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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package serial defines the guru's schema for -json output.
//
// The output of a guru query is a stream of one or more JSON objects.
// This table shows the types of objects in the result stream for each
// query type.
//
// Query Result stream
// ----- -------------
// callees Callees
// callers Caller ...
// callstack CallStack
// definition Definition
// describe Describe
// freevars FreeVar ...
// implements Implements
// peers Peers
// pointsto PointsTo ...
// referrers ReferrersInitial ReferrersPackage ...
// what What
// whicherrs WhichErrs
//
// All 'pos' strings in the output are of the form "file:line:col",
// where line is the 1-based line number and col is the 1-based byte index.
package serial
// A Peers is the result of a 'peers' query.
// If Allocs is empty, the selected channel can't point to anything.
type Peers struct {
Pos string `json:"pos"` // location of the selected channel op (<-)
Type string `json:"type"` // type of the selected channel
Allocs []string `json:"allocs,omitempty"` // locations of aliased make(chan) ops
Sends []string `json:"sends,omitempty"` // locations of aliased ch<-x ops
Receives []string `json:"receives,omitempty"` // locations of aliased <-ch ops
Closes []string `json:"closes,omitempty"` // locations of aliased close(ch) ops
}
// A "referrers" query emits a ReferrersInitial object followed by zero or
// more ReferrersPackage objects, one per package that contains a reference.
type (
ReferrersInitial struct {
ObjPos string `json:"objpos,omitempty"` // location of the definition
Desc string `json:"desc"` // description of the denoted object
}
ReferrersPackage struct {
Package string `json:"package"`
Refs []Ref `json:"refs"` // non-empty list of references within this package
}
Ref struct {
Pos string `json:"pos"` // location of all references
Text string `json:"text"` // text of the referring line
}
)
// A Definition is the result of a 'definition' query.
type Definition struct {
ObjPos string `json:"objpos,omitempty"` // location of the definition
Desc string `json:"desc"` // description of the denoted object
}
// A Callees is the result of a 'callees' query.
//
// Callees is nonempty unless the call was a dynamic call on a
// provably nil func or interface value.
type (
Callees struct {
Pos string `json:"pos"` // location of selected call site
Desc string `json:"desc"` // description of call site
Callees []*Callee `json:"callees"`
}
Callee struct {
Name string `json:"name"` // full name of called function
Pos string `json:"pos"` // location of called function
}
)
// A Caller is one element of the slice returned by a 'callers' query.
// (Callstack also contains a similar slice.)
//
// The root of the callgraph has an unspecified "Caller" string.
type Caller struct {
Pos string `json:"pos,omitempty"` // location of the calling function
Desc string `json:"desc"` // description of call site
Caller string `json:"caller"` // full name of calling function
}
// A CallStack is the result of a 'callstack' query.
// It indicates an arbitrary path from the root of the callgraph to
// the query function.
//
// If the Callers slice is empty, the function was unreachable in this
// analysis scope.
type CallStack struct {
Pos string `json:"pos"` // location of the selected function
Target string `json:"target"` // the selected function
Callers []Caller `json:"callers"` // enclosing calls, innermost first.
}
// A FreeVar is one element of the slice returned by a 'freevars'
// query. Each one identifies an expression referencing a local
// identifier defined outside the selected region.
type FreeVar struct {
Pos string `json:"pos"` // location of the identifier's definition
Kind string `json:"kind"` // one of {var,func,type,const,label}
Ref string `json:"ref"` // referring expression (e.g. "x" or "x.y.z")
Type string `json:"type"` // type of the expression
}
// An Implements contains the result of an 'implements' query.
// It describes the queried type, the set of named non-empty interface
// types to which it is assignable, and the set of named/*named types
// (concrete or non-empty interface) which may be assigned to it.
type Implements struct {
T ImplementsType `json:"type,omitempty"` // the queried type
AssignableTo []ImplementsType `json:"to,omitempty"` // types assignable to T
AssignableFrom []ImplementsType `json:"from,omitempty"` // interface types assignable from T
AssignableFromPtr []ImplementsType `json:"fromptr,omitempty"` // interface types assignable only from *T
// The following fields are set only if the query was a method.
// Assignable{To,From,FromPtr}Method[i] is the corresponding
// method of type Assignable{To,From,FromPtr}[i], or blank
// {"",""} if that type lacks the method.
Method *DescribeMethod `json:"method,omitempty"` // the queried method
AssignableToMethod []DescribeMethod `json:"to_method,omitempty"`
AssignableFromMethod []DescribeMethod `json:"from_method,omitempty"`
AssignableFromPtrMethod []DescribeMethod `json:"fromptr_method,omitempty"`
}
// An ImplementsType describes a single type as part of an 'implements' query.
type ImplementsType struct {
Name string `json:"name"` // full name of the type
Pos string `json:"pos"` // location of its definition
Kind string `json:"kind"` // "basic", "array", etc
}
// A SyntaxNode is one element of a stack of enclosing syntax nodes in
// a "what" query.
type SyntaxNode struct {
Description string `json:"desc"` // description of syntax tree
Start int `json:"start"` // start byte offset, 0-based
End int `json:"end"` // end byte offset
}
// A What is the result of the "what" query, which quickly identifies
// the selection, parsing only a single file. It is intended for use
// in low-latency GUIs.
type What struct {
Enclosing []SyntaxNode `json:"enclosing"` // enclosing nodes of syntax tree
Modes []string `json:"modes"` // query modes enabled for this selection.
SrcDir string `json:"srcdir,omitempty"` // $GOROOT src directory containing queried package
ImportPath string `json:"importpath,omitempty"` // import path of queried package
Object string `json:"object,omitempty"` // name of identified object, if any
SameIDs []string `json:"sameids,omitempty"` // locations of references to same object
}
// A PointsToLabel describes a pointer analysis label.
//
// A "label" is an object that may be pointed to by a pointer, map,
// channel, 'func', slice or interface. Labels include:
// - functions
// - globals
// - arrays created by literals (e.g. []byte("foo")) and conversions ([]byte(s))
// - stack- and heap-allocated variables (including composite literals)
// - arrays allocated by append()
// - channels, maps and arrays created by make()
// - and their subelements, e.g. "alloc.y[*].z"
type PointsToLabel struct {
Pos string `json:"pos"` // location of syntax that allocated the object
Desc string `json:"desc"` // description of the label
}
// A PointsTo is one element of the result of a 'pointsto' query on an
// expression. It describes a single pointer: its type and the set of
// "labels" it points to.
//
// If the pointer is of interface type, it will have one PTS entry
// describing each concrete type that it may contain. For each
// concrete type that is a pointer, the PTS entry describes the labels
// it may point to. The same is true for reflect.Values, except the
// dynamic types needn't be concrete.
type PointsTo struct {
Type string `json:"type"` // (concrete) type of the pointer
NamePos string `json:"namepos,omitempty"` // location of type defn, if Named
Labels []PointsToLabel `json:"labels,omitempty"` // pointed-to objects
}
// A DescribeValue is the additional result of a 'describe' query
// if the selection indicates a value or expression.
type DescribeValue struct {
Type string `json:"type"` // type of the expression
Value string `json:"value,omitempty"` // value of the expression, if constant
ObjPos string `json:"objpos,omitempty"` // location of the definition, if an Ident
TypesPos []Definition `json:"typespos,omitempty"` // location of the named types, that type consist of
}
type DescribeMethod struct {
Name string `json:"name"` // method name, as defined by types.Selection.String()
Pos string `json:"pos"` // location of the method's definition
}
// A DescribeType is the additional result of a 'describe' query
// if the selection indicates a type.
type DescribeType struct {
Type string `json:"type"` // the string form of the type
NamePos string `json:"namepos,omitempty"` // location of definition of type, if named
NameDef string `json:"namedef,omitempty"` // underlying definition of type, if named
Methods []DescribeMethod `json:"methods,omitempty"` // methods of the type
}
type DescribeMember struct {
Name string `json:"name"` // name of member
Type string `json:"type,omitempty"` // type of member (underlying, if 'type')
Value string `json:"value,omitempty"` // value of member (if 'const')
Pos string `json:"pos"` // location of definition of member
Kind string `json:"kind"` // one of {var,const,func,type}
Methods []DescribeMethod `json:"methods,omitempty"` // methods (if member is a type)
}
// A DescribePackage is the additional result of a 'describe' if
// the selection indicates a package.
type DescribePackage struct {
Path string `json:"path"` // import path of the package
Members []*DescribeMember `json:"members,omitempty"` // accessible members of the package
}
// A Describe is the result of a 'describe' query.
// It may contain an element describing the selected semantic entity
// in detail.
type Describe struct {
Desc string `json:"desc"` // description of the selected syntax node
Pos string `json:"pos"` // location of the selected syntax node
Detail string `json:"detail,omitempty"` // one of {package, type, value}, or "".
// At most one of the following fields is populated:
// the one specified by 'detail'.
Package *DescribePackage `json:"package,omitempty"`
Type *DescribeType `json:"type,omitempty"`
Value *DescribeValue `json:"value,omitempty"`
}
// A WhichErrs is the result of a 'whicherrs' query.
// It contains the position of the queried error and the possible globals,
// constants, and types it may point to.
type WhichErrs struct {
ErrPos string `json:"errpos,omitempty"` // location of queried error
Globals []string `json:"globals,omitempty"` // locations of globals
Constants []string `json:"constants,omitempty"` // locations of constants
Types []WhichErrsType `json:"types,omitempty"` // Types
}
type WhichErrsType struct {
Type string `json:"type,omitempty"`
Position string `json:"position,omitempty"`
}