Package compiler :: Module pycodegen :: Class CodeGenerator

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Class CodeGenerator

Known Subclasses:

Defines basic code generator for Python bytecode

This class is an abstract base class. Concrete subclasses must define an __init__() that defines self.graph and then calls the __init__() defined in this class.

The concrete class must also define the class attributes NameFinder, FunctionGen, and ClassGen. These attributes can be defined in the initClass() method, which is a hook for initializing these methods after all the classes have been defined.

Nested Classes

NameFinder
Find local names in scope

Instance Methods

__init__(self)

initClass(self)
This method is called once for each class

checkClass(self)
Verify that class is constructed correctly

_setupGraphDelegation(self)

getCode(self)
Return a code object

mangle(self, name)

parseSymbols(self, tree)

get_module(self)

isLocalName(self, name)

storeName(self, name)

loadName(self, name)

delName(self, name)

_nameOp(self, prefix, name)

_implicitNameOp(self, prefix, name)
Emit name ops for names generated implicitly by for loops

set_lineno(self, node, force=False)
Emit SET_LINENO if necessary.

visitModule(self, node)

visitExpression(self, node)

visitFunction(self, node)

visitLambda(self, node)

_visitFuncOrLambda(self, node, isLambda=0)

visitClass(self, node)

visitIf(self, node)

visitWhile(self, node)

visitFor(self, node)

visitBreak(self, node)

visitContinue(self, node)

visitTest(self, node, jump)

visitAnd(self, node)

visitOr(self, node)

visitIfExp(self, node)

visitCompare(self, node)

visitListComp(self, node)

visitListCompFor(self, node)

visitListCompIf(self, node, branch)

_makeClosure(self, gen, args)

visitGenExpr(self, node)

visitGenExprInner(self, node)

visitGenExprFor(self, node)

visitGenExprIf(self, node, branch)

visitAssert(self, node)

visitRaise(self, node)

visitTryExcept(self, node)

visitTryFinally(self, node)

visitWith(self, node)

visitDiscard(self, node)

visitConst(self, node)

visitKeyword(self, node)

visitGlobal(self, node)

visitName(self, node)

visitPass(self, node)

visitImport(self, node)

visitFrom(self, node)

_resolveDots(self, name)

visitGetattr(self, node)

visitAssign(self, node)

visitAssName(self, node)

visitAssAttr(self, node)

_visitAssSequence(self, node, op='UNPACK_SEQUENCE')

visitAssTuple(self, node, op='UNPACK_SEQUENCE')

visitAssList(self, node, op='UNPACK_SEQUENCE')

visitAugAssign(self, node)

visitAugName(self, node, mode)

visitAugGetattr(self, node, mode)

visitAugSlice(self, node, mode)

visitAugSubscript(self, node, mode)

visitExec(self, node)

visitCallFunc(self, node)

visitPrint(self, node, newline=0)

visitPrintnl(self, node)

visitReturn(self, node)

visitYield(self, node)

visitSlice(self, node, aug_flag=None)

visitSubscript(self, node, aug_flag=None)

binaryOp(self, node, op)

visitAdd(self, node)

visitSub(self, node)

visitMul(self, node)

visitDiv(self, node)

visitFloorDiv(self, node)

visitMod(self, node)

visitPower(self, node)

visitLeftShift(self, node)

visitRightShift(self, node)

unaryOp(self, node, op)

visitInvert(self, node)

visitUnarySub(self, node)

visitUnaryAdd(self, node)

visitUnaryInvert(self, node)

visitNot(self, node)

visitBackquote(self, node)

bitOp(self, nodes, op)

visitBitand(self, node)

visitBitor(self, node)

visitBitxor(self, node)

visitEllipsis(self, node)

visitTuple(self, node)

visitList(self, node)

visitSliceobj(self, node)

visitDict(self, node)

Class Variables

optimized = 0

__initialized = None

class_name = None

FunctionGen = None

ClassGen = None

__list_count = 0

__with_count = 0

_augmented_opcode = {'%=': 'INPLACE_MODULO', '&=': 'INPLACE_AN...

Method Details

_implicitNameOp(self, prefix, name)

Emit name ops for names generated implicitly by for loops

The interpreter generates names that start with a period or dollar sign. The symbol table ignores these names because they aren't present in the program text.

set_lineno(self, node, force=False)

Emit SET_LINENO if necessary.

The instruction is considered necessary if the node has a lineno attribute and it is different than the last lineno emitted.

Returns true if SET_LINENO was emitted.

There are no rules for when an AST node should have a lineno attribute. The transformer and AST code need to be reviewed and a consistent policy implemented and documented. Until then, this method works around missing line numbers.

Class Variable Details

_augmented_opcode

Value:

{'%=': 'INPLACE_MODULO',
 '&=': 'INPLACE_AND',
 '**=': 'INPLACE_POWER',
 '*=': 'INPLACE_MULTIPLY',
 '+=': 'INPLACE_ADD',
 '-=': 'INPLACE_SUBTRACT',
 '//=': 'INPLACE_FLOOR_DIVIDE',
 '/=': 'INPLACE_DIVIDE',
...