catala/compiler/desugared/desugared.mld

{0 Desugared representation }

This representation is the second in the compilation chain
(see {{: index.html#architecture} Architecture}). Its main difference
with {{: surface.html} the surface representation} is that the legislative
text has been discarded and all the definitions of each variables have been
collected in the same place rather than being scattered across the code base.

The module describing the abstract syntax tree is:

{!modules: Desugared.Ast}

{1 Translation to the scope language}

Before the translation to the {{: scopelang.html} scope language},
{!module: Desugared.Dependency} checks that within
a scope, there is no computational circular dependency between the variables
of the scope. When the dependency graph is a DAG,
{!module:Scopelang.From_desugared} performs a topological ordering to
produce an ordered list of the scope definitions compatible with the
computation order. All the graph computations are done using the
{{:http://ocamlgraph.lri.fr/} Ocamlgraph} library.

The other important piece of work performed by
{!module:Scopelang.From_desugared} is the construction of the default trees
(see {!Shared_ast.EDefault}) from the list of prioritized rules.

Related modules:

{!modules: Desugared.Dependency Scopelang.From_desugared}