trace.cjs•1.74 kB
'use strict';
function getTrace(node) {
function shouldPutToTrace(syntax) {
if (syntax === null) {
return false;
}
return (
syntax.type === 'Type' ||
syntax.type === 'Property' ||
syntax.type === 'Keyword'
);
}
function hasMatch(matchNode) {
if (Array.isArray(matchNode.match)) {
// use for-loop for better perfomance
for (let i = 0; i < matchNode.match.length; i++) {
if (hasMatch(matchNode.match[i])) {
if (shouldPutToTrace(matchNode.syntax)) {
result.unshift(matchNode.syntax);
}
return true;
}
}
} else if (matchNode.node === node) {
result = shouldPutToTrace(matchNode.syntax)
? [matchNode.syntax]
: [];
return true;
}
return false;
}
let result = null;
if (this.matched !== null) {
hasMatch(this.matched);
}
return result;
}
function isType(node, type) {
return testNode(this, node, match => match.type === 'Type' && match.name === type);
}
function isProperty(node, property) {
return testNode(this, node, match => match.type === 'Property' && match.name === property);
}
function isKeyword(node) {
return testNode(this, node, match => match.type === 'Keyword');
}
function testNode(match, node, fn) {
const trace = getTrace.call(match, node);
if (trace === null) {
return false;
}
return trace.some(fn);
}
exports.getTrace = getTrace;
exports.isKeyword = isKeyword;
exports.isProperty = isProperty;
exports.isType = isType;