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Allow void functions to be called in functions.

This commit is contained in:
Stephen Williams 2013-09-18 19:49:25 -07:00
parent 7bc94d7810
commit 7534abe325
2 changed files with 33 additions and 14 deletions
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2
Statement.h
View File

@ -223,6 +223,8 @@ class PCallTask : public Statement {
NetProc*elaborate_build_call_(Design*des, NetScope*scope,
NetScope*task, NetExpr*use_this) const;
bool test_task_calls_ok_(Design*des, NetScope*scope) const;
PPackage*package_;
pform_name_t path_;
vector<PExpr*> parms_;

45
elaborate.cc
View File

@ -3208,20 +3208,6 @@ NetProc* PCallTask::elaborate_usr(Design*des, NetScope*scope) const
{
assert(scope);
if (scope->in_func()) {
cerr << get_fileline() << ": error: functions cannot enable/call "
"tasks." << endl;
des->errors += 1;
return 0;
}
if (scope->in_final()) {
cerr << get_fileline() << ": error: final procedures cannot "
"enable/call tasks." << endl;
des->errors += 1;
return 0;
}
NetScope*pscope = scope;
if (package_) {
pscope = des->find_package(package_->pscope_name());
@ -3357,6 +3343,31 @@ NetProc* PCallTask::elaborate_method_(Design*des, NetScope*scope) const
return 0;
}
/*
* If during elaboration we determine (for sure) that we are calling a
* task (and not just a void function) then this method tests if that
* task call is allowed in the current context. If so, return true. If
* not, print and error message and return false;
*/
bool PCallTask::test_task_calls_ok_(Design*des, NetScope*scope) const
{
if (scope->in_func()) {
cerr << get_fileline() << ": error: Functions cannot enable/call "
"tasks." << endl;
des->errors += 1;
return false;
}
if (scope->in_final()) {
cerr << get_fileline() << ": error: final procedures cannot "
"enable/call tasks." << endl;
des->errors += 1;
return false;
}
return true;
}
NetProc* PCallTask::elaborate_function_(Design*des, NetScope*scope) const
{
NetFuncDef*func = des->find_function(scope, path_);
@ -3385,6 +3396,12 @@ NetProc* PCallTask::elaborate_build_call_(Design*des, NetScope*scope,
if (task->type() == NetScope::TASK) {
def = task->task_def();
// OK, this is certainly a TASK that I'm calling. Make
// sure that is OK where I am. Even if this test fails,
// continue with the elaboration as if it were OK so
// that we can catch more errors.
test_task_calls_ok_(des, scope);
} else if (task->type() == NetScope::FUNC) {
NetFuncDef*tmp = task->func_def();
if (tmp->return_sig() != 0) {