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Add help function to check loop variable

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This commit is contained in:
AmazingPP 2022-07-19 09:08:42 +08:00
parent 3312e19d5b
commit f5f489ba10
1 changed files with 14 additions and 34 deletions
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48
src/parse.y
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@ -247,6 +247,15 @@ static bool expr_is_table_type_name(const Expr* expr)
return false;
}
static void check_loop_var(ID* var)
{
if ( var->IsGlobal() )
var->Error("global variable used in for loop");
if ( var->IsConst() )
var->Error("constant used in for loop");
}
static void build_global(ID* id, Type* t, InitClass ic, Expr* e,
std::vector<AttrPtr>* attrs, DeclType dt)
{
@ -1908,14 +1917,7 @@ for_head:
auto loop_var = lookup_ID($3, current_module.c_str());
if ( loop_var )
{
if ( loop_var->IsGlobal() )
loop_var->Error("global variable used in for loop");
if ( loop_var->IsConst() )
loop_var->Error("constant used in for loop");
}
check_loop_var(loop_var.get());
else
{
loop_var = install_ID($3, current_module.c_str(),
@ -1945,24 +1947,12 @@ for_head:
// Validate previous definitions as needed.
if ( key_var )
{
if ( key_var->IsGlobal() )
key_var->Error("global variable used in for loop");
if ( key_var->IsConst() )
key_var->Error("constant used in for loop");
}
check_loop_var(key_var.get());
else
key_var = install_ID($3, module, false, false);
if ( val_var )
{
if ( val_var->IsGlobal() )
val_var->Error("global variable used in for loop");
if ( val_var->IsConst() )
val_var->Error("constant used in for loop");
}
check_loop_var(val_var.get());
else
val_var = install_ID($5, module, false, false);
@ -1981,13 +1971,7 @@ for_head:
auto val_var = lookup_ID($7, module);
if ( val_var )
{
if ( val_var->IsGlobal() )
val_var->Error("global variable used in for loop");
if ( val_var->IsConst() )
val_var->Error("constant used in for loop");
}
check_loop_var(val_var.get());
else
val_var = install_ID($7, module, false, false);
@ -2014,11 +1998,7 @@ local_id:
if ( $$ )
{
if ( $$->IsGlobal() )
$$->Error("already a global identifier");
if ( $$->IsConst() )
$$->Error("already a const identifier");
check_loop_var($$);
delete [] $1;
}