Also fix the jump if its the last one

Signed-off-by: Marcel Müller <neikos@neikos.email>

src/emit/mod.rs

@@ -147,7 +147,7 @@ fn emit_ast_expr(
                             *jump = new_jump as isize;
                         } else {
                             panic!("Got an else without a previous if?");
-                        };
+                        }
 
                         if let Some(expression) = expression {
                             let emit_slot = machine.reserve_slot();
@@ -167,6 +167,15 @@ fn emit_ast_expr(
                 }
             }
 
+            if let Some(previous_jump) = previous_jump.take() {
+                let new_jump = eval.len() - previous_jump - 1;
+                let Instruction::JumpIfNotTrue { jump, .. } = &mut eval[previous_jump] else {
+                    panic!("Jump slot had something that is not a jump?!");
+                };
+
+                *jump = new_jump as isize;
+            }
+
             if let Some(ws) = previous_post_whitespace_content {
                 eval.push(Instruction::AppendContent {
                     content: ws.source().clone(),

tests/cases/1-parsed@if_else_if.snap

@@ -0,0 +1,36 @@
+---
+source: tests/file_tests.rs
+expression: parsed
+input_file: tests/cases/if_else_if.nomo
+---
+ParsedTemplate {
+    tokens: [
+        [LeftDelim]"{{" (0..2),
+        [Whitespace]" " (2..3),
+        [ConditionalIf]"if" (3..5),
+        [Whitespace]" " (5..6),
+        [Ident]"test" (6..10),
+        [Whitespace]" " (10..11),
+        [RightDelim]"}}" (11..13),
+        [Whitespace]"\n    " (13..18),
+        [Content]"Not Hello World! :C" (18..37),
+        [Whitespace]"\n" (37..38),
+        [LeftDelim]"{{" (38..40),
+        [Whitespace]" " (40..41),
+        [ConditionalElse]"else" (41..45),
+        [Whitespace]" " (45..46),
+        [ConditionalIf]"if" (46..48),
+        [Whitespace]" " (48..49),
+        [Ident]"another_test" (49..61),
+        [Whitespace]" " (61..62),
+        [RightDelim]"}}" (62..64),
+        [Whitespace]"\n    " (64..69),
+        [Content]"Hello World!" (69..81),
+        [Whitespace]"\n" (81..82),
+        [LeftDelim]"{{" (82..84),
+        [Whitespace]" " (84..85),
+        [End]"end" (85..88),
+        [Whitespace]" " (88..89),
+        [RightDelim]"}}" (89..91),
+    ],
+}

tests/cases/2-ast@if_else_if.snap

@@ -0,0 +1,60 @@
+---
+source: tests/file_tests.rs
+expression: ast
+input_file: tests/cases/if_else_if.nomo
+---
+TemplateAst {
+    root: [
+        ConditionalChain {
+            chain: [
+                Block {
+                    prev_whitespace_content: None,
+                    expression: IfConditional {
+                        expression: VariableAccess(
+                            [Ident]"test" (6..10),
+                        ),
+                    },
+                    post_whitespace_content: Some(
+                        [Whitespace]"\n    " (13..18),
+                    ),
+                },
+                ConditionalContent {
+                    content: [
+                        StaticContent(
+                            [Content]"Not Hello World! :C" (18..37),
+                        ),
+                    ],
+                },
+                Block {
+                    prev_whitespace_content: Some(
+                        [Whitespace]"\n" (37..38),
+                    ),
+                    expression: ElseConditional {
+                        expression: Some(
+                            VariableAccess(
+                                [Ident]"another_test" (49..61),
+                            ),
+                        ),
+                    },
+                    post_whitespace_content: Some(
+                        [Whitespace]"\n    " (64..69),
+                    ),
+                },
+                ConditionalContent {
+                    content: [
+                        StaticContent(
+                            [Content]"Hello World!" (69..81),
+                        ),
+                    ],
+                },
+                Block {
+                    prev_whitespace_content: Some(
+                        [Whitespace]"\n" (81..82),
+                    ),
+                    expression: EndBlock,
+                    post_whitespace_content: None,
+                },
+            ],
+        },
+    ],
+}

tests/cases/3-instructions@condition.snap

@@ -14,7 +14,7 @@ input_file: tests/cases/condition.nomo
         emit_slot: VariableSlot {
             index: 0,
         },
-        jump: 9223372036854775807,
+        jump: 5,
     },
     AppendContent {
         content: "\n    " (13..18),

tests/cases/3-instructions@if_else_if.snap

@@ -0,0 +1,61 @@
+---
+source: tests/file_tests.rs
+expression: emit
+input_file: tests/cases/if_else_if.nomo
+---
+[
+    LoadFromContextToSlot {
+        name: "test" (6..10),
+        slot: VariableSlot {
+            index: 0,
+        },
+    },
+    JumpIfNotTrue {
+        emit_slot: VariableSlot {
+            index: 0,
+        },
+        jump: 5,
+    },
+    AppendContent {
+        content: "\n    " (13..18),
+    },
+    AppendContent {
+        content: "Not Hello World! :C" (18..37),
+    },
+    Jump {
+        jump: 9,
+    },
+    AppendContent {
+        content: "\n    " (13..18),
+    },
+    AppendContent {
+        content: "\n" (37..38),
+    },
+    LoadFromContextToSlot {
+        name: "another_test" (49..61),
+        slot: VariableSlot {
+            index: 1,
+        },
+    },
+    JumpIfNotTrue {
+        emit_slot: VariableSlot {
+            index: 1,
+        },
+        jump: 5,
+    },
+    AppendContent {
+        content: "\n    " (64..69),
+    },
+    AppendContent {
+        content: "Hello World!" (69..81),
+    },
+    Jump {
+        jump: 2,
+    },
+    AppendContent {
+        content: "\n    " (64..69),
+    },
+    AppendContent {
+        content: "\n" (81..82),
+    },
+]

tests/cases/4-output@if_else_if.snap

@@ -0,0 +1,6 @@
+---
+source: tests/file_tests.rs
+expression: output
+input_file: tests/cases/if_else_if.nomo
+---
+"\n\n    Hello World!\n"

tests/cases/if_else_if.nomo

@@ -0,0 +1,11 @@
+{
+    "test": false,
+    "another_test": true,
+    "stuff": "more"
+}
+---
+{{ if test }}
+    Not Hello World! :C
+{{ else if another_test }}
+    Hello World!
+{{ end }}