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Details in lparser.c

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Added comments so that all braces pair correctly. (The parser has
several instances of unmatched braces as characters ('{' or '}'), which
hinders matching regular braces in the code.)
This commit is contained in:
Roberto Ierusalimschy 2025-01-10 15:27:17 -03:00
parent 429761d7d2
commit 4b107a8776
1 changed files with 13 additions and 10 deletions
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23
lparser.c
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@ -797,10 +797,11 @@ static void close_func (LexState *ls) {
}
/*============================================================*/
/* GRAMMAR RULES */
/*============================================================*/
/*
** {======================================================================
** GRAMMAR RULES
** =======================================================================
*/
/*
@ -974,15 +975,15 @@ static void constructor (LexState *ls, expdesc *t) {
init_exp(t, VNONRELOC, fs->freereg); /* table will be at stack top */
luaK_reserveregs(fs, 1);
init_exp(&cc.v, VVOID, 0); /* no value (yet) */
checknext(ls, '{');
checknext(ls, '{' /*}*/);
cc.maxtostore = maxtostore(fs);
do {
lua_assert(cc.v.k == VVOID || cc.tostore > 0);
if (ls->t.token == '}') break;
if (ls->t.token == /*{*/ '}') break;
closelistfield(fs, &cc);
field(ls, &cc);
} while (testnext(ls, ',') || testnext(ls, ';'));
check_match(ls, '}', '{', line);
check_match(ls, /*{*/ '}', '{' /*}*/, line);
lastlistfield(fs, &cc);
luaK_settablesize(fs, pc, t->u.info, cc.na, cc.nh);
}
@ -1080,7 +1081,7 @@ static void funcargs (LexState *ls, expdesc *f) {
check_match(ls, ')', '(', line);
break;
}
case '{': { /* funcargs -> constructor */
case '{' /*}*/: { /* funcargs -> constructor */
constructor(ls, &args);
break;
}
@ -1167,7 +1168,7 @@ static void suffixedexp (LexState *ls, expdesc *v) {
funcargs(ls, v);
break;
}
case '(': case TK_STRING: case '{': { /* funcargs */
case '(': case TK_STRING: case '{' /*}*/: { /* funcargs */
luaK_exp2nextreg(fs, v);
funcargs(ls, v);
break;
@ -1215,7 +1216,7 @@ static void simpleexp (LexState *ls, expdesc *v) {
init_exp(v, VVARARG, luaK_codeABC(fs, OP_VARARG, 0, 0, 1));
break;
}
case '{': { /* constructor */
case '{' /*}*/: { /* constructor */
constructor(ls, v);
return;
}
@ -1922,6 +1923,8 @@ static void statement (LexState *ls) {
/* }====================================================================== */
/* }====================================================================== */
/*
** compiles the main function, which is a regular vararg function with an