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parser: Shorter code for groups

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Add a "grammar" property on AstNode types so they can be used in grammar
expressions as groups
This commit is contained in:
James Westman 2022-01-17 00:04:26 -06:00
parent 8d587b62a0
commit 76f7befd68
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GPG key ID: CE2DBA0ADB654EA6
10 changed files with 119 additions and 159 deletions
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13
blueprintcompiler/ast.py
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@ -23,6 +23,7 @@ from .ast_utils import *
from .errors import CompileError, CompilerBugError, MultipleErrors
from . import gir
from .lsp_utils import Completion, CompletionItemKind, SemanticToken, SemanticTokenType
from .parse_tree import *
from .tokenizer import Token
from .utils import lazy_prop
from .xml_emitter import XmlEmitter
@ -99,6 +100,12 @@ class UI(AstNode):
class GtkDirective(AstNode):
grammar = Statement(
Match("using").err("File must start with a \"using Gtk\" directive (e.g. `using Gtk 4.0;`)"),
Match("Gtk").err("File must start with a \"using Gtk\" directive (e.g. `using Gtk 4.0;`)"),
UseNumberText("version").expected("a version number for GTK"),
)
@validate("version")
def gtk_version(self):
if self.tokens["version"] not in ["4.0"]:
@ -120,6 +127,12 @@ class GtkDirective(AstNode):
class Import(AstNode):
grammar = Statement(
"using",
UseIdent("namespace").expected("a GIR namespace"),
UseNumberText("version").expected("a version number"),
)
@validate("namespace", "version")
def namespace_exists(self):
gir.get_namespace(self.tokens["namespace"], self.tokens["version"])