sjs/compiler
1
0
Fork 0
mirror of https://github.com/samsonjs/compiler.git synced 2026-03-25 08:45:52 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

op precedence pseudo-bnf

Browse source
This commit is contained in:
Sami Samhuri 2010-02-14 18:55:51 -08:00
parent 5940ac99c0
commit 9667c21e8b
1 changed files with 25 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
op-precedence.txt Normal file
View file

@ -0,0 +1,25 @@
keyword := 'if' | 'while' | 'until' | 'repeat' | 'for' | 'do' | 'break' |
'print' | 'else' | 'end'
identifier := /[a-zA-Z][[:alnum:]]+/
number := /\d+/
boolean-literal := 'true' | 'false'
factor := '(' boolean-expression ')' | identifier | number
signed-factor := '-' factor | '+' factor | factor
term := signed-factor (/[*/]/ signed-factor)*
arithmetic-expression := term (/[-+]/ term)*
bit-op := '|' | '&' | '^'
bit-expression := arithmetic-expression (bit-op arithmetic-expression)*
rel-op := '==' | '!=' | '>' | '>=' | '<' | '<='
relation := bit-expression (rel-op bit-expression)*
boolean-factor := boolean-literal | relation
not-factor := '!' boolean-factor | boolean-factor
boolean-term := not-factor ('&&' not-factor)*
boolean-expression := boolean-term ('||' boolean-term)*
assignment := identifier '=' boolean-expression
expression := assignment | boolean-expression