add try catch

src/run.go

@@ -197,6 +197,14 @@ func runVal(line any, stack stack, stacklevel int) (any, ArErr) {
 			break
 		}
 		return runAbs(x, stack, stacklevel+1)
+	case TryCatch:
+		if stackoverflow {
+			linenum = x.line
+			path = x.path
+			code = x.code
+			break
+		}
+		return runTryCatch(x, stack, stacklevel+1)
 	case bool, ArObject, number, nil:
 		return x, ArErr{}
 	}

src/translate.go

@@ -42,6 +42,8 @@ func translateVal(code UNPARSEcode, index int, codelines []UNPARSEcode, isLine i
 			return parseForLoop(code, index, codelines)
 		} else if isGenericImport(code) {
 			return parseGenericImport(code, index, codelines)
+		} else if isTryCatch(code) {
+			return parseTryCatch(code, index, codelines)
 		}
 	}
 

src/trycatch.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+)
+
+var tryCompiled = makeRegex(`\s*try\s(.|\n)+`)
+var catchCompiled = makeRegex(`\s*catch\s*\(\s*` + spacelessVariable + `\s*\)\s*(.|\n)+`)
+
+type TryCatch struct {
+	Try       any
+	Catch     any
+	errorName string
+	line      int
+	path      string
+	code      string
+}
+
+func isTryCatch(code UNPARSEcode) bool {
+	return tryCompiled.MatchString(code.code)
+}
+
+func parseTryCatch(code UNPARSEcode, index int, codelines []UNPARSEcode) (TryCatch, bool, ArErr, int) {
+	trytrimmed := strings.TrimSpace(code.code)
+	totalIndex := 0
+	tryparsed, worked, err, i := translateVal(UNPARSEcode{trytrimmed[4:], code.realcode, code.line, code.path}, index, codelines, 1)
+	if !worked {
+		return TryCatch{}, false, err, i
+	}
+	totalIndex += i
+	catchtrimmed := strings.TrimSpace(codelines[index+totalIndex].code)
+	if !catchCompiled.MatchString(catchtrimmed) {
+		fmt.Println(catchtrimmed)
+		return TryCatch{}, false, ArErr{"Syntax Error", "invalid syntax", code.line, code.path, code.realcode, true}, i
+	}
+	catchtrimmed = catchtrimmed[6:]
+	catchbracketSplit := strings.SplitN(catchtrimmed, ")", 2)
+	errorName := strings.TrimSpace(strings.TrimSpace(catchbracketSplit[0])[1:])
+	errcode := catchbracketSplit[1]
+
+	catchparsed, worked, err, i := translateVal(UNPARSEcode{errcode, code.realcode, code.line, code.path}, index+totalIndex, codelines, 1)
+	if !worked {
+		return TryCatch{}, false, err, i
+	}
+	totalIndex += i
+
+	return TryCatch{
+		tryparsed,
+		catchparsed,
+		errorName,
+		code.line,
+		code.path,
+		code.realcode,
+	}, true, ArErr{}, totalIndex
+}
+
+func runTryCatch(t TryCatch, stack stack, stacklevel int) (any, ArErr) {
+	val, err := runVal(t.Try, stack, stacklevel)
+	if err.EXISTS {
+		scope := newscope()
+		scope.obj[t.errorName] = Map(anymap{
+			"type":    err.TYPE,
+			"message": err.message,
+			"line":    newNumber().SetInt64(int64(err.line)),
+			"path":    err.path,
+			"code":    err.code,
+		})
+		val, err = runVal(t.Catch, append(stack, scope), stacklevel)
+		if err.EXISTS {
+			return nil, err
+		}
+	}
+	return val, ArErr{}
+}

src/variable.go

@@ -35,6 +35,8 @@ var blockedVariableNames = map[string]bool{
 	"not":      true,
 	"and":      true,
 	"or":       true,
+	"try":      true,
+	"catch":    true,
 }
 
 type accessVariable struct {
@@ -85,7 +87,7 @@ func readVariable(v accessVariable, stack stack) (any, ArErr) {
 			return val, ArErr{}
 		}
 	}
-	return nil, ArErr{"Runtime Error", "variable \"" + v.name + "\" does not exist", v.line, v.path, v.code, true}
+	return nil, ArErr{"Name Error", "variable \"" + v.name + "\" does not exist", v.line, v.path, v.code, true}
 }
 
 func isSetVariable(code UNPARSEcode) bool {
@@ -212,7 +214,7 @@ func setVariableValue(v setVariable, stack stack, stacklevel int) (any, ArErr) {
 		_, ok := stack[len(stack)-1].obj[v.toset.(accessVariable).name]
 		varMutex.RUnlock()
 		if ok {
-			return nil, ArErr{"Runtime Error", "variable \"" + v.toset.(accessVariable).name + "\" already exists", v.line, v.path, v.code, true}
+			return nil, ArErr{"Name Error", "variable \"" + v.toset.(accessVariable).name + "\" already exists", v.line, v.path, v.code, true}
 		}
 		varMutex.Lock()
 		stack[len(stack)-1].obj[v.toset.(accessVariable).name] = resp
@@ -307,7 +309,7 @@ func runDelete(d ArDelete, stack stack, stacklevel int) (any, ArErr) {
 				return nil, ArErr{}
 			}
 		}
-		return nil, ArErr{"Runtime Error", "variable \"" + x.name + "\" does not exist", d.line, d.path, d.code, true}
+		return nil, ArErr{"Name Error", "variable \"" + x.name + "\" does not exist", d.line, d.path, d.code, true}
 	case ArMapGet:
 		respp, err := runVal(x.VAL, stack, stacklevel+1)
 		if err.EXISTS {