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| author | Kathy Gray | 2013-11-28 17:07:32 +0000 |
|---|---|---|
| committer | Kathy Gray | 2013-11-28 17:07:32 +0000 |
| commit | dcc2ec2e4e6a3fd9a393af64d45bdf659201da03 (patch) | |
| tree | 86ae08b56d12ed2e073ea984daee637b3f1afbb1 /language/l2_parse.ott | |
| parent | 2b30446b6d2c5ae4accb7e4d00e9af5426990aee (diff) | |
Updated syntax with working examples
Diffstat (limited to 'language/l2_parse.ott')
| -rw-r--r-- | language/l2_parse.ott | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/language/l2_parse.ott b/language/l2_parse.ott index 6876fcfa..f96c3f99 100644 --- a/language/l2_parse.ott +++ b/language/l2_parse.ott @@ -118,6 +118,12 @@ id :: '' ::= | x :: :: id | ( deinfix x ) :: :: deIid {{ com remove infix status }} + +var :: '' ::= + {{ com variables with kind, ticked to differntiate from program variables }} + {{ aux _ l }} + | ' x :: :: var + % Note: we have just a single namespace. We don't want the same % identifier to be reused as a type name or variable, expression % variable, and field name. We don't enforce any lexical convention @@ -162,6 +168,7 @@ atyp :: 'ATyp_' ::= {{ com expressions of all kinds, to be translated to types, nats, orders, and effects after parsing }} {{ aux _ l }} | id :: :: id {{ com identifier }} + | var :: :: var {{ com ticked variable }} | num :: :: constant {{ com constant }} | atyp1 * atyp2 :: :: times {{ com product }} | atyp1 + atyp2 :: :: sum {{ com sum }} @@ -171,6 +178,7 @@ atyp :: 'ATyp_' ::= | inc :: :: inc {{ com increasing (little-endian) }} | dec :: :: dec {{ com decreasing (big-endian) }} | effect id :: :: efid + | effect var :: :: efvar | effect { efct1 , .. , efctn } :: :: set {{ com effect set }} | pure :: M :: pure {{ com sugar for empty effect set }} {{ icho [] }} @@ -237,8 +245,8 @@ nexp_constraint :: 'NC_' ::= kinded_id :: 'KOpt_' ::= {{ com optionally kind-annotated identifier }} {{ aux _ l }} - | id :: :: none {{ com identifier }} - | kind id :: :: kind {{ com kind-annotated variable }} + | var :: :: none {{ com identifier }} + | kind var :: :: kind {{ com kind-annotated variable }} quant_item :: 'QI_' ::= {{ com Either a kinded identifier or a nexp constraint for a typquant }} @@ -682,7 +690,7 @@ default_typing_spec :: 'DT_' ::= {{ com Default kinding or typing assumption }} {{ aux _ l }} % {{ aux _ annot }} {{ auxparam 'a }} - | default base_kind id :: :: kind + | default base_kind var :: :: kind | default typschm id :: :: typ % The intended semantics of these is that if an id in binding position % doesn't have a kind or type annotation, then we look through the |