def test_puts_function(self):
self.assertEqual(
self.parse("""
int puts(const char * string) {
int i = 0;
while (string[i] != NULL) {
putc(string[i++]);
}
putc('\\n');
return i + 1;
}
"""),
Program([
Function(
return_type=Type(base='int'),
name="puts",
params=[
VariableDeclaration(name="string",
vtype=Type(
base="pointer",
const=True,
reference=Type(base="char")))
],
body=Block([
VariableDeclaration(name="i",
vtype=Type(base="int"),
value=Int32(value=0)),
For(condition=BinaryOperation(
operator="!=",
left=ArrayDereference(
array=Variable(name="string"),
index=Variable(name="i")),
right=Null()),
body=Block([
Call(name="putc",
args=[
ArrayDereference(
array=Variable("string"),
index=PostOperation(
operator="++",
variable=Variable(name="i")))
])
])),
Call(name="putc", args=[Char('\n')]),
ReturnStatement(
value=BinaryOperation(operator="+",
left=Variable(name="i"),
right=Int32(value=1)))
]))
]))
def test_main_with_multiple_parameters(self):
self.assertEqual(
self.parse(
"int main(int argc, char **argv, char **env) { return 0; }"),
Program(units=[
Function(return_type=Type(base='int'),
name="main",
params=[
VariableDeclaration(name="argc",
vtype=Type(base="int")),
VariableDeclaration(
name="argv",
vtype=Type(base="pointer",
reference=Type(base="pointer",
reference=Type(
base="char")))),
VariableDeclaration(
name="env",
vtype=Type(base="pointer",
reference=Type(base="pointer",
reference=Type(
base="char")))),
],
body=Block([ReturnStatement(value=Int32(value=0))]))
]))
def function_wrap_node(self, node):
return Program([
Function(return_type=Type(base="int"),
name="main",
params=[],
body=Block([node]))
])
def test_main_with_no_parameters(self):
self.assertEqual(
self.parse("int main(void) { return 0; }"),
Program(units=[
Function(return_type=Type(base='int'),
name="main",
params=[],
body=Block([ReturnStatement(value=Int32(value=0))]))
]))
def test_if_loop(self):
self.assertEqual(
self.parse(self.function_wrap("if ( i > 10 ) { i++; } ")),
self.function_wrap_node(
If(
condition=BinaryOperation(operator=">",
left=Variable(name="i"),
right=Int32(value=10)),
body=Block([
PostOperation(operator="++",
variable=Variable(name="i"))
]),
)))
def test_auxiliary_function(self):
self.assertEqual(
self.parse("""
int foo(void) {
return 12;
}
int main(void) {
return foo();
}
"""),
Program([
Function(return_type=Type(base='int'),
name="foo",
params=[],
body=Block(
[ReturnStatement(value=Int32(value=12))], )),
Function(return_type=Type(base='int'),
name="main",
params=[],
body=Block([
ReturnStatement(value=Call(name="foo",
args=[]), ),
])),
]))
def test_for_loop(self):
self.assertEqual(
self.parse(
self.function_wrap("for ( i = 0; i < 10; i++ ) { putc(i); }")),
self.function_wrap_node(
For(
initial=Assignment(left=Variable(name="i"),
right=Int32(value=0)),
condition=BinaryOperation(operator="<",
left=Variable(name="i"),
right=Int32(value=10)),
increment=PostOperation(operator="++",
variable=Variable(name="i")),
body=Block([Call(name="putc", args=[Variable(name="i")])]),
)))
def test_function_arguments(self):
self.assertEqual(
self.parse("int puts(const char* string) { return 0; }"),
Program([
Function(return_type=Type(base='int'),
name="puts",
params=[
VariableDeclaration(
name="string",
vtype=Type(base="pointer",
const=True,
reference=Type(base="char")))
],
body=Block([ReturnStatement(value=Int32(value=0))]))
]))
def test_main_function(self):
self.assertEqual(
self.parse("""
int main(void) {
return puts("Hello, world!");
}
"""),
Program([
Function(return_type=Type(base='int'),
name="main",
params=[],
body=Block([
ReturnStatement(value=Call(
name="puts", args=[String("Hello, world!")]))
]))
]))
def test_braceless_while_loop(self):
self.assertEqual(
self.parse(
self.function_wrap("""
while ( i < 10 )
i++;
""")),
self.function_wrap_node(
For(
condition=BinaryOperation(operator="<",
left=Variable(name="i"),
right=Int32(value=10)),
body=Block([
PostOperation(operator="++",
variable=Variable(name="i"))
]),
)))
def test_while_loop(self):
self.assertEqual(
self.parse(
self.function_wrap(
"while (string[i] != NULL) { putc(string[i++]); }")),
self.function_wrap_node(
For(condition=BinaryOperation(
operator="!=",
left=ArrayDereference(array=Variable(name="string"),
index=Variable("i")),
right=Null()),
body=Block([
Call(name="putc",
args=[
ArrayDereference(
array=Variable("string"),
index=PostOperation(
operator="++",
variable=Variable(name="i")))
])
]))))
def for_loop_single_line(self, p):
return For(initial=p[2],
condition=p[4],
increment=p[6],
body=Block(statements=[p[8]]))
def while_loop_single_line(self, p):
return For(condition=p[2], body=Block(statements=[p[4]]))
def block_statement_list(self, p):
return Block(statements=p[1].get_items())