def compileDeflang(self, name, parentx, body):
assert isinstance(name, Symbol)
if parentx:
assertResult(parentx, "derive language from")
parent = topy(parentx)
else:
parent = logixglobal('langlang')
funcname = "#lang:%s" % name
body = len(body) > 0 and block(body, False).nodes or []
funcbody = ast.Stmt(
body
+ [ast.CallFunc(ast.Getattr(ast.Getattr(ast.Name(str(name)),
'__impl__'),
'addDeflangLocals'),
[ast.CallFunc(ast.Name('locals'), [])])])
res = ast.Stmt([
ast.Assign([compilePlace(Symbol(name))],
ast.CallFunc(logixglobal('defLanguage'),
[ast.Const(str(name)),
parent,
ast.CallFunc(GlobalName("globals"), [])])),
astFunction(funcname, tuple(), tuple(), 0, None, funcbody),
ast.CallFunc(ast.Name(funcname), []),
ast.AssName(funcname, 'OP_DELETE')])
lineno = getmeta(self, 'lineno')
for n in res.nodes:
n.lineno = lineno
res.lineno = lineno
return res
def quote(obj, depth=1):
assert depth > 0
if isinstance(obj, rootops.quote):
depth += 1
elif isinstance(obj, rootops.escape):
extra = obj.__operands__.get('extra', [])
escapelevel = 1 + len(extra)
if escapelevel > depth:
raise CompileError("invalid quote escape")
elif escapelevel == depth:
if obj.__operands__.hasField('splice'):
raise CompileError("Can't splice here")
elif obj.__operands__.hasField("localmodule"):
return topy(localModuleQuote())
else:
assertResult(obj[0], "insert into quote")
return topy(obj[0])
if isinstance(type(obj), OperatorType):
# {{{ generate code to build the operator
cls = obj.__class__
if cls.__module__ == '%s.rootops' % logixModuleName:
classx = ast.Getattr(logixglobal('rootops'), cls.__name__)
else:
optoken = obj.__class__.__syntax__.token
classx = compileGetOp(obj)
operands = macros.gensym("operands")
return ast.Stmt([ast.Assign([compilePlace(operands)],
quotedArgs(obj.__operands__, depth)),
ast.CallFunc(classx, [],
ast.Getattr(topy(operands), "elems"),
ast.Getattr(topy(operands), "fields"))])
# }}}
elif isinstance(obj, flist):
# {{{ generate code to build the flist
return quotedArgs(obj, depth)
# }}}
elif isinstance(obj, Symbol):
# {{{ generate code to build the symbol
return ast.CallFunc(logixglobal('Symbol'), [ast.Const(obj.asStr())])
# }}}
elif isinstance(obj, (tuple, list, dict)):
# Q: Is this ok?
assert 0, "didn't expect one of those to be quoted"
else:
return topy(obj)
def apply(self, ruleName, codeName='', *exprs):
"""
Create a call to self.apply(ruleName, *args).
"""
args = [self.compilePythonExpr(codeName, arg) for arg in exprs]
if ruleName == "super":
return ast.CallFunc(ast.Getattr(ast.Name("self"),
"superApply"),
[ast.Const(codeName)] + args,
None, None)
return ast.CallFunc(ast.Getattr(ast.Name("self"),
"apply"),
[ast.Const(ruleName)] + args,
None, None)
def compileGetOp(op):
lang = op.__language__
opmodname = op.__language__.__module__
if opmodname == modulename:
langexpr = GlobalName(lang.__impl__.name)
else:
langexpr = ast.Getattr(ast.Subscript(logixglobal('lmodules'),
'OP_APPLY',
[ast.Const(opmodname)]),
lang.__impl__.name)
return ast.Subscript(
ast.Getattr(ast.Getattr(langexpr, '__impl__'), 'operators'),
'OP_APPLY',
[ast.Const(op.__syntax__.token)])
def flist(obj):
for x in obj: assertResult(x, 'use in flist')
return ast.CallFunc(ast.Getattr(logixglobal('flist'), 'new'),
[ast.List(map(topy, obj.elems)),
ast.Dict([(ast.Const(n), topy(v))
for n,v in obj.items()])])
def _do_FieldExpression(self, node, context):
expr = self.transform(node.Target)
attrname = str(node.Name)
if context == OP_APPLY:
return ast.Getattr(expr, attrname)
else:
return ast.AssAttr(expr, attrname, context)
def dot(self, expr, field):
"."
assertResult(expr, "get attribute from")
if isinstance(field, Symbol):
return ast.Getattr(topy(expr), str(field))
else:
raise CompileError("object field must be a symbol (got %s)" % field)
def exactly(self, expr):
"""
Create a call to self.exactly(expr).
"""
return ast.CallFunc(ast.Getattr(ast.Name("self"),
"exactly"),
[ast.Const(expr)],
None, None)
def many1(self, expr):
"""
Create a call to self.many((lambda: expr), expr).
"""
f = ast.Lambda([], [], 0, expr)
f.filename = self.name
return ast.CallFunc(ast.Getattr(ast.Name("self"),
"many"),
[f, expr],
None, None)
def listpattern(self, exprs):
"""
Create a call to self.listpattern(lambda: exprs).
"""
f = ast.Lambda([], [], 0, exprs)
f.filename = self.name
return ast.CallFunc(ast.Getattr(ast.Name("self"),
"listpattern"),
[f],
None, None)
def pred(self, expr):
"""
Create a call to self.pred(lambda: expr).
"""
f = ast.Lambda([], [], 0, expr)
f.filename = self.name
return ast.CallFunc(ast.Getattr(ast.Name("self"),
"pred"),
[f],
None, None)
def compileGetOp(symbol):
lang = language.getLanguage(symbol.namespace)
if lang is None:
debug()
raise CompileError, "not an operator symbol: %s" % symbol
opmodname = lang.__module__
if opmodname == modulename:
langexpr = GlobalName(lang.__impl__.name)
else:
langexpr = ast.Getattr(ast.Subscript(logixglobal('lmodules'),
'OP_APPLY',
[ast.Const(opmodname)]),
lang.__impl__.name)
return ast.Subscript(
ast.Getattr(ast.Getattr(langexpr, '__impl__'), 'operators'),
'OP_APPLY',
[ast.Const(symbol.name)])
def compilePythonExpr(self, name, expr):
"""
Compile an embedded Python expression.
@param name: The current rule name.
@param expr: The Python expression to compile.
"""
c = python_compile(expr, "<grammar rule %s>" % (name,), "eval")
return ast.Stmt([
ast.CallFunc(ast.Name('eval'),
[ast.Const(c),
ast.Getattr(ast.Name("self"), "globals"),
ast.Name('__locals')])])
def compileGetops(self, fromlang, *ops, **kw):
targetlang = kw.get("lang")
if targetlang is None:
raise CompileError("No target language for getops"
"(getops in non-exec parse?)")
assertResult(fromlang, "get operators from")
lineno = getmeta(self, 'lineno')
lastdot = targetlang.rfind('.')
if lastdot == -1:
targetlangexpr = GlobalName(targetlang)
else:
assert 0, ("PROBE: Why are we getting ops into an imported language?")
langname = targetlang[lastdot+1:]
langmod = targetlang[:lastdot]
targetlangexpr = ast.Getattr(ast.Subscript(logixglobal('lmodules'),
'OP_APPLY',
[ast.Const(langmod)]),
langname)
if len(ops) == 0:
# get all operators
res = ast.CallFunc(ast.Getattr(ast.Getattr(targetlangexpr, '__impl__'),
'addAllOperators'),
[topy(fromlang)])
else:
stmts = [ast.CallFunc(ast.Getattr(ast.Getattr(targetlangexpr, '__impl__'),
'addOp'),
[compileGetOp(op)])
for op in ops]
for s in stmts: s.lineno = lineno
res = ast.Stmt(stmts)
res.lineno = lineno
return res
def _or(self, exprs):
"""
Create a call to
self._or([lambda: expr1, lambda: expr2, ... , lambda: exprN]).
"""
fs = []
for expr in exprs:
f = ast.Lambda([], [], 0, expr)
f.filename = self.name
fs.append(f)
return ast.CallFunc(ast.Getattr(ast.Name("self"),
"_or"),
[ast.List(fs)],
None, None)
def Doc(doc):
rootopCompiler = rootopCompilers.get(doc.tag)
if rootopCompiler:
return rootopCompiler(doc)
else:
op = language.getOp(doc.tag)
if op:
pycompile = getattr(op, "pycompile", None)
if pycompile:
return doc.applyTo(pycompile, op)
# Assume it's a function operator - call op.func
return compileFunctionCall(ast.Getattr(compileGetOp(doc.tag), "func"),
list(doc.content()),
dict(doc.properties()))
def compileGetops(doc):
fromlang = doc[0]
targetlang = doc.get("lang")
ops = [op.strip() for op in doc[1:]]
if targetlang is None:
raise CompileError("No target language for getops"
"(getops in non-exec parse?)")
assertResult(fromlang, "get operators from")
lineno = getattr(doc, 'lineno', None)
lastdot = targetlang.rfind('.')
if lastdot == -1:
def targetlangexpr():
return GlobalName(targetlang)
else:
assert 0, ("PROBE: Why are we getting ops into an imported language?")
langname = targetlang[lastdot+1:]
langmod = targetlang[:lastdot]
def targetlangexpr():
return ast.Getattr(ast.Subscript(logixglobal('lmodules'),
'OP_APPLY',
[ast.Const(langmod)]),
langname)
if len(ops) == 0:
# get all operators
res = ast.CallFunc(ast.Getattr(ast.Getattr(targetlangexpr(), '__impl__'),
'addAllOperators'),
[topy(fromlang)])
else:
stmts = [ast.CallFunc(ast.Getattr(ast.Getattr(targetlangexpr(), '__impl__'),
'addOp'),
[ast.CallFunc(ast.Getattr(ast.Getattr(topy(fromlang),
"__impl__"),
"getOp"),
[ast.Const(op), ast.Const(False)])])
for op in ops]
for s in stmts: s.lineno = lineno
res = ast.Stmt(stmts)
res.lineno = lineno
return res
def function(self, name, expr):
"""
Create a function of one argument with the given name returning the
given expr.
@param name: The function name.
@param expr: The AST to insert into the function.
"""
fexpr = ast.Stmt([ast.Assign([ast.AssName('__locals', 'OP_ASSIGN')],
ast.Dict([(ast.Const('self'),
ast.Name('self'))])),
ast.Assign([ast.Subscript(ast.Getattr(
ast.Name('self'), 'locals'),
'OP_ASSIGN',
[ast.Const(
name.split('_',1)[1])])],
ast.Name('__locals')),
expr])
f = ast.Lambda(['self'], [], 0, fexpr)
f.filename = self.name
return f
def LOAD_ATTR(decompiler, attr_name):
return ast.Getattr(decompiler.stack.pop(), attr_name)
def logixglobal(name):
return ast.Getattr(ast.Name('logix'), name)
def funcdef(self, nodelist):
if len(nodelist) == 6:
assert nodelist[0][0] == symbol.decorators
decorators = self.decorators(nodelist[0][1:])
else:
assert len(nodelist) == 5
decorators = None
lineno = nodelist[-4][2]
name = nodelist[-4][1]
args = nodelist[-3][2]
if not re.match('_q_((html|plain)_)?template_', name):
# just a normal function, let base class handle it
self.__template_type.append(None)
n = transformer.Transformer.funcdef(self, nodelist)
else:
if name.startswith(PLAIN_TEMPLATE_PREFIX):
name = name[len(PLAIN_TEMPLATE_PREFIX):]
template_type = "plain"
elif name.startswith(HTML_TEMPLATE_PREFIX):
name = name[len(HTML_TEMPLATE_PREFIX):]
template_type = "html"
elif name.startswith(TEMPLATE_PREFIX):
name = name[len(TEMPLATE_PREFIX):]
template_type = "plain"
else:
raise RuntimeError, 'unknown prefix on %s' % name
self.__template_type.append(template_type)
# Add "IO_INSTANCE = IO_CLASS()" statement at the beginning of
# the function and a "return IO_INSTANCE" at the end.
if args[0] == symbol.varargslist:
names, defaults, flags = self.com_arglist(args[1:])
else:
names = defaults = ()
flags = 0
doc = None # self.get_docstring(nodelist[-1])
# code for function
code = self.com_node(nodelist[-1])
# create an instance, assign to IO_INSTANCE
klass = ast.Name(IO_CLASS)
args = [ast.Const(template_type == "html")]
instance = ast.CallFunc(klass, args)
assign_name = ast.AssName(IO_INSTANCE, OP_ASSIGN)
assign = ast.Assign([assign_name], instance)
# return the IO_INSTANCE.getvalue(...)
func = ast.Getattr(ast.Name(IO_INSTANCE), "getvalue")
ret = ast.Return(ast.CallFunc(func, []))
# wrap original function code
code = ast.Stmt([assign, code, ret])
if sys.hexversion >= 0x20400a2:
n = ast.Function(decorators, name, names, defaults, flags, doc,
code)
else:
n = ast.Function(name, names, defaults, flags, doc, code)
n.lineno = lineno
self.__template_type.pop()
return n
def quotedDoc(doc, depth):
"""
Generate code to build a Doc like `doc` with quote-escapes
replaced by runtime values.
"""
# Each element of contentParts is either:
# an AST - meaning a spliced value - the resulting content
# should be `extend`ed by that value
# a list of ASTs - a list of regular elements, the resulting
# content should be `extend`ed by an ast.List
# with these elements
# {{{ contentParts =
contentParts = [[]]
for x in doc.content():
if isDoc(x, rootops.escape):
escapelevel = 1 + len(x.get('extra', []))
if escapelevel > depth:
raise CompileError("more quote escapes than quotes")
escape = escapelevel == depth
else:
escape = False
if escape:
if x.hasProperty("splice"):
assertResult(x[0], "insert into quote")
contentParts.append(topy(x[0]))
contentParts.append([])
elif x.hasProperty("localmodule"):
contentParts[-1].append(topy(localModuleQuote()))
else:
assertResult(x[0], "insert into quote")
contentParts[-1].append(topy(x[0]))
else:
contentParts[-1].append(quote(x, depth))
# }}}
# These properties are added to the result doc *after*
# any spliced in docs, so they overwrite any spliced properties
for v in doc.propertyValues():
assertResult(v, "use as operand")
properties = ast.Dict([(compileSymbol(n), quote(v, depth))
for n, v in doc.properties()])
# assert isinstance(contentParts[0], list)
if contentParts == [[]]:
return ast.CallFunc(logixglobal("Doc"),
[compileSymbol(doc.tag),
properties])
else:
if len(contentParts[0]) > 0:
docArg = ast.List(contentParts[0])
rest = contentParts[1:]
elif len(contentParts) > 0:
docArg = contentParts[1]
rest = contentParts[2:]
if len(rest) == 0:
return ast.CallFunc(logixglobal("Doc"),
[compileSymbol(doc.tag),
docArg,
properties])
else:
val = macros.gensym("val")
stmts = [ast.Assign([compilePlace(val)],
ast.CallFunc(logixglobal("Doc"),
[compileSymbol(doc.tag),
docArg]))]
for part in rest:
if isinstance(part, list):
if len(part) == 0:
continue
ext = ast.List(part)
else:
ext = part
stmts.append(ast.Discard(ast.CallFunc(ast.Getattr(topy(val),
"extend"),
[ext])))
stmts.append(ast.Discard(ast.CallFunc(ast.Getattr(topy(val),
"extend"),
[properties])))
stmts.append(topy(val))
return ast.Stmt(stmts)
def compileDefop(self, binding, ruledef, smartspace=None, assoc='left',
imp=None, lang=None):
if lang is None:
raise CompileError("invalid defop")
assertResult(ruledef, "use in defop")
assertResult(binding, "use in defop")
lineno = getmeta(self, 'lineno')
# {{{ token = extract from ruledef
def islit(x): return x[0][0] == 'LiteralRule'
if islit(ruledef):
token = ruledef[1]
elif ruledef[0][0] == 'SequenceRule':
rules = ruledef[1:]
if len(rules) > 1 and islit(rules[0]):
token = rules[0][1]
elif len(rules) > 1 and islit(rules[1]):
token = rules[1][1]
else:
raise CompileError("invalid ruledef")
else:
raise CompileError("invalid ruledef")
# }}}
if imp:
if imp['kind'] == 'm':
funcname = 'macro'
elif imp['kind'] == 'f':
funcname = 'func'
else:
assert 0, "invalid implementation kind: %s" % imp.kind
impfuncname = 'operator[%s]' % token
# {{{ impfunc =
argflags, argnames, argdefaults = funcArgs(imp.get('args'))
impfunc = astFunction(impfuncname,
argnames,
argdefaults,
argflags,
None, #docstring
ast.Return(block(imp['body'], True)))
impfunc.lineno = lineno
# }}}
else:
funcname = None
impfuncname = "None"
impfunc = None
lastdot = lang.rfind('.')
if lastdot == -1:
langexpr = GlobalName(lang)
else:
assert 0, "PROBE: Why are we adding an op to an imported language?"
langname = lang[lastdot+1:]
langmod = lang[:lastdot]
langexpr = ast.Getattr(ast.Subscript(logixglobal('lmodules'),
'OP_APPLY',
[ast.Const(langmod)]),
langname)
newOpCall = ast.CallFunc(
ast.Getattr(ast.Getattr(langexpr, '__impl__'), 'newOp'),
[ast.Const(token),
topy(binding),
topy(ruledef),
ast.Const(smartspace),
ast.Const(assoc),
ast.Const(funcname),
ast.Name(impfuncname)
])
if impfunc:
return ast.Stmt([impfunc, newOpCall])
else:
return newOpCall
def compileGetRuleClass(op, classname):
return ast.Getattr(logixglobal('parser'), classname)
def compileOperator(op):
getOpFunc = ast.Getattr(compileGetOp(op), 'func')
return compileFunctionCall(getOpFunc, opargs(op), opfields(op), None, None)
def compileGetRuleClass(doc):
return ast.Getattr(logixglobal('parser'), doc[0])
def compileDefop(doc):
binding = doc['binding']
ruledef = doc['ruledef']
smartspace = doc.get('smartspace')
assoc = doc.get('assoc', 'left')
imp = doc.get('imp')
lang = doc.get('lang')
if lang is None:
raise CompileError("invalid defop")
assertResult(ruledef, "use in defop")
assertResult(binding, "use in defop")
lineno = getattr(doc, "lineno", None)
# {{{ token = extract from ruledef
def islit(x): return x[0][0] == 'LiteralRule'
if islit(ruledef):
token = ruledef[1]
elif ruledef[0][0] == 'SequenceRule':
rules = ruledef[1:]
if len(rules) > 1 and islit(rules[0]):
token = rules[0][1]
elif len(rules) > 1 and islit(rules[1]):
token = rules[1][1]
else:
raise CompileError("invalid ruledef")
else:
raise CompileError("invalid ruledef")
# }}}
if imp:
if imp['kind'] == 'm':
impkind = 'macro'
elif imp['kind'] == 'f':
impkind = 'func'
else:
assert 0, "invalid implementation kind: %s" % imp.kind
impfuncname = 'operator[%s]' % token
# {{{ impfunc =
argflags, argnames, argdefaults = funcArgs(imp.get('args'))
impfunc = astFunction(impfuncname,
argnames,
argdefaults,
argflags,
None, #docstring
ast.Return(block(imp['body'], True)))
impfunc.lineno = lineno
# }}}
impArgs = [ast.Const(impkind), ast.Name(impfuncname)]
else:
impArgs = []
lastdot = lang.rfind('.')
if lastdot == -1:
langexpr = GlobalName(lang)
else:
assert 0, "PROBE: Why are we adding an op to an imported language?"
langname = lang[lastdot+1:]
langmod = lang[:lastdot]
langexpr = ast.Getattr(ast.Subscript(logixglobal('lmodules'),
'OP_APPLY',
[ast.Const(langmod)]),
langname)
# If unmarshallable objects get into the code-object, you get a
# blanket error message, so check these before they go in.
assert isinstance(token, str)
assert isinstance(smartspace, str) or smartspace == None
assert isinstance(assoc, str)
newOpCall = ast.CallFunc(
ast.Getattr(ast.Getattr(langexpr, '__impl__'), 'newOp'),
[ast.Const(token),
topy(binding),
topy(ruledef),
ast.Const(smartspace),
ast.Const(assoc)]
+ impArgs)
if impArgs != []:
return ast.Stmt([impfunc, newOpCall])
else:
return newOpCall
def quotedArgs(operands, depth):
"""
Generate code from an flist of operand expressions, possibly containing splices.
Returns an expression that constructs an flist.
"""
parts = []
for x in operands.elems:
if isinstance(x, rootops.escape):
extra = x.__operands__.get('extra', [])
escapelevel = 1 + len(extra)
if escapelevel > depth:
raise CompileError("invalid quote escape")
escape = escapelevel == depth
else:
escape = False
if escape:
if x.__operands__.hasField("splice"):
assertResult(x[0], "insert into quote")
parts.append( ('s', topy(x[0])) ) # 's' == splice
elif x.__operands__.hasField("localmodule"):
parts.append( ('v',topy(localModuleQuote())) )
else:
assertResult(x[0], "insert into quote")
parts.append( ('v', topy(x[0])) ) # 'v' == plain value
else:
parts.append( ('v', quote(x, depth)) ) # 'v' == plain value
# {{{ expr = reduce parts to a single expression
# If there is just a single splice, then that is the expression
# otherwise generate: val = ??; val.extend(??); val.extend(??)...
def frontSection(parts):
vals = list(itools.takewhile(lambda (tag, exp): tag == 'v', parts))
if len(vals) == 0:
return parts[0][1], parts[1:]
else:
return ast.List([v[1] for v in vals]), parts[len(vals):]
if len(parts) == 0:
expr = ast.List([])
else:
first, rest = frontSection(parts)
if len(rest) == 0:
expr = first
else:
# Generate:
# val = ...; if not hasattr(val, 'extend'): val = list(val)
val = macros.gensym("val")
statements = [
ast.Assign([compilePlace(val)], first),
ast.If([(ast.CallFunc(GlobalName('isinstance'),
[topy(val), logixglobal("flist")]),
ast.Assign([compilePlace(val)],
ast.CallFunc(ast.Getattr(topy(val), "copy"),
[])))],
#else
ast.Assign([compilePlace(val)],
ast.CallFunc(GlobalName('list'), [topy(val)])))]
while len(rest) > 0:
ex, rest = frontSection(rest)
statements.append(ast.Discard(ast.CallFunc(ast.Getattr(topy(val),
"extend"),
[ex])))
statements.append(topy(val))
expr = ast.Stmt(statements)
# }}}
for v in operands.fields.values():
assertResult(v, "use as operand")
keywords = ast.Dict([(ast.Const(n), quote(v, depth))
for n, v in operands.items()])
if isinstance(expr, ast.List):
return ast.CallFunc(ast.Getattr(logixglobal("flist"), 'new'),
[expr, keywords])
else:
return ast.Add([expr, ast.CallFunc(ast.Getattr(logixglobal("flist"), 'new'),
[ast.List([]), keywords])])
def targetlangexpr():
return ast.Getattr(ast.Subscript(logixglobal('lmodules'),
'OP_APPLY',
[ast.Const(langmod)]),
langname)
