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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,317 @@ | ||
| {- | | ||
| LamagraphML syntax | ||
| -} | ||
| module Lamagraph.Compiler.Syntax ( | ||
| -- * Grammar rules | ||
| -- $rules | ||
|
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| -- * Lexical conventions | ||
|
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| -- ** Blanks | ||
| -- $lexing_blanks | ||
|
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| -- ** Comments | ||
| -- $lexing_comments | ||
|
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| -- ** Identifiers | ||
| -- $lexing_idents | ||
|
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| -- ** Integer literals | ||
| -- $lexing_int_lits | ||
|
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| -- ** Character literals | ||
| -- $lexing_char_lits | ||
|
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| -- ** String literals | ||
| -- $lexing_string_lits | ||
|
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| -- ** Operators | ||
| -- $lexing_operators | ||
|
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| -- ** Keywords | ||
| -- $lexing_keywords | ||
|
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| -- * Names | ||
| -- $names | ||
|
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| -- * Type expressions | ||
| -- $types | ||
|
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| -- * Constants | ||
| -- $constants | ||
|
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| -- * Patterns | ||
| -- $patterns | ||
|
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| -- * Expressions | ||
| -- $expressions | ||
|
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| -- * Type definitions | ||
| -- $typedefs | ||
|
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| -- * Declarations and Modules | ||
| -- $decls | ||
|
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||
| -- * Missing things | ||
| -- $missing | ||
| ) where | ||
|
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| {- $rules | ||
| Grammar rules are written in monospace font. | ||
| Italicized words represent @/nonterminals/@. | ||
| @Terminals@ are written in upright font. | ||
| @( )@ mean grouping, @{ }@ mean zero or more repetitions, @[ ]@ mean optional. | ||
| In case of clash between grammar and terminal meaning, terminal symbol will be typeset as @__bold monospace__@. | ||
| -} | ||
|
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| {- $lexing_blanks | ||
| Spaces, tabs, @\\n@ and @\\r@ are ignored and are used to separate tokens. | ||
| -} | ||
|
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||
| {- $lexing_comments | ||
| Single-line comments use @--@ syntax and consume ALL characters until line break. | ||
| Multiline comments must be enclosed in @(*@ and @*)@. | ||
| Nesting is allowed and must be handled. | ||
| Note that the following code won't be treated as a valid multiline comment! | ||
| @ | ||
| -- (* | ||
| *) | ||
| @ | ||
| -} | ||
|
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| {- $lexing_idents | ||
| @ | ||
| /ident/ ::= /letter/ { /letter/ | 0...9 | _ | ' } | ||
| /capitalized-ident/ ::= ( A...Z ) { /letter/ | 0...9 | _ | ' } | ||
| /lowercase-ident/ ::= ( a...z | _ ) { /letter/ | 0...9 | _ | ' } | ||
| /letter/ ::= A...Z | a...z | ||
| @ | ||
| -} | ||
|
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||
| {- $lexing_int_lits | ||
| @ | ||
| /integer-literal/ ::= \[-] ( 0...9 ) { 0...9 | _ } | ||
| /int32-literal/ ::= /integer-literal/ l | ||
| /uint32-literal/ ::= /integer-literal/ ul | ||
| /int64-literal/ ::= /integer-literal/ L | ||
| /uint64-literal/ ::= /integer-literal/ UL | ||
| @ | ||
| -} | ||
|
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||
| {- $lexing_char_lits | ||
| @ | ||
| /char-literal/ ::= ' /regular-char/ ' | ||
| | ' /escape-sequence/ ' | ||
| /escape-sequence/ ::= \\ ( __|__ | " | ' | n ) | ||
| @ | ||
| @/regular-char/@ must match every printable ASCII character (decimal range: 32-126). | ||
| -} | ||
|
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| {- $lexing_string_lits | ||
| @ | ||
| /string-literal/ ::= " { /string-character/ } " | ||
| /string-character/ ::= /regular-string-character/ | ||
| | /escape-sequence/ | ||
| @ | ||
| @/regular-string-character/@ must match every printable ASCII character (decimal range: 32-126). | ||
| -} | ||
|
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||
| {- $lexing_operators | ||
| @ | ||
| /infix-symbol/ ::= ( = | \< | \> | @ | ^ | __|__ | & | + | - | * | \/ | $ | % ) { /operator-char/ } | ||
| /prefix-symbol/ ::= ! { /operator-char/ } | ||
| | ( ? | ~ ) { /operator-char/ }+ | ||
| /operator-char/ ::= ! | $ | % | & | * | + | . | / | : | \< | = | \> | ? | \@ | ^ | __|__ | ~ | ||
| @ | ||
| Copypasted from https://askra.de/software/ocaml-doc/4.02/lex.html#sec71, probably too complicated. | ||
| -} | ||
|
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||
| {- $lexing_keywords | ||
| Keyword table: | ||
| @ | ||
| and asr else false fun if in land let | ||
| lor lsl lsr lxor match mod module | ||
| of open rec then true type when with | ||
| != && ' ( ) * + , - -> : :: ; < = > [ ] | ||
| _ { | } . | ||
| @ | ||
| -} | ||
|
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| {- $names | ||
| Basic names | ||
| @ | ||
| /value-name/ ::= /lowercase-ident/ | ||
| | __(__ /operator-name/ __)__ | ||
| /operator-name/ ::= /prefix-symbol/ | /infix-op/ | ||
| /infix-op/ ::= /infix-symbol/ | ||
| | * | + | - | = | != | \< | \> | || | && | ||
| | mod | land | lor | lxor | lsl | lsr | asr | ||
| /constr-name/ ::= /capitalized-ident/ | ||
| /typeconstr-name/ ::= /lowercase-ident/ | ||
| /module-name/ ::= /capitalized-ident/ | ||
| @ | ||
| Qualified names | ||
| @ | ||
| /value-path/ ::= [ /module-path/ . ] /value-name/ | ||
| /constr/ ::= [ /module-path/ . ] /constr-name/ | ||
| /typeconstr/ ::= [ /module-path/ . ] /typeconstr-name/ | ||
| /module-path/ ::= /module-name/ { . /module-name/ } | ||
| @ | ||
| -} | ||
|
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| {- $types | ||
| @ | ||
| /typexpr/ ::= ' /ident/ | ||
| | __(__ /typexpr/ __)__ | ||
| | /typexpr/ -> /typexpr/ | ||
| | /typexpr/ { * /typexpr/}+ | ||
| | /typeconstr/ | ||
| | /typexpr/ /typeconstr/ | ||
| | __(__ /typexpr/ {, /typexpr/} __)__ /typeconstr/ | ||
| @ | ||
| -} | ||
|
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| {- $constants | ||
| @ | ||
| /constant/ ::= /integer-literal/ | ||
| | /int32-literal/ | ||
| | /uint32-literal/ | ||
| | /int64-literal/ | ||
| | /uint64-literal/ | ||
| | /char-literal/ | ||
| | /string-literal/ | ||
| | /constr/ | ||
| | false | ||
| | true | ||
| | __()__ | ||
| | __[]__ | ||
| @ | ||
| -} | ||
|
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| {- $patterns | ||
| @ | ||
| /pattern/ ::= /value-name/ | ||
| | _ | ||
| | /constant/ | ||
| | __(__ /pattern/ __)__ | ||
| | __(__ /pattern/ : /typexpr/ __)__ | ||
| | /pattern/ __|__ /pattern/ | ||
| | /constr/ /pattern/ | ||
| | /pattern/ { , /pattern/ } | ||
| | __[__ /pattern/ { ; /pattern/ } [;] __]__ | ||
| | /pattern/ :: /pattern/ | ||
| @ | ||
| -} | ||
|
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| {- $expressions | ||
| @ | ||
| /expr/ ::= /value-path/ | ||
| | /constant/ | ||
| | __(__ /expr/ __)__ | ||
| | __(__ /expr/ : /typexpr/ __)__ | ||
| | /expr/ {, /expr/ } | ||
| | /constr/ /expr/ | ||
| | /expr/ :: /expr/ | ||
| | __[__ /expr/ { ; /expr/ } [;] ] | ||
| | /expr/ { /argument/ }+ | ||
| | /prefix-symbol/ /expr/ | ||
| | - /expr/ | ||
| | /expr/ /infix-op/ /expr/ | ||
| | if /expr/ then /expr/ else /expr/ | ||
| | match /expr/ with /pattern-matching/ | ||
| | fun { /parameter/ }+ [ : /typexpr/ ] -> /expr/ | ||
| | let [rec] /let-binding/ { and /let-binding/ } in /expr/ | ||
| /argument/ ::= /expr/ | ||
| /pattern-matching/ ::= [ __|__ ] /pattern/ [ when /expr/ ] -> /expr/ { __|__ /pattern/ [ when /expr/ ] -> /expr/ } | ||
| /let-binding/ ::= /pattern/ = /expr/ | ||
| | /value-name/ { /parameter/ } [ : /typexpr/ ] = /expr/ | ||
| /parameter/ ::= /pattern/ | ||
| @ | ||
| -} | ||
|
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| {- $typedefs | ||
| @ | ||
| /type-definition/ ::= type /typedef/ { and /typedef/ } | ||
| /typedef/ ::= [ /type-params/ ] /typeconstr-name/ /type-information/ | ||
| /type-information/ ::= [ /type-equation/ ] [ /type-representation/ ] | ||
| /type-equation/ ::= = /typexpr/ | ||
| /type-representation/ ::= = [ __|__ ] /constr-decl/ { __|__ /constr-decl/ } | ||
| | = __|__ | ||
| /type-params/ ::= /type-param/ | ||
| | __(__ /type-param/ {, /type-param/ } __)__ | ||
| /type-param/ ::= ' /ident/ | ||
| /constr-decl/ ::= ( /constr-name/ | __[]__ | __(__::__)__ ) [ of /constr-args/ ] | ||
| /constr-args/ ::= /typexpr/ { * /typexpr/ } | ||
| @ | ||
| -} | ||
|
|
||
| {- $decls | ||
| @ | ||
| /module-definition/ ::= module /module-path/ | ||
| /open-decl/ ::= open /module-path/ | ||
| /decl/ ::= /expr/ | /type-definition/ | /open-decl/ | ||
| /prog/ ::= [ /module-definition/ ] { /decl/ } | ||
| @ | ||
| -} | ||
|
|
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| {- $missing | ||
| For the sake of simplicity this language currently lacks these know to the authors features: | ||
| * Multiline strings | ||
| * Less useful escape sequences like @\\t@ | ||
| * Records | ||
| * Float numbers | ||
| * @function@ keyword | ||
| -} |