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parser improve error messages

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This commit is contained in:
Marvin Schlegel 2024-05-08 00:00:18 +02:00
parent 158197b440
commit 5e8a2a90ed
1 changed files with 3 additions and 2 deletions
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5
src/Parser/JavaParser.y
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@ -7,6 +7,7 @@ import Parser.Lexer
%name parse
%tokentype { Token }
%error { parseError }
%errorhandlertype explist
%token
BOOLEAN { BOOLEAN }
@ -368,7 +369,7 @@ data Declarator = Declarator Identifier (Maybe Expression)
convertDeclarator :: DataType -> Declarator -> VariableDeclaration
convertDeclarator dataType (Declarator id assigment) = VariableDeclaration dataType id assigment
parseError :: [Token] -> a
parseError msg = error ("Parse error: " ++ show msg)
parseError :: ([Token], [String]) -> a
parseError (errortoken, expected) = error ("parse error on token: " ++ show errortoken ++ "\nexpected one of: " ++ show expected)
}