78 lines
2.4 KiB
Java
78 lines
2.4 KiB
Java
package carpet.script.exception;
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import carpet.script.Context;
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import carpet.script.Expression;
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import carpet.script.Fluff;
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import carpet.script.Tokenizer;
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import carpet.script.value.FunctionValue;
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import java.util.ArrayList;
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import java.util.List;
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import static carpet.script.ExpressionInspector.Expression_getExpressionSnippet;
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import static carpet.script.ExpressionInspector.Expression_getName;
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/* The expression evaluators exception class. */
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public class ExpressionException extends RuntimeException
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{
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public Context context;
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public List<FunctionValue> stack = new ArrayList<>();
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public ExpressionException(Context c, String message)
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{
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super(makeMessage(c, null, null, message));
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context = c;
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}
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public ExpressionException(Context c, Expression e, Tokenizer.Token t, String message)
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{
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super(makeMessage(c, e, t, message));
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context = c;
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}
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public ExpressionException(Context c, Expression e, Tokenizer.Token t, String message, List<FunctionValue> stack)
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{
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super(makeMessage(c, e, t, message));
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this.stack.addAll(stack);
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context = c;
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}
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private static Fluff.TriFunction<Expression, Tokenizer.Token, String, List<String>> errorMaker = (expr, token, errmessage) ->
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{
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List<String> errMsg = new ArrayList<>();
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if (expr != null && token != null)
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{
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List<String> snippet = Expression_getExpressionSnippet(token, expr);
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errMsg.addAll(snippet);
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if (snippet.size() != 1)
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{
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errmessage += " at line " + (token.lineno + 1) + ", pos " + (token.linepos + 1);
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}
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else
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{
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errmessage += " at pos " + (token.pos + 1);
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}
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if (Expression_getName(expr) != null)
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{
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errmessage += " (" + Expression_getName(expr) + ")";
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}
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}
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errMsg.add(errmessage);
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return errMsg;
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};
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static String makeMessage(Context c, Expression e, Tokenizer.Token t, String message) throws ExpressionException
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{
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if (c.host.errorSnooper != null)
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{
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List<String> alternative = c.host.errorSnooper.apply(e, t, message);
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if (alternative!= null)
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{
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return String.join("\n", alternative);
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}
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}
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return String.join("\n", errorMaker.apply(e, t, message));
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}
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}
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