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static bool add_ident_decls(Block *b, Declaration *d) {
bool ret = true;
arr_foreach(d->idents, Identifier, ident) {
IdentDecl **decls = &(*ident)->decls;
if (arr_len(*decls)) {
/* check that it hasn't been declared in this block */
IdentDecl *prev = arr_last(*decls);
if (prev->scope == b) {
err_print(d->where, "Re-declaration of identifier in the same block.");
info_print(prev->decl->where, "Previous declaration was here.");
ret = false;
continue;
}
}
ident_add_decl(*ident, d, b);
}
return ret;
}
static void remove_ident_decls(Block *b, Declaration *d) {
arr_foreach(d->idents, Identifier, ident) {
IdentTree *id_info = *ident;
IdentDecl **decls = &id_info->decls;
IdentDecl *last_decl = arr_last(*decls);
if (last_decl && last_decl->scope == b) {
if ((last_decl->flags & IDECL_FLAG_HAS_VAL)
&& last_decl->decl->type.kind == TYPE_ARR) {
/* free array on stack */
free(last_decl->val.arr);
}
arr_remove_last(decls); /* remove that declaration */
}
}
}
/* pass NULL for block for global scope */
static bool block_enter(Block *b, Statement *stmts) {
bool ret = true;
arr_foreach(stmts, Statement, stmt) {
if (stmt->kind == STMT_DECL) {
Declaration *decl = &stmt->decl;
if (!add_ident_decls(b, decl))
ret = false;
}
}
return ret;
}
static void block_exit(Block *b, Statement *stmts) {
arr_foreach(stmts, Statement, stmt) {
if (stmt->kind == STMT_DECL) {
Declaration *decl = &stmt->decl;
remove_ident_decls(b, decl);
}
}
}
/* does NOT enter function's block body */
static void fn_enter(FnExpr *f) {
arr_foreach(f->params, Declaration, decl)
add_ident_decls(&f->body, decl);
arr_foreach(f->ret_decls, Declaration, decl)
add_ident_decls(&f->body, decl);
}
static void fn_exit(FnExpr *f) {
arr_foreach(f->params, Declaration, decl)
remove_ident_decls(&f->body, decl);
arr_foreach(f->ret_decls, Declaration, decl)
remove_ident_decls(&f->body, decl);
}
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