debug variant parsing

blueprintcompiler/language/values.py

@@ -28,6 +28,10 @@ from .gobject_object import Object
 from .types import TypeName
 from .variant import VarContent
 
+import gi
+gi.require_version("GLib", "2.0")
+from gi.repository import GLib
+
 
 class Translated(AstNode):
     grammar = AnyOf(
@@ -373,8 +377,17 @@ class IdentLiteral(AstNode):
             return None
 
 
+        
 class VariantValue(AstNode):
-    grammar = ["variant", "<", UseQuoted("type"), ">", "(", VarContent, ")"]
+    grammar = [
+        "variant",
+        "<",
+        UseQuoted("type"),
+        ">",
+        "(",
+        Err(VarContent, "Invalid variant content!"),
+        ")",
+    ]
 
     @property
     def var_type(self) -> str:
@@ -407,6 +420,24 @@ class VariantValue(AstNode):
             raise CompileError(f"Cannot convert variant into {expected_type.full_name}")
         pass
 
+    @validate("type")
+    def validate_type(self):
+        if not GLib.VariantType.string_is_valid(self.var_type):
+            raise CompileError(f"`{self.var_type}` is not a valid variant type")
+    
+    @validate()
+    def validate_content(self):
+        if not GLib.VariantType.string_is_valid(self.var_type):
+            return
+
+        try:
+            var_ty = GLib.VariantType.new(self.var_type)
+            var_val = GLib.Variant.parse(var_ty, self.var_value)
+        except GLib.GError as error:
+            raise CompileError(f"Variant did not match specified type: {error}")
+
+        pass
+
 
 class Literal(AstNode):
     grammar = AnyOf(

blueprintcompiler/language/variant.py

@@ -38,7 +38,7 @@ class VarContentString(AstNode):
 
     @property
     def content(self) -> str:
-        return self.tokens["value"]
+        return utils.escape_quote(self.tokens["value"])
 
 
 class VarContentNumber(AstNode):
@@ -80,7 +80,10 @@ class VarContentDict(AstNode):
 
     @property
     def content(self) -> str:
-        inner = ", ".join(child.content for child in self.children)
+        inner = ", ".join(
+            f"{key.content}: {value.content}"
+            for (key, value) in utils.iter_batched(self.children, 2, strict=True)
+        )
         return f"{{{inner}}}"
 
 

blueprintcompiler/utils.py

@@ -19,6 +19,7 @@
 
 import typing as T
 from dataclasses import dataclass
+import itertools
 
 
 class Colors:
@@ -154,3 +155,17 @@ def unescape_quote(string: str) -> str:
         i += 1
 
     return result
+
+def iter_batched(iterable, n, *, strict=False):
+    """
+    Replacement for `itertools.batched()` since the testing infrastructure
+    uses Python 3.9 at the moment. Copied directly off of the Python docs.
+    """
+    # batched('ABCDEFG', 3) → ABC DEF G
+    if n < 1:
+        raise ValueError('n must be at least one')
+    iterator = iter(iterable)
+    while batch := tuple(itertools.islice(iterator, n)):
+        if strict and len(batch) != n:
+            raise ValueError('batched(): incomplete batch')
+        yield batch