说明
typescript tsutils/util isassignmentkind示例是从最受好评的开源项目中提取的实现代码,你可以参考下面示例的使用方式。
编程语言: TypeScript
命名空间/包名称: tsutils/util
示例#1
文件:
noArrayMutationRule.ts
项目:
jonaskello/tslint-immutable
/**
* No assignment with array[index] on the left.
* No assignment with array.property on the left (e.g. array.length).
*/
function checkBinaryExpression(
node: ts.BinaryExpression,
ctx: Lint.WalkContext<Options>,
checker: ts.TypeChecker
): CheckNodeResult {
if (
!Ignore.isIgnoredPrefix(
node.getText(node.getSourceFile()),
ctx.options.ignorePrefix
) &&
isAssignmentKind(node.operatorToken.kind) &&
isAccessExpression(node.left)
) {
const leftExpressionType = checker.getTypeAtLocation(
getRootAccessExpression(node.left).expression
);
if (isArrayType(leftExpressionType)) {
return { invalidNodes: [createInvalidNode(node, [])] };
}
}
return { invalidNodes: [] };
}
示例#2
文件:
noObjectMutationRule.ts
项目:
jonaskello/tslint-immutable
function checkNode(
node: ts.Node,
ctx: Lint.WalkContext<Options>,
checker: ts.TypeChecker
): CheckNodeResult {
let invalidNodes: Array<InvalidNode> = [];
// No assignment with object.property on the left
if (
utils.isBinaryExpression(node) &&
isAccessExpression(node.left) &&
utils.isBinaryExpression(node) &&
isAssignmentKind(node.operatorToken.kind) &&
!Ignore.isIgnoredPrefix(
node.getText(node.getSourceFile()),
ctx.options.ignorePrefix
) &&
!inConstructor(node)
) {
invalidNodes = [...invalidNodes, createInvalidNode(node, [])];
}
// No deleting object properties
if (
utils.isDeleteExpression(node) &&
isAccessExpression(node.expression) &&
!Ignore.isIgnoredPrefix(
node.expression.getText(node.getSourceFile()),
ctx.options.ignorePrefix
)
) {
invalidNodes = [...invalidNodes, createInvalidNode(node, [])];
}
// No prefix inc/dec
if (
utils.isPrefixUnaryExpression(node) &&
isAccessExpression(node.operand) &&
forbidUnaryOps.some(o => o === node.operator) &&
!Ignore.isIgnoredPrefix(
node.operand.getText(node.getSourceFile()),
ctx.options.ignorePrefix
)
) {
invalidNodes = [...invalidNodes, createInvalidNode(node, [])];
}
// No postfix inc/dec
if (
utils.isPostfixUnaryExpression(node) &&
isAccessExpression(node.operand) &&
forbidUnaryOps.some(o => o === node.operator) &&
!Ignore.isIgnoredPrefix(
node.getText(node.getSourceFile()),
ctx.options.ignorePrefix
)
) {
invalidNodes = [...invalidNodes, createInvalidNode(node, [])];
}
// No Object.assign on identifiers.
if (
utils.isCallExpression(node) &&
utils.isPropertyAccessExpression(node.expression) &&
utils.isIdentifier(node.expression.name) &&
node.expression.name.text === "assign" &&
node.arguments.length >= 2 &&
(utils.isIdentifier(node.arguments[0]) ||
utils.isPropertyAccessExpression(node.arguments[0])) &&
!Ignore.isIgnoredPrefix(
node.arguments[0].getText(node.arguments[0].getSourceFile()),
ctx.options.ignorePrefix
) &&
// Do type checking as late as possible as it is expensive.
isObjectConstructorType(
checker.getTypeAtLocation(node.expression.expression)
)
) {
invalidNodes = [...invalidNodes, createInvalidNode(node, [])];
}
return { invalidNodes };
}