roblox-ts/out/compiler/try.js

<div align="center"><img width=25% src="https://i.imgur.com/yCjHmng.png"></div> <h1 align="center"><a href="https://roblox-ts.github.io/">roblox-ts</a></h1> <div align="center">A TypeScript-to-Lua Compiler for Roblox</div> <br> <div align="center"> <a hr

"use strict";
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
    result["default"] = mod;
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const ts = __importStar(require("ts-morph"));
const _1 = require(".");
const CompilerError_1 = require("../errors/CompilerError");
const typeUtilities_1 = require("../typeUtilities");
const utility_1 = require("../utility");
function compileThrowStatement(state, node) {
    const expression = utility_1.skipNodesDownwards(node.getExpression());
    if (!expression || !typeUtilities_1.isStringType(typeUtilities_1.getType(expression))) {
        throw new CompilerError_1.CompilerError("Non-string throws are not supported!", node, CompilerError_1.CompilerErrorType.NonStringThrow);
    }
    state.enterPrecedingStatementContext();
    const err = _1.compileExpression(state, expression);
    return state.exitPrecedingStatementContextAndJoin() + state.indent + `error(${err});\n`;
}
exports.compileThrowStatement = compileThrowStatement;
function compileTryStatement(state, node) {
    const tryBlock = node.getTryBlock();
    const returnStatement = tryBlock
        .getDescendantStatements()
        .find(statement => ts.TypeGuards.isReturnStatement(statement));
    if (returnStatement) {
        throw new CompilerError_1.CompilerError("Try blocks cannot have return statements!", returnStatement, CompilerError_1.CompilerErrorType.TryReturn);
    }
    let result = "";
    let hasErrVar = false;
    const catchClause = node.getCatchClause();
    if (catchClause) {
        hasErrVar = catchClause.getVariableDeclaration() !== undefined;
    }
    const successId = catchClause ? state.getNewId() : "";
    const errMsgId = catchClause ? state.getNewId() : "";
    result += state.indent;
    if (catchClause) {
        if (hasErrVar) {
            result += `local ${successId}, ${errMsgId}`;
        }
        else {
            result += `local ${successId}`;
        }
        result += ` = `;
    }
    result += `pcall(function()\n`;
    state.pushIndent();
    result += _1.compileStatementedNode(state, tryBlock);
    state.popIndent();
    result += state.indent + `end);\n`;
    if (catchClause) {
        result += state.indent + `if not ${successId} then\n`;
        state.pushIndent();
        if (hasErrVar) {
            result += state.indent + `local ${catchClause.getVariableDeclarationOrThrow().getName()} = ${errMsgId};\n`;
        }
        result += _1.compileStatementedNode(state, catchClause.getBlock());
        state.popIndent();
        result += state.indent + `end;\n`;
    }
    const finallyBlock = node.getFinallyBlock();
    if (finallyBlock) {
        result += state.indent + `do\n`;
        state.pushIndent();
        result += _1.compileStatementedNode(state, finallyBlock);
        state.popIndent();
        result += state.indent + `end;\n`;
    }
    return result;
}
exports.compileTryStatement = compileTryStatement;
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