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/*
Copyright (C) 2019, 2020 Leo Tenenbaum.
This file is part of toc. toc is distributed under version 3 of the GNU General Public License, without any warranty whatsoever.
You should have received a copy of the GNU General Public License along with toc. If not, see <https://www.gnu.org/licenses/>.
*/
static bool typedefs_stmt(CGenerator *g, Statement *s);
static bool typedefs_decl(CGenerator *g, Declaration *d);
static bool typedefs_expr(CGenerator *g, Expression *e);
#define cgen_recurse_into_type(f, g, type, extra) \
switch (type->kind) { \
case TYPE_STRUCT: \
arr_foreach(type->struc->fields, Field, fl) \
if (!f(g, fl->type, extra)) \
return false; \
break; \
case TYPE_FN: \
arr_foreach(type->fn.types, Type, sub) { \
if (!f(g, sub, extra)) \
return false; \
} \
break; \
case TYPE_TUPLE: \
arr_foreach(type->tuple, Type, sub) \
if (!f(g, sub, extra)) \
return false; \
break; \
case TYPE_ARR: \
if (!f(g, type->arr.of, extra)) \
return false; \
break; \
case TYPE_SLICE: \
if (!f(g, type->slice, extra)) \
return false; \
break; \
case TYPE_PTR: \
if (!f(g, type->ptr, extra)) \
return false; \
break; \
case TYPE_VOID: \
case TYPE_BUILTIN: \
case TYPE_PKG: \
case TYPE_TYPE: \
case TYPE_UNKNOWN: \
break; \
case TYPE_EXPR: assert(0); \
}
/* i is the name for this type, NULL if not available */
/* ALWAYS RETURNS TRUE. it just returns a bool for cgen_recurse_into_type to work */
static bool typedefs_type(CGenerator *g, Type *type, Identifier i) {
if (!(type->flags & TYPE_IS_RESOLVED)) /* non-instance constant fn parameter type */
return true;
if (type->kind == TYPE_STRUCT) {
StructDef *sdef = type->struc;
/* we'll actually define the struct later; here we can just declare it */
if (sdef->c.id || sdef->c.name) {
/* we've already done this */
} else {
cgen_write(g, "struct ");
if (i) {
cgen_ident(g, i);
sdef->c.name = i;
} else {
IdentID id = ++g->ident_counter;
cgen_ident_id(g, id);
sdef->c.id = id;
}
cgen_write(g, ";");
cgen_nl(g);
}
}
cgen_recurse_into_type(typedefs_type, g, type, NULL);
return true;
}
static bool typedefs_block(CGenerator *g, Block *b) {
Block *prev = g->block;
if (!cgen_block_enter(g, b))
return false;
arr_foreach(b->stmts, Statement, s)
if (!typedefs_stmt(g, s))
return false;
if (b->ret_expr && !typedefs_expr(g, b->ret_expr))
return false;
cgen_block_exit(g, prev);
return true;
}
static bool typedefs_expr(CGenerator *g, Expression *e) {
cgen_recurse_subexprs(g, e, typedefs_expr, typedefs_block, typedefs_decl);
if (e->kind == EXPR_CAST) {
typedefs_type(g, &e->cast.type, NULL);
}
if (e->kind == EXPR_FN) {
/* needs to go before decls_cgen.c... */
e->fn->c.id = ++g->ident_counter;
}
if (e->kind == EXPR_TYPE && e->typeval.kind == TYPE_STRUCT) {
StructDef *sdef = e->typeval.struc;
if (sdef->c.id || sdef->c.name) {
/* we've already done this */
} else {
cgen_write(g, "struct ");
IdentID id = ++g->ident_counter;
cgen_ident_id(g, id);
sdef->c.id = id;
cgen_write(g, ";");
}
}
return true;
}
static bool typedefs_decl(CGenerator *g, Declaration *d) {
typedefs_type(g, &d->type, NULL);
if (cgen_fn_is_direct(g, d)) {
d->expr.fn->c.name = d->idents[0];
}
for (int idx = 0; idx < (int)arr_len(d->idents); ++idx) {
Identifier i = d->idents[idx];
Type *type = decl_type_at_index(d, idx);
Value *val = decl_val_at_index(d, idx);
if (type->kind == TYPE_TYPE) {
/* generate typedef */
typedefs_type(g, val->type, i);
if (val->type->kind != TYPE_STRUCT) {
IdentID id = 0;
if (g->block != NULL || g->fn != NULL)
id = ++g->ident_counter;
if (val->type->kind != TYPE_TYPE) {
cgen_write(g, "typedef ");
if (!cgen_type_pre(g, val->type, d->where)) return false;
cgen_write(g, " ");
if (id) {
cgen_ident_id(g, id);
} else {
cgen_ident(g, i);
}
if (val->type->kind != TYPE_STRUCT) {
if (!cgen_type_post(g, val->type, d->where)) return false;
}
cgen_write(g, ";");
}
}
cgen_nl(g);
}
}
if (d->flags & DECL_HAS_EXPR) {
if (!typedefs_expr(g, &d->expr))
return false;
}
return true;
}
static bool typedefs_stmt(CGenerator *g, Statement *s) {
switch (s->kind) {
case STMT_DECL:
if (!typedefs_decl(g, &s->decl))
return false;
break;
case STMT_EXPR:
if (!typedefs_expr(g, &s->expr))
return false;
break;
case STMT_RET:
if (s->ret.flags & RET_HAS_EXPR)
if (!typedefs_expr(g, &s->ret.expr))
return false;
break;
}
return true;
}
static bool typedefs_file(CGenerator *g, ParsedFile *f) {
arr_foreach(f->stmts, Statement, s) {
if (!typedefs_stmt(g, s))
return false;
}
return true;
}
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