From 615d5e2eb460851838448c5b1bd7a768b79c9ab9 Mon Sep 17 00:00:00 2001 From: PeterBocan Date: Tue, 2 Jul 2019 15:46:54 +0200 Subject: [PATCH] Struct allocation fixes. --- examples/structs/structs.go | 8 ++++---- examples/structs/structs.hash | 4 ++-- public/structs | 24 ++++++++++++++++++------ 3 files changed, 24 insertions(+), 12 deletions(-) diff --git a/examples/structs/structs.go b/examples/structs/structs.go index 21584a2..e2546fe 100644 --- a/examples/structs/structs.go +++ b/examples/structs/structs.go @@ -12,9 +12,8 @@ type person struct { age int } -// A de facto constructor of type `person`. +// NewPerson constructs a new person struct with the given name func NewPerson(name string) *person { - // You can safely return a pointer to local variable // as a local variable will survive the scope of the function. p := person{name: name} @@ -36,6 +35,9 @@ func main() { // An `&` prefix yields a pointer to the struct. fmt.Println(&person{name: "Ann", age: 40}) + // It's idiomatic to encapsulate new struct creation in constructor functions + fmt.Println(NewPerson("Jon")) + // Access struct fields with a dot. s := person{name: "Sean", age: 50} fmt.Println(s.name) @@ -49,6 +51,4 @@ func main() { sp.age = 51 fmt.Println(sp.age) - // Call our constructor - fmt.Println(NewPerson("Jon")) } diff --git a/examples/structs/structs.hash b/examples/structs/structs.hash index a1194e9..50e4d67 100644 --- a/examples/structs/structs.hash +++ b/examples/structs/structs.hash @@ -1,2 +1,2 @@ -71e8ecdcf8c8fbddbb250ada5bbe8659b68d5229 -nHvnHAGTYHq +cd504951e9f8504c159a66714b04bfda0629e58c +ezfE4eojTS7 diff --git a/public/structs b/public/structs index 22fd85f..0ea36aa 100644 --- a/public/structs +++ b/public/structs @@ -29,7 +29,7 @@ records.

- + 
package main
@@ -68,7 +68,7 @@ records.

         
         
           
-            
A de facto constructor of type person.

+            
NewPerson constructs a new person struct with the given name

 
           
           
@@ -160,6 +160,19 @@ as a local variable will survive the scope of the function.

           
         
         
+        
+          
+            
It’s idiomatic to encapsulate new struct creation in constructor functions

+
+          
+          
+            
+            
    fmt.Println(NewPerson("Jon"))
+

+
+          
+        
+        
         
           
             
Access struct fields with a dot.

@@ -205,13 +218,11 @@ pointers are automatically dereferenced.

         
         
           
-            
Call our constructor

-
+            
           
           
             
-            
    fmt.Println(NewPerson("Jon"))
-}
+            
}
 

 
           
@@ -235,6 +246,7 @@ pointers are automatically dereferenced.

 Sean
 50
 51
+&{Jon 42}