def compile_return(self, tree, code):
"Compile a return statement."
vals = tree.children[1].children
for val in vals:
self.compile_expression(val, code)
if self._current_def_name == 'program':
vrs = []
expr_count = 1
for v in tree.children[1].children:
if v.children[0] == 'varName':
vrs.append(v.children[1].value)
else:
vrs.append("#%s" % (expr_count,))
expr_count += 1
if hasattr(tree, 'type_annot'):
# Decorate the return variables with their types.
types = [
repr(subtype)
for subtype in tree.type_annot.subtypes()
]
vrs = [
gbs_builtins.polyname(vname, [vtype])
for vname, vtype in zip(vrs, types)
]
code.push(('returnVars', len(vals), vrs), near=tree)
else:
code.push(('return', len(vals)), near=tree)
def _compile_func_call_poly(self, tree, funcname, args, code):
"Compile a potentially polymorphic function call."
polys = gbs_builtins.BUILTINS_POLYMORPHIC
annotate = True
annotate = annotate and funcname in polys
annotate = annotate and hasattr(tree, 'type_annotation')
annotate = annotate and isinstance(tree.type_annotation, list)
type_annotation = None
if hasattr(tree, 'type_annotation'):
type_annotation = tree.type_annotation
for i, arg in zip(range(len(args)),args):
self.compile_expression(arg, code)
if annotate:
funcname = gbs_builtins.polyname(
funcname,
[repr(ann) for ann in tree.type_annotation])
code.push(('call', funcname, len(args)), near=tree)
