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(ns cljcc.token)
(def token-kind
#{:eof
:semicolon
;; brackets
:left-curly
:right-curly
:left-paren
:right-paren
;; operators
:multiply
:divide
:remainder
:plus
:minus
:logical-not
:logical-and
:logical-or
:equal-to
:not-equal-to
:less-than
:greater-than
:less-than-equal-to
:greater-than-equal-to
:bitwise-left-shift
:bitwise-right-shift
:ampersand
:bitwise-xor
:bitwise-or
:negate
:assignemnt
:increment
:decrement
:number
:identifier
;; keywords
:kw-return
:kw-int
:kw-void})
(def unary-ops
#{:logical-not
:complement
:hyphen})
(defn unary-op? [op]
(contains? unary-ops op))
(def bin-ops
"Binary operands and their precedence."
{:multiply 100
:divide 100
:remainder 100
:plus 90
:hyphen 90
:bitwise-left-shift 80
:bitwise-right-shift 80
:less-than 70
:less-than-equal-to 70
:greater-than 70
:greater-than-equal-to 70
:equal-to 60
:not-equal-to 60
:ampersand 50
:bitwise-xor 40
:bitwise-or 30
:logical-and 20
:logical-or 10})
(defn binary-op? [op]
(contains? bin-ops op))
(defn precedence [op]
(op bin-ops))
(def chrs-kind-map
{\( :left-paren
\) :right-paren
\{ :left-curly
\} :right-curly
\= :assignment
"--" :decrement
"++" :increment
"<<" :bitwise-left-shift
">>" :bitwise-right-shift
\! :logical-not
"&&" :logical-and
"||" :logical-or
"==" :equal-to
"!=" :not-equal-to
\< :less-than
\> :greater-than
"<=" :less-than-equal-to
">=" :greater-than-equal-to
\^ :bitwise-xor
\| :bitwise-or
\& :ampersand
\; :semicolon
\+ :plus
\- :hyphen
\~ :complement
\* :multiply
\% :remainder
\/ :divide})
(defn identifier->kind [identifier]
(case identifier
"return" :kw-return
"void" :kw-void
"int" :kw-int
:identifier))
(defn create
([kind line col]
{:kind kind
:line line
:col col})
([kind line col literal]
{:kind kind
:line line
:col col
:literal literal}))
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