You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
2.0 KiB
55 lines
2.0 KiB
const SolExplore = require('sol-explore');
|
|
const SolidityParser = require('solidity-parser');
|
|
|
|
/**
|
|
* Splices enclosing brackets into `contract` around `expression`;
|
|
* @param {String} contract solidity code
|
|
* @param {Object} node AST node to bracket
|
|
* @return {String} contract
|
|
*/
|
|
function blockWrap(contract, expression) {
|
|
return contract.slice(0, expression.start) + '{' + contract.slice(expression.start, expression.end) + '}' + contract.slice(expression.end);
|
|
}
|
|
|
|
/**
|
|
* Locates unbracketed singleton statements attached to if, else, for and while statements
|
|
* and brackets them. Instrumenter needs to inject events at these locations and having
|
|
* them pre-bracketed simplifies the process. Each time a modification is made the contract
|
|
* is passed back to the parser and re-walked because all the starts and ends get shifted.
|
|
* @param {String} contract solidity code
|
|
* @return {String} contract
|
|
*/
|
|
module.exports.run = function r(contract) {
|
|
let keepRunning = true;
|
|
|
|
while (keepRunning) {
|
|
const ast = SolidityParser.parse(contract);
|
|
keepRunning = false;
|
|
SolExplore.traverse(ast, {
|
|
enter(node, parent) { // eslint-disable-line no-loop-func
|
|
// If consequents
|
|
if (node.type === 'IfStatement' && node.consequent.type !== 'BlockStatement') {
|
|
contract = blockWrap(contract, node.consequent);
|
|
keepRunning = true;
|
|
this.stopTraversal();
|
|
// If alternates
|
|
} else if (
|
|
node.type === 'IfStatement' &&
|
|
node.alternate &&
|
|
node.alternate.type !== 'BlockStatement') {
|
|
contract = blockWrap(contract, node.alternate);
|
|
keepRunning = true;
|
|
this.stopTraversal();
|
|
// Loops
|
|
} else if (
|
|
(node.type === 'ForStatement' || node.type === 'WhileStatement') &&
|
|
node.body.type !== 'BlockStatement') {
|
|
contract = blockWrap(contract, node.body);
|
|
keepRunning = true;
|
|
this.stopTraversal();
|
|
}
|
|
},
|
|
});
|
|
}
|
|
return contract;
|
|
};
|
|
|