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[feat] let user execute ast instead of string #76

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[feat] let user execute ast instead of string #76

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b916de7
Fix comparison with single "=" by throwing a better error message.
np42 Mar 20, 2017
2c1ed0b
Fix on requesting data stored in Native named objects (e.g. Error, Da…
np42 Mar 20, 2017
a9c465c
chore(exec): add method to execute ast based query
np42 Mar 27, 2021
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21 changes: 20 additions & 1 deletion jmespath.js
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,13 @@
}
}

function isTraversable(obj) {
if (obj == null) return false;
var type = typeof obj;
if (type != 'function' && type != 'object') return false;
return true;
}

function strictDeepEqual(first, second) {
// Check the scalar case first.
if (first === second) {
Expand Down Expand Up @@ -402,6 +409,10 @@
if (stream[this._current] === "=") {
this._current++;
return {type: TOK_EQ, value: "==", start: start};
} else {
var error = new Error("Unexpected token: do you mean `==' operator ?");
error.name = "ParserError";
throw error;
}
}
},
Expand Down Expand Up @@ -868,7 +879,7 @@
case "Field":
if (value === null ) {
return null;
} else if (isObject(value)) {
} else if (isTraversable(value)) {
field = value[node.name];
if (field === undefined) {
return null;
Expand Down Expand Up @@ -1660,6 +1671,14 @@
return interpreter.search(node, data);
}

function exec(ast, data) {
var runtime = new Runtime();
var interpreter = new TreeInterpreter(runtime);
runtime._interpreter = interpreter;
return interpreter.visit(ast, data);
}

exports.exec = exec;
exports.tokenize = tokenize;
exports.compile = compile;
exports.search = search;
Expand Down