let's just get rid of equals signs entirely

lex.go

@@ -25,8 +25,6 @@ func (t tokenType) String() string {
 		return "t_name"
 	case t_type:
 		return "t_type"
-	case t_equals:
-		return "t_equals"
 	case t_comment:
 		return "t_comment"
 	case t_list_start:
@@ -56,7 +54,6 @@ const (
 	t_string                            // a string literal
 	t_name                              // a name
 	t_type                              // a type
-	t_equals                            // equals sign
 	t_comment                           // a comment
 	t_list_start                        // [
 	t_list_end                          // ]
@@ -189,9 +186,9 @@ func lexRoot(l *lexer) stateFn {
 	switch {
 	case r == eof:
 		return nil
-	case r == '=':
+	case r == ':':
 		l.keep(r)
-		l.emit(t_equals)
+		l.emit(t_object_separator)
 		return lexRoot
 	case r == '"', r == '`':
 		return lexStringLiteral(r)

lex_test.go

@@ -22,12 +22,12 @@ var primitivesTests = []struct {
 	{`Type`, []token{{t_type, "Type"}}},
 	{`CamelType`, []token{{t_type, "CamelType"}}},
 	{`Type_1_2`, []token{{t_type, "Type_1_2"}}},
-	{`=`, []token{{t_equals, "="}}},
-	{` = `, []token{{t_equals, "="}}},
+	{`:`, []token{{t_object_separator, ":"}}},
+	{` : `, []token{{t_object_separator, ":"}}},
 	{`"x" "y"`, []token{{t_string, "x"}, {t_string, "y"}}},
-	{`x = "sam"`, []token{
+	{`x: "sam"`, []token{
 		{t_name, "x"},
-		{t_equals, "="},
+		{t_object_separator, ":"},
 		{t_string, "sam"},
 	}},
 	{`# this is a comment`, []token{{t_comment, " this is a comment"}}},

node.go

@@ -105,7 +105,7 @@ func (n *assignmentNode) parse(p *parser) error {
 		return fmt.Errorf("parse error: saw lex error while parsing assignment node: %v", t.s)
 	case t_eof:
 		return fmt.Errorf("parse error: unexpected eof in assignment node")
-	case t_equals:
+	case t_object_separator:
 	default:
 		return fmt.Errorf("parse error: unexpected %v token after name, expected =", t.t)
 	}

parse_test.go

@@ -22,7 +22,7 @@ var parseTests = []parseTest{
 		},
 	},
 	{
-		source: `name = "jordan"`,
+		source: `name: "jordan"`,
 		root: &rootNode{
 			children: []node{
 				&assignmentNode{"name", "jordan"},
@@ -31,13 +31,13 @@ var parseTests = []parseTest{
 	},
 	{
 		source: `
-        hostname = "jordanorelli.com"
-	    port = 9000
-        freq = 1e9
-        duty = 0.2
-        neg = -2
-        neg2 = -2.3
-        imag = 1+2i
+            hostname: "jordanorelli.com"
+            port: 9000
+            freq: 1e9
+            duty: 0.2
+            neg: -2
+            neg2: -2.3
+            imag: 1+2i
 	    `,
 		root: &rootNode{
 			children: []node{
@@ -53,9 +53,9 @@ var parseTests = []parseTest{
 	},
 	{
 		source: `
-	       first_name = "jordan" # yep, that's my name
-	       last_name = "orelli"  # comments should be able to follow other shit
-	       `,
+            first_name: "jordan" # yep, that's my name
+            last_name: "orelli"  # comments should be able to follow other shit
+        `,
 		root: &rootNode{
 			children: []node{
 				&assignmentNode{"first_name", "jordan"},
@@ -67,8 +67,8 @@ var parseTests = []parseTest{
 	},
 	{
 		source: `
-	       heroes = ["lina", "cm"]
-	       `,
+            heroes: ["lina", "cm"]
+        `,
 		root: &rootNode{
 			children: []node{
 				&assignmentNode{"heroes", list{"lina", "cm"}},
@@ -77,8 +77,8 @@ var parseTests = []parseTest{
 	},
 	{
 		source: `
-	       nested = [["one", "two"], ["three", "four"]]
-	       `,
+            nested: [["one", "two"], ["three", "four"]]
+        `,
 		root: &rootNode{
 			children: []node{
 				&assignmentNode{"nested", list{list{"one", "two"}, list{"three", "four"}}},
@@ -87,11 +87,11 @@ var parseTests = []parseTest{
 	},
 	{
 		source: `
-	       nested = [
+            nested: [
 	           ["one", "two"],
 	           ["three", "four"],
-	       ]
-	       `,
+	        ]
+        `,
 		root: &rootNode{
 			children: []node{
 				&assignmentNode{"nested", list{list{"one", "two"}, list{"three", "four"}}},
@@ -100,7 +100,7 @@ var parseTests = []parseTest{
 	},
 	{
 		source: `
-	    admin = {first_name: "jordan", last_name: "orelli"}
+            admin: {first_name: "jordan", last_name: "orelli"}
 	    `,
 		root: &rootNode{
 			children: []node{
@@ -113,11 +113,11 @@ var parseTests = []parseTest{
 	},
 	{
 		source: `
-	       http = {
+            http: {
 	           port: 9000,
 	           routes: "/path/to/some/file",
-	       }
-	       `,
+            }
+        `,
 		root: &rootNode{
 			children: []node{
 				&assignmentNode{"http", object{