Add basic type system with only integers

This commit adds static typing with signed and unsigned integers of 8,
16, 32 and 64 bits.

1 files changed, 20 insertions, 3 deletions

diff --git a/decl.go b/decl.go
index 67d641f..53c6c74 100644
--- a/decl.go
+++ b/decl.go
@@ -4,9 +4,26 @@
 
 package main
 
-var funcs = map[string]struct{}{}
-var localConsts = map[string]map[string]string{}
-var localMuts = map[string]map[string]struct{}{}
+var funcs = map[string]*funcInfo{}
+var localConsts = map[string]map[string]*localConst{}
+var localMuts = map[string]map[string]*localMut{}
+
+type funcInfo struct {
+	params     []paramInfo
+	returnType cerType
+}
+
+type paramInfo struct {
+	typ cerType
+}
+
+type localConst struct {
+	typ cerType
+}
+
+type localMut struct {
+	typ cerType
+}
 
 func isDeclared(name string, toplevel bool) (ok bool, mutable bool) {
 	if toplevel {