Simplified compiler package

src/compiler/eachFunction.go

@@ -0,0 +1,32 @@
+package compiler
+
+import (
+	"git.akyoto.dev/cli/q/src/asm"
+	"git.akyoto.dev/cli/q/src/core"
+)
+
+// eachFunction recursively finds all the calls to external functions.
+// It avoids calling the same function twice with the help of a hashmap.
+func (r *Result) eachFunction(caller *core.Function, traversed map[*core.Function]bool, call func(*core.Function)) {
+	call(caller)
+	traversed[caller] = true
+
+	for _, x := range caller.Assembler.Instructions {
+		if x.Mnemonic != asm.CALL {
+			continue
+		}
+
+		name := x.Data.(*asm.Label).Name
+		callee, exists := r.Functions[name]
+
+		if !exists {
+			continue
+		}
+
+		if traversed[callee] {
+			continue
+		}
+
+		r.eachFunction(callee, traversed, call)
+	}
+}