本文整理匯總了TypeScript中babel-types.isConditionalExpression函數的典型用法代碼示例。如果您正苦於以下問題：TypeScript isConditionalExpression函數的具體用法？TypeScript isConditionalExpression怎麽用？TypeScript isConditionalExpression使用的例子？那麽, 這裏精選的函數代碼示例或許可以為您提供幫助。
在下文中一共展示了isConditionalExpression函數的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: toConstant
function toConstant(expression: b.Expression): any {
if (!constant) return;
if (b.isArrayExpression(expression)) {
const result = [];
for (let i = 0; constant && i < expression.elements.length; i++) {
const element = expression.elements[i];
if (b.isSpreadElement(element)) {
const spread = toConstant(element.argument);
if (!(isSpreadable(spread) && constant)) {
constant = false;
} else {
result.push(...spread);
}
} else {
result.push(toConstant(element));
}
}
return result;
}
if (b.isBinaryExpression(expression)) {
const left = toConstant(expression.left);
const right = toConstant(expression.right);
return constant && binaryOperation(expression.operator, left, right);
}
if (b.isBooleanLiteral(expression)) {
return expression.value;
}
if (b.isCallExpression(expression)) {
const args = [];
for (let i = 0; constant && i < expression.arguments.length; i++) {
const arg = expression.arguments[i];
if (b.isSpreadElement(arg)) {
const spread = toConstant(arg.argument);
if (!(isSpreadable(spread) && constant)) {
constant = false;
} else {
args.push(...spread);
}
} else {
args.push(toConstant(arg));
}
}
if (!constant) return;
if (b.isMemberExpression(expression.callee)) {
const object = toConstant(expression.callee.object);
if (!object || !constant) {
constant = false;
return;
}
const member = expression.callee.computed
? toConstant(expression.callee.property)
: b.isIdentifier(expression.callee.property)
? expression.callee.property.name
: undefined;
if (member === undefined && !expression.callee.computed) {
constant = false;
}
if (!constant) return;
if (canCallMethod(object, '' + member)) {
return object[member].apply(object, args);
}
} else {
const callee = toConstant(expression.callee);
if (!constant) return;
return callee.apply(null, args);
}
}
if (b.isConditionalExpression(expression)) {
const test = toConstant(expression.test);
return test
? toConstant(expression.consequent)
: toConstant(expression.alternate);
}
if (b.isIdentifier(expression)) {
if (
options.constants &&
{}.hasOwnProperty.call(options.constants, expression.name)
) {
return options.constants[expression.name];
}
}
if (b.isLogicalExpression(expression)) {
const left = toConstant(expression.left);
const right = toConstant(expression.right);
if (constant && expression.operator === '&&') {
return left && right;
}
if (constant && expression.operator === '||') {
return left || right;
}
}
if (b.isMemberExpression(expression)) {
const object = toConstant(expression.object);
if (!object || !constant) {
constant = false;
return;
}
const member = expression.computed
? toConstant(expression.property)
: b.isIdentifier(expression.property)
//.........這裏部分代碼省略.........
示例2: parseLoopBody
export function parseLoopBody (
body: NodePath<t.BlockStatement>,
jsxDeclarations: Set<NodePath<t.Node>>,
// @TODO
// 把 templates 換成 Map 可以支持 shalow variables declared
// 現在先用 ESLint 的 no-shalow 頂著
templates: Map<string, t.JSXElement>,
loopScopes: Set<string>,
finalReturnElement: t.JSXElement,
returnedPaths: NodePath<t.Node>[]
) {
const bodyScope = body.scope
body.traverse({
JSXElement (jsxElementPath) {
const parentNode = jsxElementPath.parent
const parentPath = jsxElementPath.parentPath
const isFinalReturn = jsxElementPath.getFunctionParent().isClassMethod()
const isJSXChildren = t.isJSXElement(parentNode)
if (!isJSXChildren) {
let statementParent = jsxElementPath.getStatementParent()
if (
!(
statementParent.isVariableDeclaration() ||
statementParent.isExpressionStatement()
)
) {
statementParent = statementParent.findParent(
s => s.isVariableDeclaration() || s.isExpressionStatement()
) as NodePath<t.Statement>
}
jsxDeclarations.add(statementParent)
if (t.isVariableDeclarator(parentNode)) {
if (statementParent) {
const name = findIdentifierFromStatement(statementParent.node as t.VariableDeclaration)
// setTemplate(name, path, templates)
name && templates.set(name, jsxElementPath.node)
}
} else if (t.isLogicalExpression(parentNode)) {
const { left, operator } = parentNode
if (operator === '&&') {
if (t.isExpression(left)) {
newJSXIfAttr(jsxElementPath.node, left)
parentPath.replaceWith(jsxElementPath.node)
if (statementParent) {
const name = findIdentifierFromStatement(statementParent.node as t.VariableDeclaration)
setTemplate(name, jsxElementPath, templates)
// name && templates.set(name, path.node)
}
}
}
} else if (t.isConditionalExpression(parentNode)) {
const { test, consequent, alternate } = parentNode
const block = buildBlockElement()
if (t.isJSXElement(consequent) && t.isLiteral(alternate)) {
const { value, confident } = parentPath.get('alternate').evaluate()
if (confident && !value) {
newJSXIfAttr(block, test)
block.children = [ jsxElementPath.node ]
// newJSXIfAttr(jsxElementPath.node, test)
parentPath.replaceWith(block)
if (statementParent) {
const name = findIdentifierFromStatement(
statementParent.node as t.VariableDeclaration
)
setTemplate(name, jsxElementPath, templates)
// name && templates.set(name, path.node)
}
}
} else if (t.isLiteral(consequent) && t.isJSXElement(consequent)) {
if (t.isNullLiteral(consequent)) {
newJSXIfAttr(block, reverseBoolean(test))
// newJSXIfAttr(jsxElementPath.node, reverseBoolean(test))
parentPath.replaceWith(block)
if (statementParent) {
const name = findIdentifierFromStatement(
statementParent.node as t.VariableDeclaration
)
setTemplate(name, jsxElementPath, templates)
// name && templates.set(name, path.node)
}
}
} else if (t.isJSXElement(consequent) && t.isJSXElement(alternate)) {
const block2 = buildBlockElement()
block.children = [consequent]
newJSXIfAttr(block, test)
setJSXAttr(block2, Adapter.else)
block2.children = [alternate]
const parentBlock = buildBlockElement()
parentBlock.children = [block, block2]
parentPath.replaceWith(parentBlock)
if (statementParent) {
const name = findIdentifierFromStatement(
statementParent.node as t.VariableDeclaration
)
setTemplate(name, jsxElementPath, templates)
}
} else {
// console.log('todo')
}
} else if (t.isReturnStatement(parentNode)) {
//.........這裏部分代碼省略.........