view lab2/check.mli @ 4:9f5c8e19f204 tip basis

Oops: fix for lab0
author Mike Spivey <mike@cs.ox.ac.uk>
date Mon, 15 Oct 2018 21:58:03 +0100
parents 5dd13b8deb54
children
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(* lab2/check.mli *)
(* Copyright (c) 2017 J. M. Spivey *)

(* 
This module is the semantic analysis pass of the compiler.  It
provides a single function |annotate| that takes a program, checks it
for semantic errors, and annotates each applied occurrence of an
identifier with the corresponding definition.  These annotations are
used by the code generation pass to generate code for variable
references.

If a semantic error is detected, |annotate| raises the exception
|Semantic_error|.  Its arguments are a line number and a format and
argument list that can be passed to printf to print the message.
Because there is no way of resuming the analysis, only one error can
be detected per run of the compiler.
*)

(* |annotate| -- check tree for type errors and annotate with definitions *)
val annotate : Tree.program -> unit

(* |Semantic_error| -- exception raised if error detected *)
exception Semantic_error of string * Print.arg list * int