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fix nested environment scopes + highlight runtime errors in editor

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This commit is contained in:
Joeri Exelmans 2025-10-27 10:37:42 +01:00
parent 56467e5ea5
commit a81fe1e884
9 changed files with 77 additions and 43 deletions
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16
src/statecharts/actionlang_interpreter.ts
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@ -1,5 +1,6 @@
// Just a simple recursive interpreter for the action language
import { RuntimeError } from "./interpreter";
import { Expression } from "./label_ast";
import { Environment } from "./runtime_types";
@ -22,7 +23,8 @@ const BINARY_OPERATOR_MAP: Map<string, (a: any, b: any) => any> = new Map([
["%", (a, b) => a % b],
]);
export function evalExpr(expr: Expression, environment: Environment): any {
// parameter uids: list of UIDs to append to any raised errors
export function evalExpr(expr: Expression, environment: Environment, uids: string[] = []): any {
if (expr.kind === "literal") {
return expr.value;
}
@ -30,22 +32,22 @@ export function evalExpr(expr: Expression, environment: Environment): any {
const found = environment.get(expr.variable);
if (found === undefined) {
console.log({environment});
throw new Error(`variable '${expr.variable}' does not exist in environment`);
throw new RuntimeError(`variable '${expr.variable}' does not exist in environment`, uids);
}
return found;
}
else if (expr.kind === "unaryExpr") {
const arg = evalExpr(expr.expr, environment);
const arg = evalExpr(expr.expr, environment, uids);
return UNARY_OPERATOR_MAP.get(expr.operator)!(arg);
}
else if (expr.kind === "binaryExpr") {
const lhs = evalExpr(expr.lhs, environment);
const rhs = evalExpr(expr.rhs, environment);
const lhs = evalExpr(expr.lhs, environment, uids);
const rhs = evalExpr(expr.rhs, environment, uids);
return BINARY_OPERATOR_MAP.get(expr.operator)!(lhs, rhs);
}
else if (expr.kind === "call") {
const fn = evalExpr(expr.fn, environment);
const param = evalExpr(expr.param, environment);
const fn = evalExpr(expr.fn, environment, uids);
const param = evalExpr(expr.param, environment, uids);
return fn(param);
}
throw new Error("should never reach here");