lift the inference engine up a level

src/compiler.rs

@@ -1,5 +1,5 @@
 use crate::syntax::Program as Syntax;
-use crate::{backend::Backend, ir::TypeInferenceResult};
+use crate::{backend::Backend, type_infer::TypeInferenceResult};
 use codespan_reporting::{
     diagnostic::Diagnostic,
     files::SimpleFiles,

src/ir.rs

@@ -12,10 +12,8 @@
 //! validating syntax, and then figuring out how to turn it into Cranelift
 //! and object code. After that point, however, this will be the module to
 //! come to for analysis and optimization work.
-mod ast;
+pub mod ast;
 mod eval;
 mod strings;
-mod type_infer;
 
 pub use ast::*;
-pub use type_infer::{TypeInferenceError, TypeInferenceResult, TypeInferenceWarning};

src/lib.rs

@@ -67,6 +67,7 @@ pub mod eval;
 mod examples;
 pub mod ir;
 pub mod syntax;
+pub mod type_infer;
 
 /// Implementation module for the high-level compiler.
 mod compiler;

src/repl.rs

@@ -1,5 +1,5 @@
 use crate::backend::{Backend, BackendError};
-use crate::ir::TypeInferenceResult;
+use crate::type_infer::TypeInferenceResult;
 use crate::syntax::{ConstantType, Location, ParserError, Statement};
 use codespan_reporting::diagnostic::Diagnostic;
 use codespan_reporting::files::SimpleFiles;

src/type_infer/convert.rs

@@ -1,7 +1,7 @@
 use super::ast as ir;
 use super::ast::Type;
 use crate::eval::PrimitiveType;
-use crate::ir::type_infer::solve::Constraint;
+use crate::type_infer::solve::Constraint;
 use crate::syntax::{self, ConstantType};
 use internment::ArcIntern;
 use std::collections::HashMap;