61 lines
2.1 KiB
Plaintext
61 lines
2.1 KiB
Plaintext
WHITESPACE = _{ " " | "\t" }
|
|
|
|
// TODO: Proper indentation and formatting
|
|
program = _{ SOI ~ expr ~ EOI }
|
|
|
|
expr = { atom ~ (infix ~ atom)* }
|
|
atom = _{ prefix? ~ primary ~ postfix? }
|
|
infix = _{ add | sub | mul | div | pow | paren }
|
|
add = { "+" } // Addition
|
|
sub = { "-" } // Subtraction
|
|
mul = { "*" } // Multiplication
|
|
div = { "/" } // Division
|
|
mod = { "%" } // Modulo
|
|
pow = { "^" } // Exponentiation
|
|
paren = { "" } // Implicit multiplication operator
|
|
|
|
prefix = _{ neg | sqrt }
|
|
neg = { "-" } // Negation
|
|
sqrt = { "sqrt" }
|
|
|
|
postfix = _{ fac }
|
|
fac = { "!" } // Factorial
|
|
|
|
primary = _{ ("(" ~ expr ~ ")") | lit | constant | fn_call | ident }
|
|
fn_call = { ident ~ "(" ~ expr ~ ("," ~ expr)* ~ ")" }
|
|
ident = @{ (ASCII_ALPHA | "_") ~ (ASCII_ALPHANUMERIC | "_")* }
|
|
lit = { unit | ((float | int) ~ unit?) }
|
|
|
|
float = @{ int ~ "." ~ int? ~ exp? | int ~ exp }
|
|
exp = _{ ^"e" ~ ("+" | "-")? ~ int }
|
|
int = @{ ASCII_DIGIT+ }
|
|
|
|
unit = ${ (scale ~ base_unit) | base_unit ~ !ident}
|
|
base_unit = _{ meter | second | gram }
|
|
meter = { "m" }
|
|
second = { "s" }
|
|
gram = { "g" }
|
|
|
|
scale = _{ nano | micro | milli | centi | deci | deca | hecto | kilo | mega | giga | tera }
|
|
nano = { "n" }
|
|
micro = { "µ" | "u" }
|
|
milli = { "m" }
|
|
centi = { "c" }
|
|
deci = { "d" }
|
|
deca = { "da" }
|
|
hecto = { "h" }
|
|
kilo = { "k" }
|
|
mega = { "M" }
|
|
giga = { "G" }
|
|
tera = { "T" }
|
|
|
|
// Constants
|
|
constant = { infinity | imaginary_unit | pi | tau | euler_number | golden_ratio | gravity_acceleration }
|
|
infinity = { "inf" | "INF" | "infinity" | "INFINITY" | "∞" }
|
|
imaginary_unit = { "i" | "I" }
|
|
pi = { "pi" | "PI" | "π" }
|
|
tau = { "tau" | "TAU" | "τ" }
|
|
euler_number = { "e" }
|
|
golden_ratio = { "phi" | "PHI" | "φ" }
|
|
gravity_acceleration = { "G" }
|