Extract yul syntax tests: function

test/libyul/yulSyntaxTests/function_defined_in_init_block_1.yul

@@ -0,0 +1,3 @@
+{
+	for { } 1:bool { function f() {} } {}
+}

test/libyul/yulSyntaxTests/function_defined_in_init_block_2.yul

@@ -0,0 +1,3 @@
+{
+	for { } 1:bool {} { function f() {} }
+}

test/libyul/yulSyntaxTests/function_defined_in_init_block_3.yul

@@ -0,0 +1,5 @@
+{
+	for { function f() {} } 1:bool {} {}
+}
+// ----
+// SyntaxError 3441: (9-17): Functions cannot be defined inside a for-loop init block.

test/libyul/yulSyntaxTests/function_defined_in_init_nested_1.yul

@@ -0,0 +1,7 @@
+{
+	for {
+		for {} 1:bool { function f() {} }
+		{}
+	} 1:bool {}
+	{}
+}

test/libyul/yulSyntaxTests/function_defined_in_init_nested_2.yul

@@ -0,0 +1,5 @@
+{
+	for { for {function foo() {}} 1:bool {} {} } 1:bool {} {}
+}
+// ----
+// SyntaxError 3441: (14-22): Functions cannot be defined inside a for-loop init block.

test/libyul/yulSyntaxTests/function_defined_in_init_nested_3.yul

@@ -0,0 +1,8 @@
+{
+	for {}
+		1:bool
+		{for {function foo() {}} 1:bool {} {} }
+	{}
+}
+// ----
+// SyntaxError 3441: (27-35): Functions cannot be defined inside a for-loop init block.

test/libyul/yulSyntaxTests/function_shadowing_outside_vars_1.yul

@@ -0,0 +1,4 @@
+{
+	{ let x:u256 }
+	function f() -> x:u256 {}
+}

test/libyul/yulSyntaxTests/function_shadowing_outside_vars_2.yul

@@ -0,0 +1,6 @@
+{
+	let x:u256
+	function f() -> x:u256 {}
+}
+// ----
+// DeclarationError 1395: (15-40): Variable name x already taken in this scope.