本文整理汇总了TypeScript中babel-types.isFunctionExpression函数的典型用法代码示例。如果您正苦于以下问题：TypeScript isFunctionExpression函数的具体用法？TypeScript isFunctionExpression怎么用？TypeScript isFunctionExpression使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了isFunctionExpression函数的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1: resetTSClassProperty
export function resetTSClassProperty (body) {
for (const method of body) {
if (t.isClassMethod(method) && method.kind === 'constructor') {
for (const statement of cloneDeep(method.body.body)) {
if (t.isExpressionStatement(statement) && t.isAssignmentExpression(statement.expression)) {
const expr = statement.expression
const { left, right } = expr
if (
t.isMemberExpression(left) &&
t.isThisExpression(left.object) &&
t.isIdentifier(left.property)
) {
if (
(t.isArrowFunctionExpression(right) || t.isFunctionExpression(right)) ||
(left.property.name === 'config' && t.isObjectExpression(right))
) {
body.push(
t.classProperty(left.property, right)
)
remove(method.body.body, statement)
}
}
}
}
}
}
}示例2: findParentLoops
export function findParentLoops (
callee: NodePath<t.CallExpression>,
names: Map<NodePath<t.CallExpression>, string>,
loops: t.ArrayExpression
) {
let indexId: t.Identifier | null = null
let name: string | undefined
const [ func ] = callee.node.arguments
if (t.isFunctionExpression(func) || t.isArrowFunctionExpression(func)) {
const params = func.params as t.Identifier[]
indexId = params[1]
name = names.get(callee)
}
if (indexId === null || !t.isIdentifier(indexId)) {
indexId = t.identifier(callee.scope.generateUid('anonIdx'));
(func as any).params = [(func as any).params[0], indexId]
}
if (!name) {
throw codeFrameError(callee.node, '找不到循环对应的名称')
}
loops.elements.unshift(t.objectExpression([
t.objectProperty(t.identifier('indexId'), indexId),
t.objectProperty(t.identifier('name'), t.stringLiteral(name))
]))
const parentCallExpr = callee.findParent(p => p.isCallExpression())
if (parentCallExpr && parentCallExpr.isCallExpression()) {
const callee = parentCallExpr.node.callee
if (
t.isMemberExpression(callee) &&
t.isIdentifier(callee.property) &&
callee.property.name === 'map'
) {
findParentLoops(parentCallExpr, names, loops)
}
}
}示例3: handleThirdPartyComponent
method.body.body = method.body.body.filter(statement => {
if (t.isExpressionStatement(statement) && t.isAssignmentExpression(statement.expression)) {
const expr = statement.expression
const { left, right } = expr
if (
t.isMemberExpression(left) &&
t.isThisExpression(left.object) &&
t.isIdentifier(left.property)
) {
if (
(t.isArrowFunctionExpression(right) || t.isFunctionExpression(right))
||
(left.property.name === 'config' && t.isObjectExpression(right))
) {
const classProp = t.classProperty(left.property, right)
body.push(classProp)
handleThirdPartyComponent(classProp)
return false
}
}
}
return true
})示例4: parseLoopBody
//.........这里部分代码省略.........
if (caller.isCallExpression()) {
const callee = caller.node.callee
if (
t.isMemberExpression(callee) &&
t.isIdentifier(callee.property) &&
callee.property.name === 'map'
) {
let ary = callee.object
const blockStatementPath = parentPath.findParent(p => p.isBlockStatement()) as NodePath<t.BlockStatement>
const body = blockStatementPath.node.body
let stateToBeAssign = new Set<string>()
for (const statement of body) {
if (t.isVariableDeclaration(statement)) {
for (const dcl of statement.declarations) {
if (t.isIdentifier(dcl.id)) {
const scope = blockStatementPath.scope
const stateName = scope.generateUid(LOOP_STATE)
stateToBeAssign.add(stateName)
blockStatementPath.scope.rename(dcl.id.name, stateName)
}
}
}
}
if (t.isCallExpression(ary) || isContainFunction(caller.get('callee').get('object'))) {
const variableName = `anonymousState_${bodyScope.generateUid()}`
caller.getStatementParent().insertBefore(
buildConstVariableDeclaration(variableName, ary)
)
ary = t.identifier(variableName)
}
setJSXAttr(jsxElementPath.node, Adapter.for, t.jSXExpressionContainer(ary))
const [func] = caller.node.arguments
if (
t.isFunctionExpression(func) ||
t.isArrowFunctionExpression(func)
) {
const [item, index] = func.params
if (t.isIdentifier(item)) {
setJSXAttr(
jsxElementPath.node,
Adapter.forItem,
t.stringLiteral(item.name)
)
loopScopes.add(item.name)
} else {
setJSXAttr(
jsxElementPath.node,
Adapter.forItem,
t.stringLiteral('__item')
)
}
if (t.isIdentifier(index)) {
setJSXAttr(
jsxElementPath.node,
Adapter.forIndex,
t.stringLiteral(index.name)
)
loopScopes.add(index.name)
}
caller.replaceWith(jsxElementPath.node)
if (statementParent) {
const name = findIdentifierFromStatement(
statementParent.node as t.VariableDeclaration
)
// setTemplate(name, path, templates)
name && templates.set(name, jsxElementPath.node)示例5: traverse
// Examples from https://github.com/thejameskyle/babel-handbook/blob/master/translations/en/plugin-handbook.md#babel-types
import traverse from "babel-traverse";
import * as t from "babel-types";
declare const ast: t.Node;
traverse(ast, {
enter(path) {
const node = path.node;
if (t.isIdentifier(node, { name: "n" })) {
node.name = "x";
}
if (t.isFunctionExpression(node)) {
node.params = [t.identifier('param')];
}
}
});
if (t.isBinaryExpression(ast)) {
ast.left;
ast.right;
ast.operator;
}
t.assertBinaryExpression(ast);
t.assertBinaryExpression(ast, { operator: "*" });
const exp: t.Expression = t.nullLiteral();
// React examples:
// https://github.com/babel/babel/blob/4e50b2d9d9c376cee7a2cbf56553fe5b982ea53c/packages/babel-plugin-transform-react-inline-elements/src/index.js#L61示例6: codeFrameError
classBody = properties.map(prop => {
const key = prop.get('key')
const value = prop.get('value')
let params = prop.isObjectMethod()
? prop.node.params
: value.isFunctionExpression() || value.isArrowFunctionExpression()
? value.node.params
: []
const isAsync = prop.isObjectMethod()
? prop.node.async
: value.isFunctionExpression() || value.isArrowFunctionExpression()
? value.node.async
: false
if (!key.isIdentifier()) {
throw codeFrameError(key.node, 'Page 对象的键值只能是字符串')
}
const name = key.node.name
const currentStateKeys: string[] = []
if (name === 'data') {
if (value.isObjectExpression()) {
value
.get('properties')
.map(p => p.node)
.forEach(prop => {
if (t.isObjectProperty(prop)) {
let propKey = ''
if (t.isStringLiteral(prop.key)) {
propKey = prop.key.value
}
if (t.isIdentifier(prop.key)) {
propKey = prop.key.name
}
if (!isValidVarName(propKey)) {
throw codeFrameError(prop, `${propKey} 不是一个合法的 JavaScript 变量名`)
}
if (propKey) {
currentStateKeys.push(propKey)
}
}
})
}
return t.classProperty(t.identifier('state'), value.node)
}
if (name === 'properties') {
const observeProps: { name: string, observer: any }[] = []
if (value.isObjectExpression()) {
value
.get('properties')
.map(p => p.node)
.forEach(prop => {
if (t.isObjectProperty(prop)) {
let propKey: string | null = null
if (t.isStringLiteral(prop.key)) {
propKey = prop.key.value
}
if (t.isIdentifier(prop.key)) {
propKey = prop.key.name
// propsKeys.push(prop.key.name)
}
if (t.isObjectExpression(prop.value) && propKey) {
for (const p of prop.value.properties) {
if (t.isObjectProperty(p)) {
let key: string | null = null
if (t.isStringLiteral(p.key)) {
key = p.key.value
}
if (t.isIdentifier(p.key)) {
key = p.key.name
}
if (key === 'value') {
defaultProps.push({
name: propKey,
value: p.value
})
} else if (key === 'observer') {
observeProps.push({
name: propKey,
observer: p.value
})
}
if (!isValidVarName(propKey)) {
throw codeFrameError(prop, `${propKey} 不是一个合法的 JavaScript 变量名`)
}
}
if (t.isObjectMethod(p) && t.isIdentifier(p.key, { name: 'observer' })) {
observeProps.push({
name: propKey,
observer: t.arrowFunctionExpression(p.params, p.body, p.async)
})
}
}
}
if (propKey) {
propsKeys.push(propKey)
}
}
})
}
//.........这里部分代码省略.........