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| /**
# Lexer for Basilisk C
Closely based on the [C99 lexer](c.lex). */
%option bison-bridge noyywrap yylineno nounput
%e 1019
%p 2807
%n 371
%k 284
%a 1213
%o 1117
O [0-7]
D [0-9]
NZ [1-9]
L [a-zA-Z_]
A [a-zA-Z_0-9]
H [a-fA-F0-9]
HP (0[xX])
E ([Ee][+-]?{D}+)
P ([Pp][+-]?{D}+)
FS (f|F|l|L)
IS (((u|U)(l|L|ll|LL)?)|((l|L|ll|LL)(u|U)?))
CP (u|U|L)
SP (u8|u|U|L)
ES (\\(['"\?\\abfnrtv]|[0-7]{1,3}|x[a-fA-F0-9]+))
WS [ \t\v\n\f]
STRING \"([^"\\\n]|{ES})*\"
%{
#include <stdio.h>
#include <assert.h>
#include "parser.h"
#include "basilisk.h"
#define YYSTYPE Ast *
#define YY_DECL int yylex (YYSTYPE * yylval_param, AstRoot * parse)
static void comment (void);
static void preproc (void);
static void bpreproc (void);
static void ompreproc (void);
static void file_line (AstRoot * parse, const char * text);
static int check_type (AstRoot * parse);
static Ast * new_ast (AstRoot * parse,
int token, int line, char * start, char * end)
{
Allocator * alloc = parse->alloc;
Ast * n = allocate (alloc, sizeof(AstTerminal));
memset (n, 0, sizeof(AstTerminal));
n->sym = token_symbol (token);
AstTerminal * t = ast_terminal (n);
t->start = start;
t->after = end;
t->file = parse->file;
while (start != end) {
if (*start == '\n')
line--;
start++;
}
t->line = line;
return n;
}
#define CAST() \
*yylval = new_ast (parse, yytext[0], yylineno, yytext, yytext); \
return yytext[0];
#define SAST(t) \
*yylval = new_ast (parse, t, yylineno, yytext, yytext + strlen(yytext) - 1); \
return t;
%}
%%
"/*" { comment(); }
"//".* { /* consume //-comment */ }
^[ \t]*#[ \t]+[0-9]+[ \t]+{STRING}.* { file_line (parse, yytext); }
^[ \t]*# { preproc(); }
^[ \t]*@[ \t]*def[ \t].* { bpreproc(); }
^[ \t]*@.*
^[ \t]*OMP[ \t]*\( { ompreproc(); }
"auto" { SAST(AUTO); }
"break" { SAST(BREAK); }
"case" { SAST(CASE); }
"char" { SAST(CHAR); }
"const" { SAST(CONST); }
"continue" { SAST(CONTINUE); }
"default" { SAST(DEFAULT); }
"do" { SAST(DO); }
"double" { SAST(DOUBLE); }
"else" { SAST(ELSE); }
"enum" { SAST(ENUM); }
"extern" { SAST(EXTERN); }
"float" { SAST(FLOAT); }
"for" { SAST(FOR); }
"goto" { SAST(GOTO); }
"if" { SAST(IF); }
"inline" { SAST(INLINE); }
"int" { SAST(INT); }
"long" { SAST(LONG); }
"register" { SAST(REGISTER); }
"restrict" { SAST(RESTRICT); }
"return" { SAST(RETURN); }
"short" { SAST(SHORT); }
"signed" { SAST(SIGNED); }
"sizeof" { SAST(SIZEOF); }
"static" { SAST(STATIC); }
"struct" { SAST(STRUCT); }
"switch" { SAST(SWITCH); }
"typedef" { SAST(TYPEDEF); }
"union" { SAST(UNION); }
"unsigned" { SAST(UNSIGNED); }
"void" { SAST(VOID); }
"volatile" { SAST(VOLATILE); }
"while" { SAST(WHILE); }
"_Alignas" { SAST(ALIGNAS); }
"_Alignof" { SAST(ALIGNOF); }
"_Atomic" { SAST(ATOMIC); }
"_Bool" { SAST(BOOL); }
"_Complex" { SAST(COMPLEX); }
"complex" { SAST(COMPLEX); }
"_Generic" { SAST(GENERIC); }
"_Imaginary" { SAST(IMAGINARY); }
"_Noreturn" { SAST(NORETURN); }
"_Static_assert" { SAST(STATIC_ASSERT); }
"_Thread_local" { SAST(THREAD_LOCAL); }
"__func__" { SAST(FUNC_NAME); }
/* Basilisk C tokens */
"new"{WS}+("vertex"{WS}+)?"scalar" { SAST(NEW_FIELD); }
"new"{WS}+("face"{WS}+)?"vector" { SAST(NEW_FIELD); }
"new"{WS}+("symmetric"{WS}+)?"tensor" { SAST(NEW_FIELD); }
"vertex"{WS}+"scalar" { SAST(TYPEDEF_NAME); }
"face"{WS}+"vector" { SAST(TYPEDEF_NAME); }
"symmetric"{WS}+"tensor" { SAST(TYPEDEF_NAME); }
"(const)" { SAST(MAYBECONST); }
"trace" { SAST(TRACE); }
"reduction" { SAST(REDUCTION); }
"foreach_blockf" |
"foreach_block" |
"foreach_child" |
"foreach_neighbor" { SAST(FOREACH_INNER); }
"foreach_dimension" { SAST(FOREACH_DIMENSION); }
"foreach" |
"foreach_"{L}{A}* { SAST(FOREACH); }
/* GCC extensions */
"__attribute__"{WS}*\( { ompreproc(); }
/* End of GCC extensions */
{L}{A}* { SAST(check_type (parse)); }
{HP}{H}+{IS}? { SAST(I_CONSTANT); }
{NZ}{D}*{IS}? { SAST(I_CONSTANT); }
"0"{O}*{IS}? { SAST(I_CONSTANT); }
{CP}?"'"([^'\\\n]|{ES})+"'" { SAST(I_CONSTANT); }
{D}+{E}{FS}? { SAST(F_CONSTANT); }
{D}*"."{D}+{E}?{FS}? { SAST(F_CONSTANT); }
{D}+"."{E}?{FS}? { SAST(F_CONSTANT); }
{HP}{H}+{P}{FS}? { SAST(F_CONSTANT); }
{HP}{H}*"."{H}+{P}{FS}? { SAST(F_CONSTANT); }
{HP}{H}+"."{P}{FS}? { SAST(F_CONSTANT); }
({SP}?\"([^"\\\n]|{ES})*\"{WS}*)+ { SAST(STRING_LITERAL); }
"..." { SAST(ELLIPSIS); }
">>=" { SAST(RIGHT_ASSIGN); }
"<<=" { SAST(LEFT_ASSIGN); }
"+=" { SAST(ADD_ASSIGN); }
"-=" { SAST(SUB_ASSIGN); }
"*=" { SAST(MUL_ASSIGN); }
"/=" { SAST(DIV_ASSIGN); }
"%=" { SAST(MOD_ASSIGN); }
"&=" { SAST(AND_ASSIGN); }
"^=" { SAST(XOR_ASSIGN); }
"|=" { SAST(OR_ASSIGN); }
">>" { SAST(RIGHT_OP); }
"<<" { SAST(LEFT_OP); }
"++" { SAST(INC_OP); }
"--" { SAST(DEC_OP); }
"->" { SAST(PTR_OP); }
"&&" { SAST(AND_OP); }
"||" { SAST(OR_OP); }
"<=" { SAST(LE_OP); }
">=" { SAST(GE_OP); }
"==" { SAST(EQ_OP); }
"!=" { SAST(NE_OP); }
";" { CAST(); }
("{"|"<%") { CAST(); }
("}"|"%>") { CAST(); }
"," { CAST(); }
":" { CAST(); }
"=" { CAST(); }
"(" { CAST(); }
")" { CAST(); }
("["|"<:") { CAST(); }
("]"|":>") { CAST(); }
"." { CAST(); }
"&" { CAST(); }
"!" { CAST(); }
"~" { CAST(); }
"-" { CAST(); }
"+" { CAST(); }
"*" { CAST(); }
"/" { CAST(); }
"%" { CAST(); }
"<" { CAST(); }
">" { CAST(); }
"^" { CAST(); }
"|" { CAST(); }
"?" { CAST(); }
{WS} { /* whitespace separates tokens */ }
. { /* discard bad characters */ }
%%
static void comment (void)
{
int c;
while ((c = input()) != 0)
if (c == '*') {
while ((c = input()) == '*')
;
if (c == '/')
return;
if (c == 0)
break;
}
// yyerror ("unterminated comment");
}
static void preproc (void)
{
int c, c1 = 0;
while ((c = input()) != 0) {
if (c == '\n' && c1 != '\\')
return;
c1 = c;
}
// yyerror ("unterminated preprocessor directive");
}
static void bpreproc (void)
{
int c;
while ((c = input()) != 0)
if (c == '@')
return;
// yyerror ("unterminated @def");
}
static void ompreproc (void)
{
int c, scope = 1;
while ((c = input()) != 0) {
if (c == '(')
scope++;
else if (c == ')') {
scope--;
if (scope == 0)
return;
}
}
// yyerror ("unterminated OMP");
}
static void file_line (AstRoot * parse, const char * text)
{
char * s = strchr (text, '#') + 1;
yylineno = atoi(s) - 1;
s = strchr (s, '"') + 1;
char * end = strchr (s, '"');
parse->file = allocate (parse->alloc, end - s + 1);
strncpy ((char *) parse->file, s, end - s);
// fprintf (stderr, "%s: \"%s\" %d\n", text, file, yylineno);
}
static int check_type (AstRoot * parse)
{
if (parse->type_already_specified)
return IDENTIFIER;
Ast * declaration = ast_identifier_declaration (parse->stack, yytext);
if (declaration) {
if (ast_is_typedef (declaration))
return TYPEDEF_NAME;
return IDENTIFIER;
}
return IDENTIFIER;
}
void lexer_setup (char * buffer, size_t len)
{
yylineno = 1;
yy_scan_buffer (buffer, len);
}
|
