Implement type-to-string-to-type mappings

api/funcmapper/funcmapper.go

@@ -19,13 +19,6 @@ const (
 
 const tmplParseFuncs = `package ` + packageName + `
 
-import (
-	"context"
-	"io"
-	"net/http"
-	"reflect"
-)
-
 // Generated map of Parse functions to support
 // dynamic reflection upon parser functions
 var ParseFunctionsMap = map[string]interface{}{
@@ -41,15 +34,30 @@ type FunctionParamInfo struct {
 }
 
 const tmplFuncParams = `
-var FunctionParams = map[string][]reflect.Type{
+// List of functions in eiaapi package
+// with slice of arg types as strings
+var FunctionParams = map[string][]string{
 {{- range .}}
 	"{{ .FunctionName }}": {
 	  {{- range .Params }}
-	  reflect.TypeOf((*{{ . }})(nil)).Elem(),
+	  {{ . | printf "\"%s\"" }},
 	  {{- end }}
 	},
 {{- end}}
 }
+
+func GetFuncParamType(funcName string, idx int) string {
+	funcParams, exists := FunctionParams[funcName]
+	if !exists {
+		return ""
+	}
+
+	if idx < len(funcParams) {
+	  return funcParams[idx]
+	}
+
+	return ""
+}
 `
 
 func main() {
@@ -137,7 +145,7 @@ func exprToString(expr ast.Expr) string {
 	case *ast.ArrayType:
 		return "[]" + exprToString(t.Elt) // Array type
 	case *ast.StarExpr:
-		return exprToString(t.X) // Pointer type
+		return "*" + exprToString(t.X) // Pointer type
 	case *ast.SelectorExpr:
 		return fmt.Sprintf("%s.%s", exprToString(t.X), t.Sel.Name) // Qualified type like "pkg.Type"
 	case *ast.FuncType: