index.js文件
import { A } from './a.js'
function test() {
const tmp = 'something'
return tmp + A
}
const r = test()
通过lib\Parser.js把index.js转换成AST树状结构。
{
type: "Program",
start: 0,
end: 106,
loc: {
start: {
line: 1,
column: 0,
},
end: {
line: 6,
column: 15,
},
},
range: [
0,
106,
],
body: [
{
type: "ImportDeclaration",
start: 0,
end: 27,
loc: {
start: {
line: 1,
column: 0,
},
end: {
line: 1,
column: 27,
},
},
range: [
0,
27,
],
specifiers: [
{
type: "ImportSpecifier",
start: 9,
end: 10,
loc: {
start: {
line: 1,
column: 9,
},
end: {
line: 1,
column: 10,
},
},
range: [
9,
10,
],
imported: {
type: "Identifier",
start: 9,
end: 10,
loc: {
start: {
line: 1,
column: 9,
},
end: {
line: 1,
column: 10,
},
},
range: [
9,
10,
],
name: "A",
},
local: {
type: "Identifier",
start: 9,
end: 10,
loc: {
start: {
line: 1,
column: 9,
},
end: {
line: 1,
column: 10,
},
},
range: [
9,
10,
],
name: "A",
},
},
],
source: {
type: "Literal",
start: 18,
end: 26,
loc: {
start: {
line: 1,
column: 18,
},
end: {
line: 1,
column: 26,
},
},
range: [
18,
26,
],
value: "./a.js",
raw: "'./a.js'",
},
},
{
type: "FunctionDeclaration",
start: 28,
end: 90,
loc: {
start: {
line: 2,
column: 0,
},
end: {
line: 5,
column: 1,
},
},
range: [
28,
90,
],
id: {
type: "Identifier",
start: 37,
end: 41,
loc: {
start: {
line: 2,
column: 9,
},
end: {
line: 2,
column: 13,
},
},
range: [
37,
41,
],
name: "test",
},
generator: false,
expression: false,
async: false,
params: [
],
body: {
type: "BlockStatement",
start: 44,
end: 90,
loc: {
start: {
line: 2,
column: 16,
},
end: {
line: 5,
column: 1,
},
},
range: [
44,
90,
],
body: [
{
type: "VariableDeclaration",
start: 48,
end: 70,
loc: {
start: {
line: 3,
column: 2,
},
end: {
line: 3,
column: 24,
},
},
range: [
48,
70,
],
declarations: [
{
type: "VariableDeclarator",
start: 52,
end: 69,
loc: {
start: {
line: 3,
column: 6,
},
end: {
line: 3,
column: 23,
},
},
range: [
52,
69,
],
id: {
type: "Identifier",
start: 52,
end: 55,
loc: {
start: {
line: 3,
column: 6,
},
end: {
line: 3,
column: 9,
},
},
range: [
52,
55,
],
name: "tmp",
},
init: {
type: "Literal",
start: 58,
end: 69,
loc: {
start: {
line: 3,
column: 12,
},
end: {
line: 3,
column: 23,
},
},
range: [
58,
69,
],
value: "something",
raw: "'something'",
},
},
],
kind: "var",
},
{
type: "ReturnStatement",
start: 73,
end: 88,
loc: {
start: {
line: 4,
column: 2,
},
end: {
line: 4,
column: 17,
},
},
range: [
73,
88,
],
argument: {
type: "BinaryExpression",
start: 80,
end: 87,
loc: {
start: {
line: 4,
column: 9,
},
end: {
line: 4,
column: 16,
},
},
range: [
80,
87,
],
left: {
type: "Identifier",
start: 80,
end: 83,
loc: {
start: {
line: 4,
column: 9,
},
end: {
line: 4,
column: 12,
},
},
range: [
80,
83,
],
name: "tmp",
},
operator: "+",
right: {
type: "Identifier",
start: 86,
end: 87,
loc: {
start: {
line: 4,
column: 15,
},
end: {
line: 4,
column: 16,
},
},
range: [
86,
87,
],
name: "A",
},
},
},
],
},
},
{
type: "VariableDeclaration",
start: 91,
end: 106,
loc: {
start: {
line: 6,
column: 0,
},
end: {
line: 6,
column: 15,
},
},
range: [
91,
106,
],
declarations: [
{
type: "VariableDeclarator",
start: 95,
end: 105,
loc: {
start: {
line: 6,
column: 4,
},
end: {
line: 6,
column: 14,
},
},
range: [
95,
105,
],
id: {
type: "Identifier",
start: 95,
end: 96,
loc: {
start: {
line: 6,
column: 4,
},
end: {
line: 6,
column: 5,
},
},
range: [
95,
96,
],
name: "r",
},
init: {
type: "CallExpression",
start: 99,
end: 105,
loc: {
start: {
line: 6,
column: 8,
},
end: {
line: 6,
column: 14,
},
},
range: [
99,
105,
],
callee: {
type: "Identifier",
start: 99,
end: 103,
loc: {
start: {
line: 6,
column: 8,
},
end: {
line: 6,
column: 12,
},
},
range: [
99,
103,
],
name: "test",
},
arguments: [
],
},
},
],
kind: "var",
},
],
sourceType: "module",
}
树结构如下图所示：
