 @@ handle_syncline (char *args) const char *file = NULL; file = strchr (args, '"') + 1; *strchr (file, '"') = 0; - scanner_cursor.file = current_file = xstrdup (file); + scanner_cursor.file = current_file = uniqstr_new (file); scanner_cursor.line = lineno; scanner_cursor.column = 1; } +/*----------------------------------------------------------------. +| For a token or comment starting at START, report message MSGID, | +| which should say that an end marker was found before | +| the expected TOKEN_END. | +`----------------------------------------------------------------*/ + +static void +unexpected_end (boundary start, char const *msgid, char const *token_end) +{ + location loc; + loc.start = start; + loc.end = scanner_cursor; + complain_at (loc, _(msgid), token_end); +} + + /*------------------------------------------------------------------------. | Report an unexpected EOF in a token or comment starting at START. | | An end of file was encountered and the expected TOKEN_END was missing. | @@ -1017,10 +1048,18 @@ handle_syncline (char *args) static void unexpected_eof (boundary start, char const *token_end) { - location loc; - loc.start = start; - loc.end = scanner_cursor; - complain_at (loc, _("missing `%s' at end of file"), token_end); + unexpected_end (start, N_("missing `%s' at end of file"), token_end); +} + + +/*----------------------------------------. +| Likewise, but for unexpected newlines. | +`----------------------------------------*/ + +static void +unexpected_newline (boundary start, char const *token_end) +{ + unexpected_end (start, N_("missing `%s' at end of line"), token_end); }