50 lines
1.8 KiB
Markdown
50 lines
1.8 KiB
Markdown
@protobufjs/codegen
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===================
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[](https://www.npmjs.com/package/@protobufjs/codegen)
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A minimalistic code generation utility.
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API
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---
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* **codegen([functionParams: `string[]`], [functionName: string]): `Codegen`**<br />
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Begins generating a function.
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* **codegen.verbose = `false`**<br />
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When set to true, codegen will log generated code to console. Useful for debugging.
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Invoking **codegen** returns an appender function that appends code to the function's body and returns itself:
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* **Codegen(formatString: `string`, [...formatParams: `any`]): Codegen**<br />
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Appends code to the function's body. The format string can contain placeholders specifying the types of inserted format parameters:
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* `%d`: Number (integer or floating point value)
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* `%f`: Floating point value
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* `%i`: Integer value
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* `%j`: JSON.stringify'ed value
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* `%s`: String value
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* `%%`: Percent sign<br />
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* **Codegen([scope: `Object.<string,*>`]): `Function`**<br />
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Finishes the function and returns it.
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* **Codegen.toString([functionNameOverride: `string`]): `string`**<br />
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Returns the function as a string.
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Example
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-------
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```js
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var codegen = require("@protobufjs/codegen");
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var add = codegen(["a", "b"], "add") // A function with parameters "a" and "b" named "add"
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("// awesome comment") // adds the line to the function's body
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("return a + b - c + %d", 1) // replaces %d with 1 and adds the line to the body
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({ c: 1 }); // adds "c" with a value of 1 to the function's scope
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console.log(add.toString()); // function add(a, b) { return a + b - c + 1 }
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console.log(add(1, 2)); // calculates 1 + 2 - 1 + 1 = 3
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```
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**License:** [BSD 3-Clause License](https://opensource.org/licenses/BSD-3-Clause)
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