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%{
#include "ast.h"
#include "lexer.h"
#include <stdio.h>
#include <string.h>
struct Node* program_root = NULL;
void yyerror(const char* message);
%}
%union
{
char character;
struct Name name;
struct Node* node;
}
%token TOK_COLONCOLON
%token TOK_EMIT
%token TOK_STATIC_ASSERT
%token TOK_COMMIT
%token TOK_DECLARE
%token TOK_NAME
%token TOK_VALUE_OF
%token TOK_VOID
%token TOK_INT32
%token TOK_BYTE
%token TOK_SIZE_T
%token TOK_REMOVE_CV
%token TOK_DECLTYPE
%token TOK_DIFFERENCE
%token TOK_SUM
%token TOK_PRODUCT
%token TOK_QUOTIENT
%token TOK_ARRAY
%token TOK_EXTENT
%token TOK_TUPLE_SIZE
%token TOK_INTEGRAL_CONSTANT
%token TOK_VALUE
%token TOK_CONDITIONAL_T
%token TOK_CONDITIONAL
%token TOK_TRUE_TYPE
%token TOK_FALSE_TYPE
%token TOK_IS_SAME
%token TOK_EQUAL
%token TOK_LESS
%token <character> TOK_CHAR
%type <name> name char_list
%type <node> statements statement type value condition
%%
program
: statements
{ program_root = $1; }
;
statements
: /* nothing */
{ $$ = NULL; }
| statements statement ';'
{ $$ = node_append($1, $2); }
;
statement
: TOK_COLONCOLON TOK_EMIT '<' type '>' TOK_COLONCOLON TOK_COMMIT
{ $$ = node_unary(STMT_EMIT, $4); }
| TOK_COLONCOLON TOK_STATIC_ASSERT '<' condition '>' TOK_COLONCOLON TOK_COMMIT
{ $$ = node_unary(STMT_STATIC_ASSERT, $4); }
| TOK_COLONCOLON TOK_DECLARE '<' name ',' type '>' TOK_COLONCOLON TOK_COMMIT
{ $$ = node_named(STMT_DECLARE, &$4, $6); }
;
name
: TOK_COLONCOLON TOK_NAME '<' char_list '>'
{ $$ = $4; }
;
char_list
: TOK_CHAR
{
name_init(&$$);
(void)name_push(&$$, $1);
}
| char_list ',' TOK_CHAR
{
$$ = $1;
if (!name_push(&$$, $3))
{
yyerror("that name is too long, who are you");
YYERROR;
}
}
;
type
: TOK_COLONCOLON TOK_VOID
{ $$ = node_leaf(TYPE_VOID); }
| TOK_COLONCOLON TOK_INT32
{ $$ = node_leaf(TYPE_INT32); }
| TOK_COLONCOLON TOK_BYTE
{ $$ = node_leaf(TYPE_BYTE); }
| TOK_COLONCOLON TOK_SIZE_T
{ $$ = node_leaf(TYPE_SIZE); }
| TOK_COLONCOLON TOK_REMOVE_CV '<' type '>'
{ $$ = node_unary(TYPE_REMOVE_CV, $4); }
| TOK_COLONCOLON TOK_ARRAY '<' type ',' value '>'
{ $$ = node_binary(TYPE_ARRAY, $4, $6); }
| TOK_COLONCOLON TOK_CONDITIONAL_T '<' condition ',' type ',' type '>'
{ $$ = node_ternary(TYPE_CONDITIONAL, $4, $6, $8); }
| TOK_COLONCOLON TOK_DECLTYPE '(' value ')'
{ $$ = node_unary(TYPE_DECLTYPE, $4); }
;
value
: TOK_COLONCOLON TOK_DIFFERENCE '<' TOK_CHAR ',' TOK_CHAR '>'
{ $$ = node_binary(VALUE_DIFFERENCE, node_char($4), node_char($6)); }
| TOK_COLONCOLON TOK_SUM '<' value ',' value '>'
{ $$ = node_binary(VALUE_SUM, $4, $6); }
| TOK_COLONCOLON TOK_PRODUCT '<' value ',' value '>'
{ $$ = node_binary(VALUE_PRODUCT, $4, $6); }
| TOK_COLONCOLON TOK_QUOTIENT '<' value ',' value '>'
{ $$ = node_binary(VALUE_QUOTIENT, $4, $6); }
| TOK_COLONCOLON TOK_VALUE_OF '<' name '>'
{ $$ = node_named(VALUE_VARIABLE, &$4, NULL); }
| TOK_COLONCOLON TOK_EXTENT '<' type '>' TOK_COLONCOLON TOK_VALUE
{ $$ = node_unary(VALUE_EXTENT, $4); }
| TOK_COLONCOLON TOK_TUPLE_SIZE '<' type '>' TOK_COLONCOLON TOK_VALUE
{ $$ = node_unary(VALUE_TUPLE_SIZE, $4); }
| TOK_COLONCOLON TOK_INTEGRAL_CONSTANT '<' TOK_COLONCOLON TOK_SIZE_T ',' value '>'
TOK_COLONCOLON TOK_VALUE
{ $$ = node_unary(VALUE_INTEGRAL_CONSTANT, $7); }
| TOK_COLONCOLON TOK_CONDITIONAL '<' condition ',' value ',' value '>'
{ $$ = node_ternary(VALUE_CONDITIONAL, $4, $6, $8); }
;
condition
: TOK_COLONCOLON TOK_TRUE_TYPE TOK_COLONCOLON TOK_VALUE
{ $$ = node_leaf(COND_TRUE); }
| TOK_COLONCOLON TOK_FALSE_TYPE TOK_COLONCOLON TOK_VALUE
{ $$ = node_leaf(COND_FALSE); }
| TOK_COLONCOLON TOK_IS_SAME '<' type ',' type '>' TOK_COLONCOLON TOK_VALUE
{ $$ = node_binary(COND_IS_SAME, $4, $6); }
| TOK_COLONCOLON TOK_EQUAL '<' value ',' value '>' TOK_COLONCOLON TOK_VALUE
{ $$ = node_binary(COND_EQUAL, $4, $6); }
| TOK_COLONCOLON TOK_LESS '<' value ',' value '>' TOK_COLONCOLON TOK_VALUE
{ $$ = node_binary(COND_LESS, $4, $6); }
;
%%
void yyerror(const char* message)
{
if (!lexer_failed())
{
(void)fprintf(stderr, "line %d: %s%s\n", yylineno, message,
strcmp(message, "syntax error") == 0 ? ", did you forget to commit" : "");
}
}
|
