Add emitting of function calls

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

src/ast/mod.rs

@@ -270,7 +270,7 @@ pub enum TemplateAstExpr<'input> {
         value: NomoValue,
     },
     FunctionCall {
-        name: Box<TemplateAstExpr<'input>>,
+        name: TemplateToken,
         args: Vec<TemplateAstExpr<'input>>,
     },
 }
@@ -568,9 +568,7 @@ fn parse_function<'input>(input: &mut Input<'input>) -> Result<TemplateAstExpr<'
     trace(
         "variable_access",
         (
-            TokenKind::Ident
+            TokenKind::Ident,
-                .map(TemplateAstExpr::VariableAccess)
-                .map(Box::new),
             TokenKind::LeftArgList,
             separated(0.., parse_expression, TokenKind::ArgSeperator),
             TokenKind::RightArgList,

src/ast/snapshots/nomo__ast__tests__check_function_call.snap

@@ -7,9 +7,7 @@ TemplateAst {
         Interpolation {
             prev_whitespace_content: None,
             expression: FunctionCall {
-                name: VariableAccess(
+                name: [Ident]"foo" (4..7),
-                    [Ident]"foo" (4..7),
-                ),
                 args: [
                     Operation {
                         op: Times,
@@ -27,9 +25,7 @@ TemplateAst {
                         },
                     },
                     FunctionCall {
-                        name: VariableAccess(
+                        name: [Ident]"bar" (15..18),
-                            [Ident]"bar" (15..18),
-                        ),
                         args: [
                             Operation {
                                 op: Plus,

src/emit/mod.rs

@@ -102,6 +102,11 @@ pub enum Instruction {
         right_slot: VariableSlot,
         result_slot: VariableSlot,
     },
+    FunctionCall {
+        name: NomoInput,
+        args: Vec<VariableSlot>,
+        slot: VariableSlot,
+    },
 }
 
 #[derive(Debug, Clone)]
@@ -456,11 +461,24 @@ fn emit_expr_load(
                 result_slot: emit_slot,
             });
         }
+        TemplateAstExpr::FunctionCall { name, args } => {
+            let mut arg_slots = vec![];
+            for arg in args {
+                let slot = machine.reserve_slot();
+                emit_expr_load(machine, eval, slot, arg);
+                arg_slots.push(slot);
+            }
+
+            eval.push(Instruction::FunctionCall {
+                name: name.source(),
+                args: arg_slots,
+                slot: emit_slot,
+            });
+        }
         TemplateAstExpr::Invalid { .. } => eval.push(Instruction::Abort),
         TemplateAstExpr::StaticContent { .. } | TemplateAstExpr::Interpolation { .. } => {
             unreachable!("Invalid AST here")
         }
-        TemplateAstExpr::FunctionCall { .. } => todo!(),
         TemplateAstExpr::ConditionalChain { .. } => todo!(),
         TemplateAstExpr::ElseConditional { .. } => todo!(),
         TemplateAstExpr::EndBlock => todo!(),
@@ -526,4 +544,17 @@ mod tests {
 
         insta::assert_debug_snapshot!(emit);
     }
+
+    #[test]
+    fn check_function_call() {
+        let input = "{{ if foo(23) }} bar {{ else }} foobar {{ end }}";
+
+        let parsed = crate::parser::parse(input.into()).unwrap();
+
+        let ast = crate::ast::parse(parsed.tokens()).unwrap();
+
+        let emit = emit_machine(ast);
+
+        insta::assert_debug_snapshot!(emit);
+    }
 }

src/emit/snapshots/nomo__emit__tests__check_function_call.snap

@@ -0,0 +1,79 @@
+---
+source: src/emit/mod.rs
+expression: emit
+---
+VMInstructions {
+    labels: {
+        LabelSlot {
+            index: 0,
+        }: 13,
+        LabelSlot {
+            index: 3,
+        }: 8,
+    },
+    instructions: [
+        LoadLiteralToSlot {
+            source: [Literal(Integer(23))]"23" (10..12),
+            value: Integer {
+                value: 23,
+            },
+            slot: VariableSlot {
+                index: 2,
+            },
+        },
+        FunctionCall {
+            name: "foo" (6..9),
+            args: [
+                VariableSlot {
+                    index: 2,
+                },
+            ],
+            slot: VariableSlot {
+                index: 1,
+            },
+        },
+        JumpIfNotTrue {
+            emit_slot: VariableSlot {
+                index: 1,
+            },
+            jump: LabelSlot {
+                index: 3,
+            },
+        },
+        AppendContent {
+            content: " " (16..17),
+        },
+        AppendContent {
+            content: "bar" (17..20),
+        },
+        AppendContent {
+            content: " " (20..21),
+        },
+        Jump {
+            jump: LabelSlot {
+                index: 0,
+            },
+        },
+        AppendContent {
+            content: " " (16..17),
+        },
+        AppendContent {
+            content: " " (31..32),
+        },
+        AppendContent {
+            content: "foobar" (32..38),
+        },
+        AppendContent {
+            content: " " (38..39),
+        },
+        Jump {
+            jump: LabelSlot {
+                index: 0,
+            },
+        },
+        AppendContent {
+            content: " " (31..32),
+        },
+        NoOp,
+    ],
+}

src/eval/mod.rs

@@ -208,6 +208,7 @@ pub fn execute(vm: &VMInstructions, global_context: &Context) -> Result<String,
 
                 scopes.insert_into_slot(*result_slot, result.unwrap());
             }
+            Instruction::FunctionCall { .. } => todo!(),
         }
 
         ip += 1;