/// <summary>
/// Called when a <see cref="WhileBlock"/> block is read.
/// Verifies the structure of the While loop and calls the corresponding functions that
/// handle the code generation for the loop.
/// Called by <see cref="INSTRUCTION"/>.
/// </summary>
void WHILE()
{
Expect(30); // "while"
QuadrupleManager.WhileBeforeCondition();
Expect(10); // '('
SUPER_EXP();
Expect(12); // ')'
QuadrupleManager.WhileAfterCondition();
Expect(7); // '{'
while (StartOf(1))
{
INSTRUCTION();
}
Expect(8); // '}'
QuadrupleManager.WhileEnd();
}