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extend concrete syntax: edge can be defined as (src -> tgt) OR (tgt <- src)

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This commit is contained in:
Joeri Exelmans 2024-12-04 15:49:02 +01:00
parent 5c3026d1f6
commit 838bb18630
1 changed files with 7 additions and 2 deletions
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9
concrete_syntax/textual_od/parser.py
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@ -33,9 +33,10 @@ INDENTED_CODE: /```[^`]*```/
type_name: IDENTIFIER
# name (optional) type
object: [IDENTIFIER] ":" type_name [link_spec] ["{" slot* "}"]
object: [IDENTIFIER] ":" type_name [link_spec | rev_link_spec] ["{" slot* "}"]
link_spec: "(" IDENTIFIER "->" IDENTIFIER ")"
link_spec: "(" IDENTIFIER "->" IDENTIFIER ")"
rev_link_spec: "(" IDENTIFIER "<-" IDENTIFIER ")"
slot: IDENTIFIER "=" literal ";"
"""
@ -64,6 +65,10 @@ def parse_od(state, m_text, mm, type_transform=lambda type_name: type_name):
[src, tgt] = el
return (src, tgt)
def rev_link_spec(self, el):
[tgt, src] = el # <-- reversed :)
return (src, tgt)
def type_name(self, el):
type_name = el[0]
if type_name in primitive_types: