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update grammar

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tocariimaa 2025-01-19 19:09:41 -03:00
parent 41589320de
commit b2c4a55544
1 changed files with 13 additions and 8 deletions
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21
docs/grammar.abnf
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@ -4,40 +4,45 @@
; - alternatives are ordered ; - alternatives are ordered
function-kind = "proc" / "iter" function-kind = "proc" / "iter"
proc-decl = function-kind "(" [proc-decl-args] ")" ":" [ident] *stmt 'end' proc-decl = function-kind ident ["*"] "(" [proc-decl-args] ")" [":" ident] *stmt 'end'
proc-decl-args = symbol-type-pair *("," symbol-type-pair) proc-decl-args = symbol-type-pair *("," symbol-type-pair)
symbol-type-pair = ident ":" ident symbol-type-pair = ident ":" ident
symbol-decl = ("var" / "let" / "const") ident-type-expr ; "Variable" declaration
ident-type-expr = ident [":" ident] ["=" expr] ident-type-expr = ident [":" ident] ["=" expr]
symbol-decl = ("var" / "let" / "const") ident-type-expr ; "Variable" declaration
function-call = ident-qualified "(" [funcargs] ")" function-call = ident-qualified "(" [funcargs] ")"
funcargs = expr-list funcargs = expr-list
array-literal = "[" expr-list "]" array-literal = "[" expr-list "]"
expr-list = expr *("," expr) [","] ; Allows a trailling comma expr-list = expr *("," expr) [","] ; Allows a trailling comma
expr = number expr = number
/ array-literal / array-literal
/ function-call / function-call
/ string-literal
pragma = "#" "[" "]" ; TODO pragma-directive = ident *("," ident) [","]
decorated-decl = pragma (proc-decl / symbol-decl) pragma = "#" "[" pragma-directive "]"
decorated-decl = pragma (proc-decl / symbol-decl)
; Statements ; Statements
while-stmt = "while" expr *stmt "end" while-stmt = "while" expr *stmt "end"
if-expr = "if" expr *stmt "end" if-expr = "if" expr *stmt "end"
break-expr = "break" *expr break-expr = "break" [expr]
return-stmt = "return" *expr return-stmt = "return" [expr]
yield-stmt = "yield" *expr yield-stmt = "yield" [expr]
discard-stmt = "discard" expr
loop-control = "next" / break-expr loop-control = "next" / break-expr
stmt = proc-decl stmt = proc-decl
/ symbol-decl
/ expr / expr
/ loop-control / loop-control
/ if-expr / if-expr
/ while-stmt / while-stmt
/ return-stmt / return-stmt
/ yield-stmt / yield-stmt
/ discard-stmt
ident = (ALPHA / "_") *(ALPHA / DIGIT / "_" / "?" / "!") ident = (ALPHA / "_") *(ALPHA / DIGIT / "_" / "?" / "!")
; Identifier accounting for namespacing: std:io.print, aaa:bbb:ccc ; Identifier accounting for namespacing: std:io.print, aaa:bbb:ccc