Generalized errors and moved them to src/meta/errors.nim. Further work in the compiler

src/backend/compiler.nim

@@ -16,16 +16,25 @@ import meta/errors
 
 import strformat
 
+export ast
+
 
 type
     IdentifierKind = enum
         Static, Dynamic
 
+    LoopContext = enum
+        Loop, None
+
     IdentifierWrapper = ref object
         kind: IdentifierKind
         node: ASTNode
         isPrivate: bool
     
+    Local = ref object
+        name: ASTNode
+        depth: int
+
     Compiler* = ref object
         ast: seq[ASTNode]
         current: int
@@ -33,9 +42,11 @@ type
         # Keeps track of all identifiers
         # in the code
         names: seq[IdentifierWrapper]
+        locals: seq[Local]
+        localCount: int
+        currentLoop: LoopContext
+        scopeDepth: int
     
-    CompileError* = object of NimVMException
-
 
 proc initCompiler*(): Compiler =
     ## Initializes a new Compiler object

src/backend/lexer.nim

@@ -18,9 +18,13 @@ import strutils
 import parseutils
 import strformat
 import tables
+
 import meta/token
+import meta/errors
+
 
 export token # Makes Token available when importing the lexer module
+export errors
 
 
 # Tables of all character tokens that are not keywords
@@ -95,7 +99,6 @@ type
         start: int
         current: int
         file: string
-    LexingError* = object of CatchableError
 
 
 proc initLexer*(self: Lexer = nil): Lexer =

src/backend/meta/errors.nim

@@ -12,4 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-type NimVMException* = ref object of CatchableError
+type
+    NimVMException* = object of CatchableError
+    LexingError* = object of NimVMException
+    ParseError* = object of NimVMException
+    CompileError* = object of NimVMException
+

src/backend/parser.nim

@@ -19,8 +19,10 @@ import strformat
 
 import meta/token
 import meta/ast
+import meta/errors
 
-export token, ast
+
+export token, ast, errors
 
 
 type 
@@ -33,8 +35,6 @@ type
         file: string
         tokens: seq[Token]
         context: ParseContext
-    ParseError* = object of CatchableError
-        ## A parse error
 
 
 proc initParser*(): Parser =