js-slang
Version:
Javascript-based implementations of Source, written in Typescript
59 lines • 2.5 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.unparse = void 0;
function unparse(node) {
//if ((node as any)?.hidden) return "";
switch (node.type) {
case "Identifier":
return node.name;
case "Literal":
return node.raw;
case "CallExpression":
const callee = unparse(node.callee);
const args = node.arguments.map(unparse).join(" ");
return `(${callee} ${args})`;
case "ArrayExpression":
const elements = node.elements.map(s => unparse(s)).join(" ");
return `(vector ${elements})`;
case "ArrowFunctionExpression":
const params = node.params.map(unparse).join(" ");
const body = unparse(node.body);
return `(lambda (${params}) ${body})`;
case "RestElement":
return `. ${unparse(node.argument)}`;
case "BlockStatement":
const statements = node.body.map(unparse).join(" ");
return `(begin ${statements})`;
case "ReturnStatement":
const argument = unparse(node.argument);
return argument;
case "VariableDeclaration":
const id = unparse(node.declarations[0].id);
const init = unparse(node.declarations[0].init);
return `(define ${id} ${init})`;
case "ExpressionStatement":
return unparse(node.expression);
case "AssignmentExpression":
const left = unparse(node.left);
const right = unparse(node.right);
return `(set! ${left} ${right})`;
case "ConditionalExpression":
const test = unparse(node.test);
const consequent = unparse(node.consequent);
const alternate = unparse(node.alternate);
return `(if ${test} ${consequent} ${alternate})`;
case "Program":
return node.body.map(unparse).join("\n");
case "ImportDeclaration":
const identifiers = node.specifiers.map(unparse).join(" ");
const source = unparse(node.source);
return `(import (${source} ${identifiers}))`;
case "ExportNamedDeclaration":
const definition = unparse(node.declaration);
return `(export ${definition})`;
default:
throw new Error(`Unparsing for node type ${node.type} not implemented`);
}
}
exports.unparse = unparse;
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