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add support for Lambda nodes

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change resolution of local name ops (LOAD_FAST).  i think it makes
sense now.  if it is an argument or a local var name that it used, it
must be in varnames.  if it is a local var name that is used, it must
also be in names
This commit is contained in:
Jeremy Hylton 2000-02-11 20:27:07 +00:00
parent 5de8cee73f
commit 76d01b820c
2 changed files with 56 additions and 16 deletions
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36
Lib/compiler/pycodegen.py
View File

@ -167,8 +167,7 @@ class CodeGenerator:
self.curStack = 0
self.maxStack = 0
def generateFunctionCode(self, func, filename='<?>'):
"""Generate code for a function body"""
def _generateFunctionOrLambdaCode(self, func, filename):
self.name = func.name
self.filename = filename
args = func.argnames
@ -183,9 +182,17 @@ class CodeGenerator:
self.locals.push(lnf.getLocals())
self.code.setLineNo(func.lineno)
walk(func.code, self)
def generateFunctionCode(self, func, filename='<?>'):
"""Generate code for a function body"""
self._generateFunctionOrLambdaCode(func, filename)
self.code.emit('LOAD_CONST', None)
self.code.emit('RETURN_VALUE')
def generateLambdaCode(self, func, filename='<?>'):
self._generateFunctionOrLambdaCode(func, filename)
self.code.emit('RETURN_VALUE')
def emit(self):
"""Create a Python code object
@ -267,17 +274,28 @@ class CodeGenerator:
self.code.emit('IMPORT_FROM', name)
self.code.emit('POP_TOP')
def visitFunction(self, node):
def _visitFuncOrLambda(self, node, kind):
"""Code common to Function and Lambda nodes"""
codeBody = CodeGenerator()
codeBody.generateFunctionCode(node, filename=self.filename)
meth = getattr(codeBody, 'generate%sCode' % kind)
meth(node, filename=self.filename)
self.code.setLineNo(node.lineno)
for default in node.defaults:
self.visit(default)
self.code.emit('LOAD_CONST', codeBody)
self.code.emit('MAKE_FUNCTION', len(node.defaults))
def visitFunction(self, node):
self._visitFuncOrLambda(node, 'Function')
self.storeName(node.name)
return 1
def visitLambda(self, node):
node.name = '<lambda>'
node.varargs = node.kwargs = None
self._visitFuncOrLambda(node, 'Lambda')
return 1
def visitCallFunc(self, node):
if hasattr(node, 'lineno'):
self.code.emit('SET_LINENO', node.lineno)
@ -649,6 +667,9 @@ class LocalNameFinder:
self.names.add(node.name)
return 1
def visitLambda(self, node):
return 1
def visitImport(self, node):
for name in node.names:
self.names.add(name)
@ -878,10 +899,9 @@ class PythonVMCode:
if op == 'LOAD_CONST':
return self._lookupName(arg, self.consts)
if op in self.localOps:
if arg in self.names:
return self._lookupName(arg, self.varnames)
else:
return self._lookupName(arg, self.varnames, self.names)
# make sure it's in self.names, but use the bytecode offset
self._lookupName(arg, self.names)
return self._lookupName(arg, self.varnames)
if op in self.globalOps:
return self._lookupName(arg, self.names)
if op in self.nameOps:

36
Tools/compiler/compiler/pycodegen.py
View File

@ -167,8 +167,7 @@ class CodeGenerator:
self.curStack = 0
self.maxStack = 0
def generateFunctionCode(self, func, filename='<?>'):
"""Generate code for a function body"""
def _generateFunctionOrLambdaCode(self, func, filename):
self.name = func.name
self.filename = filename
args = func.argnames
@ -183,9 +182,17 @@ class CodeGenerator:
self.locals.push(lnf.getLocals())
self.code.setLineNo(func.lineno)
walk(func.code, self)
def generateFunctionCode(self, func, filename='<?>'):
"""Generate code for a function body"""
self._generateFunctionOrLambdaCode(func, filename)
self.code.emit('LOAD_CONST', None)
self.code.emit('RETURN_VALUE')
def generateLambdaCode(self, func, filename='<?>'):
self._generateFunctionOrLambdaCode(func, filename)
self.code.emit('RETURN_VALUE')
def emit(self):
"""Create a Python code object
@ -267,17 +274,28 @@ class CodeGenerator:
self.code.emit('IMPORT_FROM', name)
self.code.emit('POP_TOP')
def visitFunction(self, node):
def _visitFuncOrLambda(self, node, kind):
"""Code common to Function and Lambda nodes"""
codeBody = CodeGenerator()
codeBody.generateFunctionCode(node, filename=self.filename)
meth = getattr(codeBody, 'generate%sCode' % kind)
meth(node, filename=self.filename)
self.code.setLineNo(node.lineno)
for default in node.defaults:
self.visit(default)
self.code.emit('LOAD_CONST', codeBody)
self.code.emit('MAKE_FUNCTION', len(node.defaults))
def visitFunction(self, node):
self._visitFuncOrLambda(node, 'Function')
self.storeName(node.name)
return 1
def visitLambda(self, node):
node.name = '<lambda>'
node.varargs = node.kwargs = None
self._visitFuncOrLambda(node, 'Lambda')
return 1
def visitCallFunc(self, node):
if hasattr(node, 'lineno'):
self.code.emit('SET_LINENO', node.lineno)
@ -649,6 +667,9 @@ class LocalNameFinder:
self.names.add(node.name)
return 1
def visitLambda(self, node):
return 1
def visitImport(self, node):
for name in node.names:
self.names.add(name)
@ -878,10 +899,9 @@ class PythonVMCode:
if op == 'LOAD_CONST':
return self._lookupName(arg, self.consts)
if op in self.localOps:
if arg in self.names:
return self._lookupName(arg, self.varnames)
else:
return self._lookupName(arg, self.varnames, self.names)
# make sure it's in self.names, but use the bytecode offset
self._lookupName(arg, self.names)
return self._lookupName(arg, self.varnames)
if op in self.globalOps:
return self._lookupName(arg, self.names)
if op in self.nameOps: