parsing break, var decl

src/ndspkg/compv2/parser.nim

@@ -109,17 +109,18 @@ proc peek(parser: Parser): Token =
 proc peekMatch(parser: Parser, tokenType: TokenType): bool =
   parser.peek().tokenType == tokenType
 
+proc isAtEnd(parser: Parser): bool =
+  parser.current.tokenType == tkEof
+
 proc synchronize(parser: Parser) =
   parser.panicMode = false
-  while parser.current.tokenType != tkEof:
+  while not parser.isAtEnd():
     if parser.previous.get().tokenType in {tkSemicolon}:
       return
     if parser.current.tokenType in {tkProc, tkVar, tkFor, tkIf, tkWhile, tkRightBrace}:
       return
     parser.advance()
 
-proc isAtEnd(parser: Parser): bool =
-  parser.current.tokenType == tkEof
 # EXPRESSIONS
 
 proc expression(parser: Parser): Node
@@ -464,6 +465,21 @@ proc statement(parser: Parser, inBlock: bool = false): Node =
       let funct = parser.parseProcDeclaration()
       result = Node(kind: nkVarDecl, name: varname, value: funct)
       discard parser.consume(tkSemicolon, "';' expected after procedure declaration.")
+  elif parser.match(tkBreak):
+    if parser.match(tkLabel):
+      result = Node(kind: nkBreak, label: parser.previous.get().text[1..^1])
+    else:
+      result = Node(kind: nkBreak, label: "")
+    discard parser.consume(tkSemicolon, "';' expected after break statement.")
+  elif parser.match(tkVar):
+    discard parser.consume(tkIdentifier, "Identifier expected after 'var'.")
+    let name = parser.previous.get().text
+    if parser.match(tkEqual):
+      let val = parser.expression()
+      result = Node(kind: nkVarDecl, name: name, value: val)
+    else:
+      result = Node(kind: nkVarDecl, name: name, value: nil)
+    discard parser.consume(tkSemicolon, "';' expected after variable declaration.")
   else:
     result = parser.exprStatement(inBlock)