def run(self):
self.modulebuilder.IncludeFromPythonSource('runtime/term.py')
self.modulebuilder.IncludeFromPythonSource('runtime/parser.py')
self.modulebuilder.IncludeFromPythonSource('runtime/fresh.py')
self.modulebuilder.IncludeFromPythonSource('runtime/match.py')
# parse all term literals.
# ~~ 26.07.2020 disable lit terms for now, need to implement
# nt caching acceleration technique first.
"""
tmp0, tmp1 = rpy.gen_pyid_temporaries(2, self.symgen)
for trm, sym1 in self.context._litterms.items():
sym1 = rpy.gen_pyid_for(sym1)
self.modulebuilder.AssignTo(tmp0).New('Parser', rpy.PyString(repr(trm)))
self.modulebuilder.AssignTo(sym1).MethodCall(tmp0, 'parse')
"""
# variable-not-otherwise-mentioned of given define language
for ident, variables in self.context.get_variables_mentioned_all():
ident = rpy.gen_pyid_for(ident)
variables = map(lambda v: rpy.PyString(v), variables)
self.modulebuilder.AssignTo(ident).PySet(*variables)
for form in self.module.tlforms:
self._visit(form)
# generate main
fb = rpy.BlockBuilder()
symgen = SymGen()
## emit some dummy Terms to aid RPython with type inference.
tmp0, tmp1, tmp2, tmp3, tmp4 = rpy.gen_pyid_temporaries(5, symgen)
fb.AssignTo(tmp0).New('Integer', rpy.PyInt(0))
fb.AssignTo(tmp1).New('Float', rpy.PyFloat(0.0))
fb.AssignTo(tmp2).New('String', rpy.PyString("\"hello world!\""))
fb.AssignTo(tmp3).New('Boolean', rpy.PyString("#f"))
fb.AssignTo(tmp4).New('Variable', rpy.PyString("x"))
for procedure in self.main_procedurecalls:
tmpi = rpy.gen_pyid_temporaries(1, symgen)
fb.AssignTo(tmpi).FunctionCall(procedure)
fb.Return(rpy.PyInt(0))
self.modulebuilder.Function('entrypoint').WithParameters(
rpy.PyId('argv')).Block(fb)
#required entry procedure for Rpython.
fb = rpy.BlockBuilder()
fb.Return(rpy.PyTuple(rpy.PyId('entrypoint'), rpy.PyNone()))
self.modulebuilder.Function('target').WithParameters(
rpy.PyVarArg('args')).Block(fb)
# if __name__ == '__main__': entrypoint()
# for python2.7 compatibility.
ifb = rpy.BlockBuilder()
tmp = rpy.gen_pyid_temporaries(1, self.symgen)
ifb.AssignTo(tmp).FunctionCall('entrypoint', rpy.PyList())
self.modulebuilder.If.Equal(rpy.PyId('__name__'),
rpy.PyString('__main__')).ThenBlock(ifb)
return rpy.Module(self.modulebuilder.build())
def _gen_match_function_for_primitive(self, functionname, isafunction, patstr, sym=None):
# tmp0 = asafunction(term)
# if tmp0 == True:
# tmp1 = match.addtobinding(sym, term) # this is optional of sym != None; useful for holes.
# head = head + 1
# return [(match, head, tail)]
# return []
symgen = SymGen()
term, match, head, tail = rpy.gen_pyid_for('term', 'match', 'head', 'tail')
tmp0, tmp1 = rpy.gen_pyid_temporaries(2, symgen)
ifb1 = rpy.BlockBuilder()
if sym is not None:
ifb1.AssignTo(tmp0).MethodCall(match, MatchMethodTable.AddToBinding, rpy.PyString(sym), term)
ifb1.AssignTo(head).Add(head, rpy.PyInt(1))
ifb1.Return(rpy.PyList( rpy.PyTuple(match, head, tail) ))
fb = rpy.BlockBuilder()
fb.AssignTo(tmp0).FunctionCall(isafunction, term)
fb.If.Equal(tmp0, rpy.PyBoolean(True)).ThenBlock(ifb1)
fb.Return(rpy.PyList())
self.modulebuilder.SingleLineComment(patstr)
self.modulebuilder.Function(functionname).WithParameters(term, match, head, tail).Block(fb)
def transformRepeat(self, repeat):
assert isinstance(repeat, pattern.Repeat)
if self.context.get_function_for_pattern(self.languagename, repr(repeat)) is None:
match_fn = 'match_{}_term_{}'.format(self.languagename, self.symgen.get())
self.context.add_function_for_pattern(self.languagename, repr(repeat), match_fn)
# codegen enclosed pattern
self.transform(repeat.pat)
functionname = self.context.get_function_for_pattern(self.languagename, repr(repeat.pat))
# retrieve all bindable elements
assignable_symbols = repeat.getattribute(pattern.PatternAttribute.PatternVariables)
symgen = SymGen()
term, match, head, tail = rpy.gen_pyid_for('term', 'match', 'head', 'tail')
if repeat.matchmode == pattern.RepeatMatchMode.Deterministic:
tmp0, tmp1, tmp2, tmp3, tmp4 = rpy.gen_pyid_temporaries(5, symgen)
# tmp0 = match.increasedepth(...)
# while True:
# if head == tail:
# break
# tmp1 = term.get[head]
# tmp2 = match_term(tmp1, match, head, tail)
# if len(tmp2) == 0:
# break
# if len(tmp2) != 1:
# raise Exception
# tmp3 = tmp2[0]
# match = tmp3[0]
# head = tmp3[1]
# tmp4 = match.decreasedepth(...)
# return (match, head, tail)
# tmp0 = match.increasedepth(...)
# outmatches = []
# matches = [(tmp0, head, tail)]
# while len(matches) != 0:
# nmatches = []
# for m, h, t in matches:
# if h == t:
# tmp1 = (m,h,t)
# tmp1 = completedmatches.append()
# continue
# tmp2 = term.get[h]
# tmp3 = match_term(tmp2, m, h, t)
# if len(tmp3) == 0:
# completedmatches.append((m,h,t))
# continue
# nmatches = nmatches + tmp3
# matches = nmatches
# for match in outmatches:
# tmp4 = match.decreasedepth(...)
# return outmatches
matches, nmatches, outmatches = rpy.gen_pyid_for('matches', 'nmatches', 'outmatches')
m, h, t = rpy.gen_pyid_for('m', 'h', 't')
ifb1 = rpy.BlockBuilder()
ifb1.AssignTo(tmp1).PyTuple(m, h, t)
ifb1.AssignTo(tmp1).MethodCall(outmatches, 'append', tmp1)
ifb1.Continue
ifb2 = rpy.BlockBuilder()
ifb2.AssignTo(tmp4).PyTuple(m, h, t)
ifb2.AssignTo(tmp4).MethodCall(outmatches, 'append', tmp4)
ifb2.Continue
forb1 = rpy.BlockBuilder()
forb1.If.Equal(h, t).ThenBlock(ifb1)
forb1.AssignTo(tmp2).MethodCall(term, TermMethodTable.Get, h)
forb1.AssignTo(tmp3).FunctionCall(functionname, tmp2, m, h, t)
forb1.If.LengthOf(tmp3).Equal(rpy.PyInt(0)).ThenBlock(ifb2)
forb1.AssignTo(nmatches).Add(nmatches, tmp3)
whb = rpy.BlockBuilder()
whb.AssignTo(nmatches).PyList()
whb.For(m,h,t).In(matches).Block(forb1)
whb.AssignTo(matches).PyId(nmatches)
if len(assignable_symbols) != 0:
forb2 = rpy.BlockBuilder()
for bindable in assignable_symbols:
forb2.AssignTo(tmp4).MethodCall(m, MatchMethodTable.DecreaseDepth, rpy.PyString(bindable))
fb = rpy.BlockBuilder()
for bindable in assignable_symbols:
fb.AssignTo(tmp0).MethodCall(match, MatchMethodTable.IncreaseDepth, rpy.PyString(bindable))
fb.AssignTo(outmatches).PyList()
fb.AssignTo(matches).PyList( rpy.PyTuple(match, head, tail) )
fb.While.LengthOf(matches).NotEqual(rpy.PyInt(0)).Block(whb)
if len(assignable_symbols) != 0:
fb.For(m,h,t).In(outmatches).Block(forb2)
fb.Return(outmatches)
self.modulebuilder.SingleLineComment('{} deterministic'.format(repr(repeat)))
self.modulebuilder.Function(match_fn).WithParameters(term, match, head, tail).Block(fb)
if repeat.matchmode == pattern.RepeatMatchMode.NonDetermininstic:
matches, queue = rpy.gen_pyid_for('matches', 'queue')
m, h, t = rpy.gen_pyid_for('m', 'h', 't')
tmp0, tmp1, tmp2, tmp3, tmp4 = rpy.gen_pyid_temporaries(5, symgen)
# tmp0 = match.increasedepth(...)
# tmp1 = (match, head, tail)
# matches = [ tmp1 ]
# queue = [ tmp1 ]
# while len(queue) != 0:
# m, h, t = queue.pop(0)
# if h == t:
# continue
# m = m.copy()
# tmp2 = term.get[h]
# tmp3 = match_term(tmp2, m, h, t)
# matches = matches + tmp3
# queue = queue + tmp3
# for m, h, t in matches:
# tmp4 = m.decreasedepth(...)
# return matches
ifb = rpy.BlockBuilder()
ifb.Continue
wb = rpy.BlockBuilder()
wb.AssignTo(m, h, t).MethodCall(queue, 'pop', rpy.PyInt(0))
wb.If.Equal(h, t).ThenBlock(ifb)
wb.AssignTo(m).MethodCall(m, MatchMethodTable.DeepCopy)
wb.AssignTo(tmp2).MethodCall(term, TermMethodTable.Get, h)
wb.AssignTo(tmp3).FunctionCall(functionname, tmp2, m, h, t)
wb.AssignTo(matches).Add(matches, tmp3)
wb.AssignTo(queue).Add(queue, tmp3)
if len(assignable_symbols) != 0:
forb = rpy.BlockBuilder()
for bindable in assignable_symbols:
forb.AssignTo(tmp4).MethodCall(m, MatchMethodTable.DecreaseDepth, rpy.PyString(bindable))
fb = rpy.BlockBuilder()
for bindable in assignable_symbols:
fb.AssignTo(tmp0).MethodCall(match, MatchMethodTable.IncreaseDepth, rpy.PyString(bindable))
fb.AssignTo(tmp1).PyTuple(match, head, tail)
fb.AssignTo(matches).PyList(tmp1)
fb.AssignTo(queue).PyList(tmp1)
fb.While.LengthOf(queue).NotEqual(rpy.PyInt(0)).Block(wb)
if len(assignable_symbols) != 0:
fb.For(m, h, t).In(matches).Block(forb)
fb.Return(matches)
self.modulebuilder.SingleLineComment('{} non-deterministic'.format(repr(repeat)))
self.modulebuilder.Function(match_fn).WithParameters(term, match, head, tail).Block(fb)
def transformBuiltInPat(self, pat):
assert isinstance(pat, pattern.BuiltInPat)
if pat.kind == pattern.BuiltInPatKind.Any:
if self.context.get_function_for_pattern(self.languagename, repr(pat)) is None:
nameof_this_func = 'match_lang_{}_builtin_{}'.format(self.languagename, self.symgen.get())
self.context.add_function_for_pattern(self.languagename, repr(pat), nameof_this_func)
# tmp0 = match.addtobinding(sym, term)
# head = head + 1
# return [(match, head, tail)]
symgen = SymGen()
term, match, head, tail = rpy.gen_pyid_for('term', 'match', 'head', 'tail')
tmp0 = rpy.gen_pyid_temporaries(1, symgen)
fb = rpy.BlockBuilder()
fb.AssignTo(tmp0).MethodCall(match, MatchMethodTable.AddToBinding, rpy.PyString(pat.sym), term)
fb.AssignTo(head).Add(head, rpy.PyInt(1))
fb.Return(rpy.PyList( rpy.PyTuple(match, head, tail) ))
self.modulebuilder.SingleLineComment(repr(pat))
self.modulebuilder.Function(nameof_this_func).WithParameters(term, match, head, tail).Block(fb)
return pat
elif pat.kind == pattern.BuiltInPatKind.VariableNotOtherwiseDefined:
# generate isa function for variable-not-otherwise-mentioned here because we need to reference
# compile-time generated language-specific array 'langname_variable_mentioned'
if self.context.get_isa_function_name(self.languagename, pat.prefix) is None:
nameof_this_func = 'lang_{}_isa_builtin_variable_not_othewise_mentioned'.format(self.languagename)
self.context.add_isa_function_name(self.languagename, pat.prefix, nameof_this_func)
symgen = SymGen()
var, _ = self.context.get_variables_mentioned(self.languagename)
var = rpy.gen_pyid_for(var)
term = rpy.gen_pyid_for('term')
tmp0, tmp1 = rpy.gen_pyid_temporaries(2, symgen)
fb = rpy.BlockBuilder()
fb.AssignTo(tmp0).FunctionCall(TermHelperFuncs.TermIsVariableNotOtherwiseMentioned, term, var)
fb.Return(tmp0)
self.modulebuilder.SingleLineComment('#Is this term {}?'.format(pat.prefix))
self.modulebuilder.Function(nameof_this_func).WithParameters(term).Block(fb)
"""
# tmp0 = term.kind()
# if tmp0 == TermKind.Variable:
# tmp1 = term.value()
# if tmp1 not in var:
# return True
# return False
# This one is different from other built-in isa funcs because we do set membership test here.
ifb2 = rpy.BlockBuilder()
ifb2.Return(rpy.PyBoolean(True))
ifb1 = rpy.BlockBuilder()
ifb1.AssignTo(tmp1).MethodCall(term, TermMethodTable.Value)
ifb1.If.NotContains(tmp1).In(var).ThenBlock(ifb2)
fb = rpy.BlockBuilder()
fb.If.IsInstance(term, 'Variable').ThenBlock(ifb1)
fb.Return(rpy.PyBoolean(False))
self.modulebuilder.SingleLineComment('#Is this term {}?'.format(pat.prefix))
self.modulebuilder.Function(nameof_this_func).WithParameters(term).Block(fb)
"""
##----- generate actual match function
if self.context.get_function_for_pattern(self.languagename, repr(pat)) is None:
nameof_this_func = 'match_lang_{}_builtin_{}'.format(self.languagename, self.symgen.get())
self.context.add_function_for_pattern(self.languagename, repr(pat), nameof_this_func)
isafunc = self.context.get_isa_function_name(self.languagename, pat.prefix)
self._gen_match_function_for_primitive(nameof_this_func, isafunc, repr(pat), sym=pat.sym)
return pat
else:
if self.context.get_function_for_pattern(self.languagename, repr(pat)) is None:
pat_isA_tab = {
pattern.BuiltInPatKind.Number: TermHelperFuncs.TermIsNumber,
pattern.BuiltInPatKind.Integer: TermHelperFuncs.TermIsInteger,
pattern.BuiltInPatKind.Natural: TermHelperFuncs.TermIsNatural,
pattern.BuiltInPatKind.Float: TermHelperFuncs.TermIsFloat,
pattern.BuiltInPatKind.String: TermHelperFuncs.TermIsString,
pattern.BuiltInPatKind.Boolean: TermHelperFuncs.TermIsBoolean,
pattern.BuiltInPatKind.Hole: TermHelperFuncs.TermIsHole,
}
try:
term_func = pat_isA_tab[pat.kind]
nameof_this_func = 'match_lang_{}_builtin_{}'.format(self.languagename, self.symgen.get())
self.context.add_function_for_pattern(self.languagename, repr(pat), nameof_this_func)
if pat.kind == pattern.BuiltInPatKind.Hole:
# 'hole' key is not present in the final Match object.
self._gen_match_function_for_primitive(nameof_this_func, term_func, repr(pat))
else:
self._gen_match_function_for_primitive(nameof_this_func, term_func, repr(pat), sym=pat.sym)
except KeyError:
assert False, 'unsupported pattern' + pat.kind
return pat
def transformInHole(self, pat):
assert isinstance(pat, pattern.InHole)
if not self.context.get_function_for_pattern(self.languagename, repr(pat)):
functionname = 'lang_{}_builtin_inhole_{}'.format(self.languagename, self.symgen.get())
self.context.add_function_for_pattern(self.languagename, repr(pat), functionname)
# 1. Look up all the terms that match pat2. Store (term, [match]) pairs.
# 2. For each matching term,
# 1. Replace term with hole
# 2. Try match pat1. If match is successful, copy term recursively starting from hole,
# and add appropriate binding into matches associated with the term.
# 3. Replace hole with term to restore the whole term to it's original state.
pat1, pat2 = pat.pat1, pat.pat2
self.transform(pat1)
self.transform(pat2)
matchpat1 = self.context.get_function_for_pattern(self.languagename, repr(pat1))
matchpat2 = self.context.get_function_for_pattern(self.languagename, repr(pat2))
assignable_syms1 = pat1.getattribute(pattern.PatternAttribute.PatternVariables)
assignable_syms2 = pat2.getattribute(pattern.PatternAttribute.PatternVariables)
assignable_syms_all = assignable_syms1.union(assignable_syms2)
# def inhole(term, match, head, tail, path):
# matches = []
# inpat2match = Match(...)
# pat2matches = pat2matchfunc(term, inpat2match, 0, 1)
# if len(pat2matches) != 0:
# inpat1match = Match(...)
# tmp0 = path + [term]
# tmp1 = copy_path_and_replace_last(tmp0, hole)
# pat1matches = pat1matchfunc(tmp1, inpat1match, 0, 1)
# if len(pat1matches) != 0:
# tmp11 = head + 1
# for m1, h1, t1 in pat1matches:
# for m2, h2, t2 in pat2matches:
# tmp2 = combine_matches(m1, m2)
# tmp{i} = match.copy()
# tmp{j} = tmp2.getbinding(...) ; same for inpat2match
# tmp{k} = tmp{i}.addtobinding(..., tmp{j}) ; same for inpat2match
# tmp3 = matches.append((tmp{i}, tmp11, tail))
# tmp4 = term.kind()
# if tmp4 == Term.Sequence:
# tmp5 = path.append(term)
# tmp6 = term.length()
# for tmp10 in range(tmp6):
# tmp7 = term.get(tmp10)
# tmp8 = inhole(tmp7, match, head, tail, path)
# matches = matches + tmp8
# tmp9 = path.pop()
# return matches
symgen = SymGen()
lookupfuncname = 'lang_{}_inhole_{}_impl'.format(self.languagename, self.symgen.get())
matches, hole = rpy.gen_pyid_for('matches', '{}_hole'.format(self.languagename))
term, match, head, tail, path = rpy.gen_pyid_for('term', 'match', 'head', 'tail', 'path')
m1, h1, t1 = rpy.gen_pyid_for('m1', 'h1', 't1')
m2, h2, t2 = rpy.gen_pyid_for('m2', 'h2', 't2')
pat1matches, inpat1match = rpy.gen_pyid_for('pat1matches', 'inpat1match')
pat2matches, inpat2match = rpy.gen_pyid_for('pat2matches', 'inpat2match')
tmp0, tmp1, tmp2, tmp3, tmp4 = rpy.gen_pyid_temporaries(5, symgen)
tmp5, tmp6, tmp7, tmp8, tmp9 = rpy.gen_pyid_temporaries(5, symgen)
tmp10, tmp11, tmp12 = rpy.gen_pyid_temporaries(3, symgen)
tmpm = rpy.gen_pyid_temporaries(1, symgen)
forb2 = rpy.BlockBuilder()
forb2.AssignTo(tmp2).FunctionCall(MatchHelperFuncs.CombineMatches, m1, m2)
forb2.AssignTo(tmpm).MethodCall(match, MatchMethodTable.DeepCopy)
for sym in assignable_syms_all:
tmpi, tmpj = rpy.gen_pyid_temporaries(2, symgen)
forb2.AssignTo(tmpi).MethodCall(tmp2, MatchMethodTable.GetBinding, rpy.PyString(sym))
forb2.AssignTo(tmpj).MethodCall(tmpm, MatchMethodTable.AddToBinding, rpy.PyString(sym), tmpi)
forb2.AssignTo(tmp3).MethodCall(matches, 'append', rpy.PyTuple(tmpm, tmp11, tail))
forb1 = rpy.BlockBuilder()
forb1.For(m2, h2, t2).In(pat2matches).Block(forb2)
ifb0 = rpy.BlockBuilder()
ifb0.AssignTo(tmp11).Add(head, rpy.PyInt(1))
ifb0.AssignTo(tmp2).FunctionCall(MatchHelperFuncs.CartesianProductAndCombineWith, pat1matches, pat2matches, match, tmp11, tail)
ifb0.AssignTo(matches).Add(matches, tmp2)
#ifb0.For(m1, h1, t1).In(pat1matches).Block(forb1)
ifb1 = rpy.BlockBuilder()
ifb1.AssignTo(inpat1match).New('Match', self._assignable_symbols_to_rpylist(assignable_syms1))
ifb1.AssignTo(tmp0).Add(path, rpy.PyList(term))
ifb1.AssignTo(tmp1).FunctionCall(TermHelperFuncs.CopyPathAndReplaceLast, tmp0, hole)
ifb1.AssignTo(pat1matches).FunctionCall(matchpat1, tmp1, inpat1match, rpy.PyInt(0), rpy.PyInt(1))
ifb1.If.LengthOf(pat1matches).NotEqual(rpy.PyInt(0)).ThenBlock(ifb0)
# ---------------
forb1 = rpy.BlockBuilder()
forb1.AssignTo(tmp7).MethodCall(term, TermMethodTable.Get, tmp10)
forb1.AssignTo(tmp8).FunctionCall(lookupfuncname, tmp7, match, head, tail, path)
forb1.AssignTo(matches).Add(matches, tmp8)
ifb3 = rpy.BlockBuilder()
ifb3.AssignTo(tmp5).MethodCall(path, 'append', term)
ifb3.AssignTo(tmp6).MethodCall(term, TermMethodTable.Length)
ifb3.For(tmp10).InRange(tmp6).Block(forb1)
ifb3.AssignTo(tmp9).MethodCall(path, 'pop')
# ----------------
fb = rpy.BlockBuilder()
fb.AssignTo(matches).PyList()
fb.AssignTo(inpat2match).New('Match', self._assignable_symbols_to_rpylist(assignable_syms2))
fb.AssignTo(pat2matches).FunctionCall(matchpat2, term, inpat2match, rpy.PyInt(0), rpy.PyInt(1))
fb.If.LengthOf(pat2matches).NotEqual(rpy.PyInt(0)).ThenBlock(ifb1)
#fb.AssignTo(tmp4).MethodCall(term, TermMethodTable.Kind)
fb.If.IsInstance(term, 'Sequence').ThenBlock(ifb3)
fb.Return(matches)
self.modulebuilder.SingleLineComment('{}'.format(repr(pat)))
self.modulebuilder.Function(lookupfuncname).WithParameters(term, match, head, tail, path).Block(fb)
#-------- this produces top-level function with empty list representing the path.
# We do constraint checking here also.
symgen = SymGen()
m, h, t = rpy.gen_pyid_for('m', 'h', 't')
fb = rpy.BlockBuilder()
fb.AssignTo(tmp0).FunctionCall(lookupfuncname, term, match, head, tail, rpy.PyList())
if pat.constraintchecks != None:
fb.AssignTo(matches).PyList()
forb = rpy.BlockBuilder()
for chck in pat.constraintchecks:
tmpi = rpy.gen_pyid_temporaries(1, symgen)
ifb = rpy.BlockBuilder()
ifb.Continue
forb.AssignTo(tmpi).MethodCall(m, MatchMethodTable.CompareKeys, rpy.PyString(chck.sym1), rpy.PyString(chck.sym2))
forb.If.NotEqual(tmpi, rpy.PyBoolean(True)).ThenBlock(ifb)
tmp = rpy.gen_pyid_temporaries(1, symgen)
forb.AssignTo(tmp).MethodCall(matches, 'append', rpy.PyTuple(m, h, t))
fb.For(m, h, t).In(tmp0).Block(forb)
fb.Return(matches)
else:
fb.Return(tmp0)
self.modulebuilder.Function(functionname).WithParameters(term, match, head, tail).Block(fb)
def transformPatSequence(self, seq):
assert isinstance(seq, pattern.PatSequence)
if self.context.get_function_for_pattern(self.languagename, repr(seq)) is None:
match_fn = 'language_{}_match_term_{}'.format(self.languagename, self.symgen.get())
self.context.add_function_for_pattern(self.languagename, repr(seq), match_fn)
# generate code for all elements of the sequence.
for pat in seq:
if not isinstance(pat, pattern.CheckConstraint):
self.transform(pat)
# symgen for the function
symgen = SymGen()
term, match, head, tail = rpy.gen_pyid_for('term', 'match', 'head', 'tail')
m, h, t = rpy.gen_pyid_for('m', 'h', 't')
subhead, subtail = rpy.gen_pyid_for('subhead', 'subtail')
fb = rpy.BlockBuilder()
# ensure term is actually a sequence.
#
# tmp{i} = term.kind()
# if tmp{i} != TermKind.Sequence:
# return []
tmpi = rpy.gen_pyid_temporaries(1, symgen)
ifb = rpy.BlockBuilder()
ifb.Return(rpy.PyList())
fb.If.NotIsInstance(term, 'Sequence').ThenBlock(ifb)
# 'enter' the term
# subhead = 0
# subtail = term.length()
fb.AssignTo(subhead).PyInt(0)
fb.AssignTo(subtail).MethodCall(term, TermMethodTable.Length)
# ensure number of terms in the sequence is at least equal to number of non Repeat patterns.
# if num_required is zero, condition is always false.
# tmp{i} = subtail - subhead
# if tmp{i} < num_required:
# return []
num_required = seq.get_number_of_nonoptional_matches_between(0, len(seq))
tmpi = rpy.gen_pyid_temporaries(1, symgen)
ifb = rpy.BlockBuilder()
ifb.Return(rpy.PyList())
fb.AssignTo(tmpi).Subtract(subtail, subhead)
fb.If.LessThan(tmpi, rpy.PyInt(num_required)).ThenBlock(ifb)
# stick initial match object into array - simplifies codegen.
previousmatches = rpy.gen_pyid_for('matches')
fb.AssignTo(previousmatches).PyList( rpy.PyTuple(match, subhead, subtail) )
for i, pat in enumerate(seq):
matches = rpy.gen_pyid_temporary_with_sym('matches', symgen)
if isinstance(pat, pattern.Repeat) :
# matches{i} = [] # get temporary with symbol
# for m,h,t in matches{i-1}:
# tmp{i} = matchfn(term, m, h, t)
# matches{i} = matches{i} + tmp{i}
functionname = self.context.get_function_for_pattern(self.languagename, repr(pat))
tmpi, tmpj = rpy.gen_pyid_temporaries(2, symgen)
forb = rpy.BlockBuilder()
forb.AssignTo(tmpi).FunctionCall(functionname, term, m, h, t)
forb.AssignTo(matches).Add(matches, tmpi)
fb.AssignTo(matches).PyList()
fb.For(m, h, t).In(previousmatches).Block(forb)
# ensure number of terms in the sequence is at least equal to number of non Repeat patterns after
# this repeat pattern.
#
# matches{i} = []
# for m, h, t in matches{i-1}:
# tmp{i} = t - h
# if tmp{i} >= num_required:
# tmp{j} = matches{i}.append((m, h, t))
# if len(matches{i}) == 0:
# return matches{i}
num_required = seq.get_number_of_nonoptional_matches_between(i, len(seq))
if num_required > 0:
previousmatches = matches
matches = rpy.gen_pyid_temporary_with_sym('matches', symgen)
tmpi, tmpj = rpy.gen_pyid_temporaries(2, symgen)
ifb1 = rpy.BlockBuilder()
ifb1.AssignTo(tmpj).MethodCall(matches, 'append', rpy.PyTuple(m, h, t))
forb = rpy.BlockBuilder()
forb.AssignTo(tmpi).Subtract(t, h)
forb.If.GreaterEqual(tmpi, rpy.PyInt(num_required)).ThenBlock(ifb1)
ifb2 = rpy.BlockBuilder()
ifb2.Return(matches)
fb.AssignTo(matches).PyList()
fb.For(m, h, t).In(previousmatches).Block(forb)
fb.If.LengthOf(matches).Equal(rpy.PyInt(0)).ThenBlock(ifb2)
elif isinstance(pat, pattern.CheckConstraint):
# matches{i} = []
# for m, h, t in matches{i-1}:
# tmp{i} = m.CompareKeys(sym1, sym2)
# if tmp{i} == True:
# tmp{j} = matches{i}.append( (m, h, t) )
# if len(matches{i}) == 0:
# return matches{i}
tmpi, tmpj, tmpk = rpy.gen_pyid_temporaries(3, symgen)
ifb1 = rpy.BlockBuilder()
ifb1.AssignTo(tmpj).MethodCall(matches, 'append', rpy.PyTuple(m, h, t))
forb = rpy.BlockBuilder()
forb.AssignTo(tmpi).MethodCall(m, MatchMethodTable.CompareKeys, rpy.PyString(pat.sym1), rpy.PyString(pat.sym2))
forb.If.Equal(tmpi, rpy.PyBoolean(True)).ThenBlock(ifb1)
ifb2 = rpy.BlockBuilder()
ifb2.Return(matches)
fb.AssignTo(matches).PyList()
fb.For(m, h, t).In(previousmatches).Block(forb)
fb.If.LengthOf(matches).Equal(rpy.PyInt(0)).ThenBlock(ifb2)
else:
# matches{i} = []
# for m, h, t in matches{i-1}:
# tmp{j} = term.get(h)
# tmp{i} = func(tmp{j}, m, h, t)
# matches{i} = matches{i} + tmp{i}
# if len(matches{i}) == 0:
# return matches{i}
function = self.context.get_function_for_pattern(self.languagename, repr(pat))
tmpi, tmpj = rpy.gen_pyid_temporaries(2, symgen)
forb = rpy.BlockBuilder()
forb.AssignTo(tmpj).MethodCall(term, TermMethodTable.Get, h)
forb.AssignTo(tmpi).FunctionCall(function, tmpj, m, h, t)
forb.AssignTo(matches).Add(matches, tmpi)
ifb1 = rpy.BlockBuilder()
ifb1.Return(matches)
fb.AssignTo(matches).PyList()
fb.For(m, h, t).In(previousmatches).Block(forb)
fb.If.LengthOf(matches).Equal(rpy.PyInt(0)).ThenBlock(ifb1)
previousmatches = matches
# exit term
#
# matches{i} = []
# for m, h, t in matches{i-1}:
# if h == t:
# tmp{k} = head + 1
# tmp{i} = (m, head, tail)
# tmp{j} = matches{i}.append(tmp{i})
# return matches{i}
tmpi, tmpj, tmpk = rpy.gen_pyid_temporaries(3, symgen)
matches = rpy.gen_pyid_temporary_with_sym('matches', symgen)
ifb = rpy.BlockBuilder()
ifb.AssignTo(tmpk).Add(head, rpy.PyInt(1))
ifb.AssignTo(tmpi).PyTuple(m, tmpk, tail)
ifb.AssignTo(tmpj).MethodCall(matches, 'append', tmpi)
forb = rpy.BlockBuilder()
forb.If.Equal(h, t).ThenBlock(ifb)
fb.AssignTo(matches).PyList()
fb.For(m, h, t).In(previousmatches).Block(forb)
fb.Return(matches)
self.modulebuilder.SingleLineComment(repr(seq))
self.modulebuilder.Function(match_fn).WithParameters(term, match, head, tail).Block(fb)