fix: list as root #491

packages/mecha/examples/basic_list/beet.yaml

@@ -0,0 +1,12 @@
+
+
+data_pack:
+  load: .
+
+
+pipeline:
+  - mecha
+
+meta:
+  mecha:
+    multiline: true

packages/mecha/examples/basic_list/data/test/function/test.mcfunction

@@ -0,0 +1,20 @@
+item modify entity @s armor.feet [{function:"minecraft:set_components",components:{"minecraft:equippable":{slot:"feet",asset_id:"minecraft:netherite"}}}]
+
+
+execute if predicate [{condition:"minecraft:all_of",terms:[{condition:"minecraft:random_chance",chance:5},{condition:"minecraft:value_check",value:0,range:0}]},{condition:"minecraft:reference",name:"test:l"}] run say aaa
+
+
+
+execute if predicate [
+    {
+        condition:"minecraft:value_check",
+        name:"test:l",
+        value:0,
+        range:{min:0,max:2}
+    },
+    [
+        {condition:"minecraft:value_check",name:"test:l",value:0,range:{min:1,max:2}}
+    ]
+    ] run say bb
+
+

packages/mecha/src/mecha/parse.py

@@ -28,6 +28,7 @@
     "JsonObjectParser",
     "NbtParser",
     "NbtCompoundParser",
+    "NbtListParser",
     "AdjacentConstraint",
     "ResourceLocationParser",
     "NoTagConstraint",
@@ -226,6 +227,7 @@ def get_default_parsers() -> Dict[str, Parser]:
         "nbt_compound_entry": nbt_parser.parse_compound_entry,
         "nbt_list_or_array_element": delegate("nbt"),
         "nbt_compound": NbtCompoundParser(delegate("nbt")),
+        "nbt_list": NbtListParser(delegate("nbt")),
         "adjacent_nbt_compound": AdjacentConstraint(delegate("nbt_compound"), r"\{"),
         "nbt_path": NbtPathParser(
             integer_parser=delegate("integer"),
@@ -238,6 +240,9 @@ def get_default_parsers() -> Dict[str, Parser]:
         "resource_location_or_nbt": AlternativeParser(
             [delegate("resource_location"), delegate("nbt_compound")]
         ),
+        "resource_location_or_nbt_list": AlternativeParser(
+            [delegate("resource_location_or_nbt"), delegate("nbt_list")]
+        ),
         "uuid": parse_uuid,
         "objective": BasicLiteralParser(AstObjective),
         "objective_criteria": BasicLiteralParser(AstObjectiveCriteria),
@@ -513,10 +518,10 @@ def get_default_parsers() -> Dict[str, Parser]:
             delegate("resource_location_or_nbt")
         ),
         "command:argument:minecraft:loot_predicate": MultilineParser(
-            delegate("resource_location_or_nbt")
+            delegate("resource_location_or_nbt_list")
         ),
         "command:argument:minecraft:loot_modifier": MultilineParser(
-            delegate("resource_location_or_nbt")
+            delegate("resource_location_or_nbt_list")
         ),
         "command:argument:minecraft:game_profile": delegate("game_profile"),
         "command:argument:minecraft:gamemode": delegate("gamemode"),
@@ -1322,6 +1327,15 @@ class NbtCompoundParser(TypeConstraint):
     message: str = "Expected nbt compound."
 
 
+@dataclass
+class NbtListParser(TypeConstraint):
+    """Parser for nbt list."""
+
+    parser: Parser = field(default_factory=NbtParser)
+    type: Union[Type[Any], Tuple[Type[Any], ...]] = AstNbtList
+    message: str = "Expected nbt list."
+
+
 @dataclass
 class AdjacentConstraint:
     """Constraint that ensures that there are no whitespace separators."""

packages/mecha/tests/snapshots/examples__build_basic_list__0.pack.md

@@ -0,0 +1,31 @@
+# Lectern snapshot
+
+## Data pack
+
+`@data_pack pack.mcmeta`
+
+```json
+{
+  "pack": {
+    "min_format": [
+      94,
+      1
+    ],
+    "max_format": [
+      94,
+      1
+    ],
+    "description": ""
+  }
+}
+```
+
+### test
+
+`@function test:test`
+
+```mcfunction
+item modify entity @s armor.feet [{function: "minecraft:set_components", components: {"minecraft:equippable": {slot: "feet", asset_id: "minecraft:netherite"}}}]
+execute if predicate [{condition: "minecraft:all_of", terms: [{condition: "minecraft:random_chance", chance: 5}, {condition: "minecraft:value_check", value: 0, range: 0}]}, {condition: "minecraft:reference", name: "test:l"}] run say aaa
+execute if predicate [{condition: "minecraft:value_check", name: "test:l", value: 0, range: {min: 0, max: 2}}, [{condition: "minecraft:value_check", name: "test:l", value: 0, range: {min: 1, max: 2}}]] run say bb
+```