--- source: parser/ast_tree_test.rs expression: let a = 3 --- { "Program": { "type": "Program", "body": [ { "type": "Let", "identifier": { "kind": { "type": "IDENTIFIER", "value": { "name": "a" } }, "span": { "start": 4, "end": 5 } }, "expr": { "type": "Integer", "raw": 3, "span": { "start": 8, "end": 9 } }, "span": { "start": 0, "end": 9 } } ], "span": { "start": 0, "end": 10 } } }