BridgeJS: Fix support for negative enum values for raw value types

Author: krodak

Plugins/BridgeJS/Sources/BridgeJSCore/ExportSwift.swift

@@ -981,12 +981,23 @@ public class ExportSwift {
                         rawValue = stringLiteral.segments.first?.as(StringSegmentSyntax.self)?.content.text
                     } else if let boolLiteral = element.rawValue?.value.as(BooleanLiteralExprSyntax.self) {
                         rawValue = boolLiteral.literal.text
-                    } else if let intLiteral = element.rawValue?.value.as(IntegerLiteralExprSyntax.self) {
-                        rawValue = intLiteral.literal.text
-                    } else if let floatLiteral = element.rawValue?.value.as(FloatLiteralExprSyntax.self) {
-                        rawValue = floatLiteral.literal.text
                     } else {
-                        rawValue = nil
+                        var numericExpr = element.rawValue?.value
+                        var isNegative = false
+                        if let prefixExpr = numericExpr?.as(PrefixOperatorExprSyntax.self),
+                            prefixExpr.operator.text == "-"
+                        {
+                            numericExpr = prefixExpr.expression
+                            isNegative = true
+                        }
+
+                        if let intLiteral = numericExpr?.as(IntegerLiteralExprSyntax.self) {
+                            rawValue = isNegative ? "-\(intLiteral.literal.text)" : intLiteral.literal.text
+                        } else if let floatLiteral = numericExpr?.as(FloatLiteralExprSyntax.self) {
+                            rawValue = isNegative ? "-\(floatLiteral.literal.text)" : floatLiteral.literal.text
+                        } else {
+                            rawValue = nil
+                        }
                     }
                 } else {
                     rawValue = nil

Plugins/BridgeJS/Tests/BridgeJSToolTests/Inputs/EnumRawType.swift

@@ -28,7 +28,7 @@
 }
 
 @JS enum Priority: Int32 {
-    case lowest = 1
+    case lowest = -1
     case low = 2
     case medium = 3
     case high = 4

Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSLinkTests/EnumRawType.Export.d.ts

@@ -37,7 +37,7 @@ export enum TSHttpStatus {
 }
 
 export const PriorityValues: {
-    readonly Lowest: 1;
+    readonly Lowest: -1;
     readonly Low: 2;
     readonly Medium: 3;
     readonly High: 4;

Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/BridgeJSLinkTests/EnumRawType.Export.js

@@ -34,7 +34,7 @@ export const TSHttpStatus = {
 };
 
 export const PriorityValues = {
-    Lowest: 1,
+    Lowest: -1,
     Low: 2,
     Medium: 3,
     High: 4,

Plugins/BridgeJS/Tests/BridgeJSToolTests/__Snapshots__/ExportSwiftTests/EnumRawType.json

@@ -178,7 +178,7 @@
 
           ],
           "name" : "lowest",
-          "rawValue" : "1"
+          "rawValue" : "-1"
         },
         {
           "associatedValues" : [