QGIS/resources/function_help/json/eval

{
  "name": "eval",
  "type": "function",
  "groups": ["General"],
  "description": "Evaluates an expression which is passed in a string. Useful to expand dynamic parameters passed as context variables or fields.",
  "arguments": [{
    "arg": "expression",
    "description": "an expression string"
  }],
  "examples": [{
    "expression": "eval('\\\\'nice\\\\'')",
    "returns": "'nice'"
  }, {
    "expression": "eval(@expression_var)",
    "returns": "[whatever the result of evaluating @expression_var might be\u2026]"
  }],
  "tags": ["dynamic", "fields", "parameters", "expression", "expand", "context", "passed", "variables", "evaluates"]
}