Module DataFlowUtil

Provides Go-specific definitions for use in the data flow library.

Import path

import semmle.go.dataflow.internal.DataFlowUtil

Nodes intended for use outside the data-flow libraries.

exprNode	Gets the `Node` corresponding to `e`.
extractTupleElement	Gets the data-flow node corresponding to the `i`th element of tuple `t` (which is either a call with multiple results, an iterator in a range loop, or the result of a type assertion).
getUniqueOutputNode
instructionNode	Gets the `Node` corresponding to `insn`.
isReturnedWithError	Holds if `node` refers to a value returned alongside a non-nil error value.
localFlow	Holds if data flows from `source` to `sink` in zero or more local (intra-procedural) steps.
localFlowStep	Holds if data flows from `nodeFrom` to `nodeTo` in exactly one local (intra-procedural) step.
parameterNode	Gets the `Node` corresponding to the value of `p` at function entry.
possiblyReturnsBool	Holds if `ret` is a data-flow node whose value contributes to the output `res` of `fd`, and that node may have Boolean value `b`.
possiblyReturnsNonNil	Holds if `ret` is a data-flow node whose value contributes to the output `res` of `fd`, and that node may evaluate to a value other than `nil`.
readsAnElement	Holds if `node` reads an element from `base`, either via an element-read (`base[y]`) expression or via a range statement `_, node := range base`.
receiverNode	Gets the `Node` corresponding to the value of `r` at function entry.
simpleLocalFlowStep	INTERNAL: do not use.
ssaNode	Gets the data-flow node corresponding to SSA variable `v`.

ArrayContent	A reference through an array.
CollectionContent	A reference through the contents of some collection-like container.
Content	A reference contained in an object. Examples include instance fields, the contents of a collection object, the contents of an array or pointer.
ContentSet	An entity that represents a set of `Content`s.
FieldContent	A reference through a field.
FunctionModel	A model of a function specifying that the function copies input values from a parameter or qualifier to a result.
MapKeyContent	A reference through a map key.
MapValueContent	A reference through a map value.
PointerContent	A reference through a pointer.
SyntheticFieldContent

Provides a set of barrier nodes for a guard that validates an expression.

Holds if the guard g validates the expression e upon evaluating to branch.