int translation_unit(void) {
if( external_declaration() ) {
} else if( translation_unit() ) {
external_declaration();
} else {
abort();
}
}
static struct symbol_list *sparse_tokenstream(struct token *token)
{
// Preprocess the stream
token = preprocess(token);
if (preprocess_only) {
while (!eof_token(token)) {
int prec = 1;
struct token *next = token->next;
const char *separator = "";
if (next->pos.whitespace)
separator = " ";
if (next->pos.newline) {
separator = "\n\t\t\t\t\t";
prec = next->pos.pos;
if (prec > 4)
prec = 4;
}
printf("%s%.*s", show_token(token), prec, separator);
token = next;
}
putchar('\n');
return NULL;
}
// Parse the resulting C code
while (!eof_token(token))
token = external_declaration(token, &translation_unit_used_list);
return translation_unit_used_list;
}
/**
复合语句
<compound_statement>::=<TK_BEGIN>{<declaration>}{<statement>}<TK_END>
*/
void compound_statement(){
syntax_state = SNTX_LF_HT;
syntax_level++; ///复合语句，缩�
get_token();
while(is_type_specifier(token)){
external_declaration(SC_LOCAL);
get_token();
}
while(TK_END != token)
statement();
syntax_state = SNTX_LF_HT;
get_token();
}
TOKEN translation_unit(void)
{
TOKEN trans_unit = NULL;
TOKEN next = NULL;
TOKEN tok = peek_token();
if(tok != NULL)
{
trans_unit = external_declaration();
next = translation_unit();
if(trans_unit != NULL)
{
set_token_link(trans_unit, next);
}
else
{
trans_unit = next;
}
}
return trans_unit;
}
/**
@brief 翻译单元
*/
void translation_unit(){
while(token != TK_EOF){
external_declaration(SC_GLOBAL);
}
}
/**
翻译单元
<translation_unit>::={<external_declaration>}<TK_EOF>
*/
void translation_unit(){
while(token != TK_EOF)
external_declaration(SC_GLOBAL); /// 函数外部解析状态
}