def expand_inner_escapes(element: Element, EC: ExpansionContext):
aquote = element.code
# If we have a quote escape, expand sub-elements
if is_form(aquote, "~"):
assert len(aquote) == 2
EC.expand(aquote[1])
# otherwise, recurse on nodes, ignore the rest
elif isinstance(aquote, Node):
for e in aquote:
Quote.expand_inner_escapes(e, EC)
def expand_inner_escapes(element:Element, EC:ExpansionContext):
aquote = element.code
# If we have a quote escape, expand sub-elements
if is_form(aquote, "~"):
assert len(aquote) == 2
EC.expand(aquote[1])
# otherwise, recurse on nodes, ignore the rest
elif isinstance(aquote, Node):
for e in aquote:
Quote.expand_inner_escapes(e, EC)
def expand(self, element: Element, EC: ExpansionContext):
code = element.code
# expand downwards by cases
if isinstance(code, Form):
head = code.first
headcode = head.code
# check if any macros apply
if is_identifier(headcode):
if headcode.full_name in EC.macros:
EC.macros[headcode.full_name].expand(element, EC)
elif headcode.full_name in EC.special_forms:
EC.special_forms[headcode.full_name].expand(element, EC)
# otherwise expand recursively
else:
for item in code:
EC.expand(item)
elif isinstance(code, Seq):
# expand all elements in the seq
for item in code:
EC.expand(item)
elif isinstance(code, Literal):
pass
elif isinstance(code, Identifier):
# IDENTIFIER MACROS
if code.full_name in EC.id_macros:
idmac = EC.id_macros[code.full_name]
idmac.expand(element, EC)
# element.parent.replace(element, idmac.expand(element, context))
elif code.full_name in EC.macros:
raise MacroExpansionError(
code.range,
"Refering to macro `%s` by name requires the use of `the`."
% code.full_name)
def expand_unit(self, unit: Node, **kwargs):
assert (isinstance(unit, Node))
context_root_bindings = Record(
default_expander=self,
expander=self,
macros=default_macro_table(),
id_macros=default_id_macro_table(),
special_forms=default_special_forms_table())
context_root_bindings.update(kwargs)
EC = ExpansionContext(**context_root_bindings.__dict__)
#unit.cg_context = EC
for element in unit:
EC.expand(element)
return EC
def expand(self, element:Element, EC:ExpansionContext):
acode = element.code
sig = acode[1].code
mac_name = sig[0].code.full_name
param_names = [p.code.full_name for p in sig[1:]]
body = [s.code for s in acode[2:]]
# TODO: implement multistatement definitions
assert len(body) == 1
# we are supposed to RUN this statement and take the result
# as the replacement, but for now this just uses the code itself
rcode = body[0]
mac = Macro(specs=(param_names, rcode))
EC.macro_table[mac_name] = mac
def expand(self, element:Element, EC:ExpansionContext):
for child in element.code[1:]:
EC.expand(child)
def expand(self, element: Element, EC: ExpansionContext):
for item in element.code:
EC.expand(item)
def expand_macros(code: Node):
default_expander = DefaultExpander()
c = ExpansionContext(default_expander=default_expander)
for item in code:
c.expand(item)
def expand(self, element: Element, EC: ExpansionContext):
for item in element.code:
EC.expand(item)
def expand(self, id_element, EC: ExpansionContext):
id_element.expand(self.substitution.copy())
EC.expand(id_element)
def expand(self, id_element, EC:ExpansionContext):
id_element.expand(self.substitution.copy())
EC.expand(id_element)
