node_modules/@typescript-eslint/type-utils/dist/getContextualType.js

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.getContextualType = void 0;
const tsutils_1 = require("tsutils");
const ts = __importStar(require("typescript"));
/**
 * Returns the contextual type of a given node.
 * Contextual type is the type of the target the node is going into.
 * i.e. the type of a called function's parameter, or the defined type of a variable declaration
 */
function getContextualType(checker, node) {
    const parent = node.parent;
    if (!parent) {
        return;
    }
    if ((0, tsutils_1.isCallExpression)(parent) || (0, tsutils_1.isNewExpression)(parent)) {
        if (node === parent.expression) {
            // is the callee, so has no contextual type
            return;
        }
    }
    else if ((0, tsutils_1.isVariableDeclaration)(parent) ||
        (0, tsutils_1.isPropertyDeclaration)(parent) ||
        (0, tsutils_1.isParameterDeclaration)(parent)) {
        return parent.type ? checker.getTypeFromTypeNode(parent.type) : undefined;
    }
    else if ((0, tsutils_1.isJsxExpression)(parent)) {
        return checker.getContextualType(parent);
    }
    else if ((0, tsutils_1.isPropertyAssignment)(parent) && (0, tsutils_1.isIdentifier)(node)) {
        return checker.getContextualType(node);
    }
    else if ((0, tsutils_1.isBinaryExpression)(parent) &&
        parent.operatorToken.kind === ts.SyntaxKind.EqualsToken &&
        parent.right === node) {
        // is RHS of assignment
        return checker.getTypeAtLocation(parent.left);
    }
    else if (![ts.SyntaxKind.TemplateSpan, ts.SyntaxKind.JsxExpression].includes(parent.kind)) {
        // parent is not something we know we can get the contextual type of
        return;
    }
    // TODO - support return statement checking
    return checker.getContextualType(node);
}
exports.getContextualType = getContextualType;
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