modelscript/packages/language/src/codegen/wit.ts at main · modelscript/modelscript · GitHub

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import { LanguageOptions } from "../dsl.js";

export function generateWit(grammarDef: LanguageOptions, normalized?: any): string {

const packageName = grammarDef.targets?.wit?.package || `modelscript:${grammarDef.name || "parser"}`;

const worldName = grammarDef.targets?.wit?.world || "language-runner";

let code = `// Wasm Interface Type (WIT) IDL for ${packageName}\n`;

code += `package ${packageName};\n\n`;

code += `world ${worldName} {\n`;

code += ` export parse: func(source: string) -> u32;\n`;

code += ` export get-node-first-child: func(node: u32) -> u32;\n`;

code += ` export get-node-next-sibling: func(node: u32) -> u32;\n`;

code += ` export get-node-type: func(node: u32) -> u32;\n`;

code += ` export get-node-start: func(node: u32) -> u32;\n`;

code += ` export get-node-end: func(node: u32) -> u32;\n`;

code += ` export emit-ast: func(root-instance: u32) -> u32;\n`;

code += ` export clone-node-shadowed: func(ast-ptr: u32, instance-ctx: u32) -> u32;\n`;

if (grammarDef.model) {

for (const [modelName, fields] of Object.entries(grammarDef.model)) {

if (!fields) continue;

const modelFields = fields as Record<string, any>;

for (const fieldName of Object.keys(modelFields)) {

const kebabModelName = modelName.replace(/([a-z0-9])([A-Z])/g, "$1-$2").toLowerCase();

const kebabFieldName = fieldName.replace(/([a-z0-9])([A-Z])/g, "$1-$2").toLowerCase();

code += ` export get-${kebabModelName}-${kebabFieldName}: func(node: u32) -> u32;\n`;

}

code += `}\n`;

return code;

}

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