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Valk Richard Li
2020-01-21 16:13:06 +08:00
committed by GitHub
parent 95d2017e0f
commit 7474930712
7 changed files with 467 additions and 22 deletions
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version2.0/parse.ebnf
+6 -11
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@@ -26,7 +26,6 @@
| <vector>
| <func> <id>
| <function>
| <assignment>
| '(' <calculation> ')'
| <scalar> { ('[' {<calculation> ','} ']') | ('[' <calculation> ':' [<calculation>] ']') | ('.' <id>) | ('(' {<calculation> ','} ')') | ('(' {<id> ':' <calculation> ','} ')') }
;
@@ -55,13 +54,9 @@
<definition> =
<var> <id> '=' <scalar>
| <var> '(' {<id> ','} ')' '=' (<scalar> | '(' {<scalar> ','} ')')
| '(' <var> {<id> ','} ')' '=' (<scalar> | '(' {<scalar> ','} ')')
;
<forindex_loop_definition> =
<var> <id>
;
<foreach_loop_definition> =
<var> <id>
;
<assignment> =
<scalar> ('=' | '+=' | '-=' | '*=' | '/=' | '~=') <calculation>
| '(' {<scalar> ','} ')' ('=' | '+=' | '-=' | '*=' | '/=' | '~=') (<calculation> | '(' {<calculation> ','} ')')
@@ -82,12 +77,12 @@
;
(* in forindex and foreach the scalar and definition cannot be lacked*)
<forindex_loop> =
<forindex> '(' <forindex_loop_definition> ';' <scalar> ')' <statement> [';']
| <forindex> '(' <forindex_loop_definition> ';' <scalar> ')' '{' {<statement> ';'} '}'
<forindex> '(' (<var> <id>)|(<id>) ';' <scalar> ')' <statement> [';']
| <forindex> '(' (<var> <id>)|(<id>) ';' <scalar> ')' '{' {<statement> ';'} '}'
;
<foreach_loop> =
<foreach> '(' <foreach_loop_definition> ';' <scalar> ')' <statement> [';']
| <foreach> '(' <foreach_loop_definition> ';' <scalar> ')' '{' {<statement> ';'} '}'
<foreach> '(' (<var> <id>)|(<id>) ';' <scalar> ')' <statement> [';']
| <foreach> '(' (<var> <id>)|(<id>) ';' <scalar> ')' '{' {<statement> ';'} '}'
;
<choose_expr> = <choose_expr_if> {<choose_expr_elsif>} [<choose_expr_else>]