improve code generation and add test & compilation checking

lib/core/code/module.v

@@ -2,6 +2,7 @@ module code
 
 import freeflowuniverse.herolib.core.pathlib
 import os
+import log
 
 pub struct Module {
 pub mut:
@@ -44,7 +45,18 @@ pub fn (mod Module) write(path string, options WriteOptions) ! {
 	if options.format {
 		os.execute('v fmt -w ${module_dir.path}')
 	}
+	if options.compile {
+		os.execute_opt('v -n -w -enable-globals -shared ${module_dir.path}') or {
+			log.fatal(err.msg())
+		}
+	}
+	if options.test {
+		os.execute_opt('v -n -w -enable-globals test ${module_dir.path}') or {
+			log.fatal(err.msg())
+		}
+	}
 	if options.document {
 		os.execute('v doc -f html -o ${module_dir.path}/docs ${module_dir.path}')
 	}
+
 }

lib/core/code/vgen.v

@@ -143,9 +143,9 @@ pub fn (function Function) vgen(options WriteOptions) string {
 		}
 	}
 
-	params := params_.filter(!it.is_optional).map('${it.name} ${it.typ.symbol}').join(', ')
+	params := params_.filter(!it.is_optional).map(it.vgen()).join(', ')
 
-	receiver := if function.receiver.vgen() != '' {
+	receiver := if function.receiver.vgen().trim_space() != '' {
 		'(${function.receiver.vgen()})'
 	} else {''}
 
@@ -153,7 +153,6 @@ pub fn (function Function) vgen(options WriteOptions) string {
 	result := Param{...function.result,
 		name: ''
 	}.vgen()
-	println('debugzo ${result}')
 
 	mut function_str := $tmpl('templates/function/function.v.template')
 	
@@ -181,11 +180,14 @@ pub fn (param Param) vgen() string {
 	} else {
 		param.typ.symbol
 	}
-
+	param_name := texttools.name_fix_snake(param.name)
-	mut vstr := '${param.name} ${sym}'
+	mut vstr := '${param_name} ${sym}'
 	if param.typ.is_reference {
 		vstr = '&${vstr}'
 	}
+	if param.is_result {
+		vstr = '!${vstr}'
+	}
 	if param.mutable {
 		vstr = 'mut ${vstr}'
 	}
@@ -278,4 +280,6 @@ pub:
 	overwrite bool
 	document  bool
 	prefix    string
+	compile bool // whether to compile the written code
+	test bool // whether to test the written code
 }