def m_let(block, args):
if not isinstance(args[0], tuple):
raise NoodleSyntaxError("bad let call; first arg must be tuple")
if len(args) < 1:
raise NoodleSyntaxError("empty let call")
translator = block.push_var_translator()
mynumber = unique_name()
for vardef in args[0]:
if not isinstance(vardef, tuple):
raise NoodleSyntaxError(
"bad let call; variable binding must be tuple"
)
if len(vardef) != 2 or not isinstance(vardef[0], Symbol):
raise NoodleSyntaxError(
"bad let call; variable binding must be (identifier value)"
)
name = vardef[0].name
mungedname = mynumber + name
translator[name] = mungedname
for varname, varvalue in args[0]:
block.compile_piece(varvalue)
block.emit_store_name(varname.name, dup=False)
begin(block, args[1:])
if block.pop_var_translator() is not translator:
raise NoodleCompilerError("Unexpected var translator popped")
return NoCompilation
def force_add_local(self, varname=None):
if varname is None:
varname = unique_name()
varlist = self.loadscopes['local'][1]
varlist.append(varname)
return varname
def define_lambda(block, args, steps, codename='*lambda*'):
given_posargs, func_defaultargs, func_vararg, func_kwarg = \
decode_function_arguments(args)
func_posargs = []
codetuple = [Symbol('begin')]
for element in given_posargs:
if isinstance(element, tuple):
specialname = Symbol(unique_name())
func_posargs.append(specialname)
codetuple.append((Symbol('='), element, specialname))
else:
if not isinstance(element, Symbol):
raise NoodleSyntaxError(
"Defined arguments to a function must be symbols"
)
func_posargs.append(element)
arglist = list([pos.name for pos in func_posargs])
codeflags = 0
for name, val in func_defaultargs:
arglist.append(name.name)
block.compile_piece(val)
if func_vararg:
arglist.append(func_vararg.name)
codeflags |= 0x4 # uses *args syntax
if func_kwarg:
arglist.append(func_kwarg.name)
codeflags |= 0x8 # uses **kwargs syntax
# (final) stack changes to result from this MAKE_FUNCTION call.
# Doesn't yet take into account free variables to be loaded and
# consumed.
block.stackmove(-len(func_defaultargs))
# docstring
docstring = None
if len(steps) > 0 and isinstance(steps[0], str):
docstring = steps[0]
steps = steps[1:]
block.code.append(CreateSubBlock(
block.subfunc(
tuple(codetuple) + tuple(steps),
firstlineno=block.curlineno,
varnames=arglist,
argcount=(len(func_posargs) + len(func_defaultargs)),
codename=codename,
codeflags=codeflags,
docstring=docstring,
nopassmacros={
codename: make_recursive_apply(
codename,
[n.name for n in func_posargs] +
[p[0].name for p in tuple(func_defaultargs)]
),
'return': m_return,
'yield': m_yield
}
),
block,
len(func_defaultargs)
))
block.stackmove(1)
def m_gensym(block, args):
return (Symbol('mksymbol'), unique_name())
