From 836149ffc24fc6424d5902d0e1f025445fb80654 Mon Sep 17 00:00:00 2001
From: Arsen Musayelyan <moussaelianarsen@gmail.com>
Date: Mon, 5 Apr 2021 11:28:47 -0700
Subject: [PATCH] Add goroutines

---
 ast.go      | 46 +++++++++++++++++++++++++++++-----------------
 defaults.go |  4 ++--
 2 files changed, 31 insertions(+), 19 deletions(-)

diff --git a/ast.go b/ast.go
index 1c17552..03d9a74 100644
--- a/ast.go
+++ b/ast.go
@@ -268,6 +268,12 @@ func executeCmd(cmd *Command) error {
 				return fmt.Errorf("%s: %s", Call.Pos, err)
 			}
 		}
+	} else if cmd.Goroutines != nil {
+		// For each function call
+		for _, goroutine := range cmd.Goroutines {
+			// Attempt to call function
+			go CallFunction(goroutine.Call)
+		}
 	} else if cmd.Ifs != nil {
 		// For each if statement
 		for _, If := range cmd.Ifs {
@@ -310,27 +316,28 @@ func executeCmd(cmd *Command) error {
 
 // Command stores any commands encountered while parsing a script
 type Command struct {
-	Pos      lexer.Position
-	Vars     []*Var      `( @@`
-	Ifs      []*If       `| @@`
-	RptLoops []*RptLoop  `| @@`
-	WhlLoops []*WhlLoop  `| @@`
-	Defs     []*FuncDef  `| @@`
-	Calls    []*FuncCall `| @@)`
+	Pos        lexer.Position
+	Vars       []*Var       `( @@`
+	Ifs        []*If        `| @@`
+	RptLoops   []*RptLoop   `| @@`
+	WhlLoops   []*WhlLoop   `| @@`
+	Defs       []*FuncDef   `| @@`
+	Goroutines []*Goroutine `| @@`
+	Calls      []*FuncCall  `| @@ )`
 }
 
 // Value stores any literal values encountered while parsing a script
 type Value struct {
-	Pos    lexer.Position
-	String *string      `  @String`
-	Number *float64     `| @Number`
-	Bool   *Bool        `| @("true" | "false")`
-	SubCmd *FuncCall    `| "(" @@ ")"`
-	VarVal *VarVal      `| @@`
-	Expr   *Expression  `| "{" @@ "}"`
-	Map    []*MapKVPair `| "[" (@@ ("," @@)* )? "]"`
-	Array  []*Value     `| "[" (@@ ("," @@)* )? "]"`
-	Opposite *Value `| "!" @@`
+	Pos      lexer.Position
+	String   *string      `  @String`
+	Number   *float64     `| @Number`
+	Bool     *Bool        `| @("true" | "false")`
+	SubCmd   *FuncCall    `| "(" @@ ")"`
+	VarVal   *VarVal      `| @@`
+	Expr     *Expression  `| "{" @@ "}"`
+	Map      []*MapKVPair `| "[" (@@ ("," @@)* )? "]"`
+	Array    []*Value     `| "[" (@@ ("," @@)* )? "]"`
+	Opposite *Value       `| "!" @@`
 }
 
 // Bool stores boolean values encountered while parsing a script.
@@ -352,6 +359,11 @@ type FuncCall struct {
 	Args []*Arg `@@*`
 }
 
+type Goroutine struct {
+	Pos  lexer.Position
+	Call *FuncCall `"go" @@`
+}
+
 // Arg stores arguments for function calls
 type Arg struct {
 	Pos   lexer.Position
diff --git a/defaults.go b/defaults.go
index 4df6249..fcdd832 100644
--- a/defaults.go
+++ b/defaults.go
@@ -22,7 +22,7 @@ var Funcs = FuncMap{
 	"append": appendArray,
 	"exit":   scptExit,
 	"return": setReturn,
-	"print": scptPrint,
+	"print":  scptPrint,
 }
 
 // Default function to convert unnamed argument to a string using fmt.Sprint
@@ -116,4 +116,4 @@ func scptPrint(args map[string]interface{}) (interface{}, error) {
 	// Print message
 	fmt.Println(val)
 	return nil, nil
-}
\ No newline at end of file
+}