def test_while(self):
cpl_program = """
a, b: float;
{
while (a < b) {
if (b > 100)
break;
else {
a = a + 1;
continue;
}
}
}
"""
ast = build_ast(CPLTokenizer(cpl_program))
sym = SymbolTable.build_form_ast(ast)
code = [i.code for i in get_ir(ast, sym)]
self.assertEqual(code, [
'condition_label_2:', 'RLSS t1 a b', 'JMPZ end_while_label_3 t1',
'ITOR t3 100', 'RGRT t2 b t3', 'JMPZ else_label_0 t2',
'JUMP end_while_label_3', 'JUMP endif_label_1', 'else_label_0:',
'ITOR t5 1', 'RADD t4 a t5', 'RASN a t4', 'JUMP condition_label_2',
'endif_label_1:', 'JUMP condition_label_2', 'end_while_label_3:',
'HALT'
])
def compiler(cpl_string):
"""
The function simulates a CPL compiler.
:param cpl_string: String which represent the CPL program.
:return pair of two lists (errors, quad).
"""
quad = []
errors, ast = build_ast(CPLTokenizer(cpl_string))
if errors and not ast:
return errors, []
try:
_errors, symbol_table = SymbolTable.build_form_ast(ast)
errors.extend(_errors)
quad = get_quad(get_ir(ast, symbol_table))
except CPLCompoundException as exception:
errors.extend(exception.exceptions)
return errors, quad
def test_switch(self):
cpl_program = """
a, b: int;
{
switch(a) {
case 1: {
write(1);
break;
}
case 2: write(2);
case 3: {
switch(b) {
case 5: write(5);
default: break;
}
}
case 4: write(4);
default: write(0);
}
}
"""
ast = build_ast(CPLTokenizer(cpl_program))
sym = SymbolTable.build_form_ast(ast)
code = [i.code for i in get_ir(ast, sym)]
self.assertEqual(code, [
'case_1_label_3:', 'IEQL t2 a 1', 'JMPZ case_2_label_4 t2',
'IPRT 1', 'JUMP end_switch_label_7', 'JUMP end_switch_label_7',
'case_2_label_4:', 'IEQL t3 a 2', 'JMPZ case_3_label_5 t3',
'IPRT 2', 'JUMP end_switch_label_7', 'case_3_label_5:',
'IEQL t4 a 3', 'JMPZ case_4_label_6 t4', 'case_5_label_0:',
'IEQL t1 b 5', 'JMPZ default_label_2 t1', 'IPRT 5',
'JUMP end_switch_label_1', 'default_label_2:',
'JUMP end_switch_label_1', 'end_switch_label_1:',
'JUMP end_switch_label_7', 'case_4_label_6:', 'IEQL t5 a 4',
'JMPZ default_label_8 t5', 'IPRT 4', 'JUMP end_switch_label_7',
'default_label_8:', 'IPRT 0', 'end_switch_label_7:', 'HALT'
])