In AnyDSL, Impala is a host language for shallow-embedded DSLs. No parser generators/grammar required/needed as that is not the point. From the last paragraph

In AnyDSL, Impala is a host language for shallow-embedded DSLs. No parser generators/grammar required/needed as that is not the point. From the last paragraph of the overview section: "The DSL developer just reuses Impala's infrastructure (lexer, parser, semantic analysis, and code generator). He does not need to develop his own front-end." We should probably emphasise that and restructure the introduction text.