| L | Util.Annotated |
| Lambda | CSPM.DataStructures.Syntax, CSPM |
| LazyEvalMonad | |
| 1 (Type/Class) | CSPM.Evaluator.Monad |
| 2 (Data Constructor) | CSPM.Evaluator.Monad |
| LazySet | CSPM.Evaluator.ValueSet |
| lbrace | Util.PrettyPrint |
| lbrack | Util.PrettyPrint |
| LeftMode | Util.PrettyPrint |
| LessThan | CSPM.DataStructures.Syntax, CSPM |
| LessThanEq | CSPM.DataStructures.Syntax, CSPM |
| Let | CSPM.DataStructures.Syntax, CSPM |
| lexicalErrorMessage | CSPM.Parser.Exceptions |
| LibCSPMException | Util.Exception |
| lineLength | Util.PrettyPrint |
| LinkParallel | CSPM.DataStructures.Syntax, CSPM |
| List | CSPM.DataStructures.Syntax, CSPM |
| list | Util.PrettyPrint |
| ListComp | CSPM.DataStructures.Syntax, CSPM |
| ListEnumFrom | CSPM.DataStructures.Syntax, CSPM |
| ListEnumFromTo | CSPM.DataStructures.Syntax, CSPM |
| ListLength | CSPM.DataStructures.Syntax, CSPM |
| Lit | CSPM.DataStructures.Syntax, CSPM |
| Literal | CSPM.DataStructures.Syntax, CSPM |
| LivelockFreedom | CSPM.DataStructures.Syntax, CSPM |
| loc | Util.Annotated |
| local | CSPM.TypeChecker.Monad |
| Located | Util.Annotated |
| locatedInner | Util.Annotated |
| locatedLoc | Util.Annotated |
| lookup | |
| 1 (Function) | CSPM.Compiler.Map |
| 2 (Function) | Util.HierarchicalMap, CSPM.Evaluator.Environment, CSPM.TypeChecker.Environment |
| lookupVar | CSPM.Evaluator.Monad |
| lparen | Util.PrettyPrint |
| lstrip | CSPM.Parser.Lexer |
| LToken | CSPM.DataStructures.Tokens |