tdpeuter/2025LogProg-project-GhentProlog
tdpeuter/2025LogProg-project-GhentProlog
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Tibo De Peuter 2025-05-04 21:50:58 +02:00
parent 5bfa1691dd
commit a85169dced
Signed by: tdpeuter
GPG key ID: 38297DE43F75FFE2
27 changed files with 377 additions and 250 deletions
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47
src/parser/grammars/TermsGrammar.kt
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@ -6,30 +6,32 @@ import com.github.h0tk3y.betterParse.parser.Parser
import prolog.ast.arithmetic.Float
import prolog.ast.arithmetic.Integer
import prolog.ast.terms.*
import prolog.builtins.Dynamic
/**
* Precedence is based on the following table:
*
* | Precedence | Type | Operators |
* |------------|------|-----------------------------------------------------------------------------------------------|
* | 1200 | xfx | --\>, :-, =\>, ==\> |
* | 1200 | fx | :-, ?- |
* | 1105 | xfy | \| |
* | 1100 | xfy | ; |
* | 1050 | xfy | -\>, \*-\> |
* | 1000 | xfy | , |
* | 990 | xfx | := |
* | 900 | fy | \\+ |
* | 700 | xfx | \<, =, =.., =:=, =\<, ==, =\\=, \>, \>=, \\=, \\==, as, is, \>:\<, :\< |
* | 600 | xfy | : |
* | 500 | yfx | +, -, /\\, \\/, xor |
* | 500 | fx | ? |
* | 400 | yfx | \*, /, //, div, rdiv, \<\<, \>\>, mod, rem |
* | 200 | xfx | \*\* |
* | 200 | xfy | ^ |
* | 200 | fy | +, -, \\ |
* | 100 | yfx | . |
* | 1 | fx | $ |
* | 1200 | xfx | --\>, :-, =\>, ==\> |
* | 1200 | fx | :-, ?- |
* | 1150 | fx | dynamic |
* | 1105 | xfy | | |
* | 1100 | xfy | ; |
* | 1050 | xfy | ->, *-> |
* | 1000 | xfy | , |
* | 990 | xfx | := |
* | 900 | fy | \+ |
* | 700 | xfx | <, =, =.., =:=, =<, ==, =\=, >, >=, \=, \==, as, is, >:<, :< |
* | 600 | xfy | : |
* | 500 | yfx | +, -, /\, \/, xor |
* | 500 | fx | ? |
* | 400 | yfx | *, /, //, div, rdiv, <<, >>, mod, rem |
* | 200 | xfx | ** |
* | 200 | xfy | ^ |
* | 200 | fy | +, -, \ |
* | 100 | yfx | . |
* | 1 | fx | $ |
*
* It is very easy to extend this grammar to support more operators. Just add them at the appropriate rule or create a
* new rule and chain it to the existing ones.
@ -58,6 +60,8 @@ open class TermsGrammar : Tokens() {
protected val int: Parser<Integer> by integerToken use { Integer(text.toInt()) }
protected val float: Parser<Float> by floatToken use { Float(text.toFloat()) }
protected val functor: Parser<String> by (nameToken * divide * int) use { "${t1.text}${t2.text}$t3" }
// Base terms (atoms, compounds, variables, numbers)
protected val baseTerm: Parser<Term> by (dummy
or (-leftParenthesis * parser(::term) * -rightParenthesis)
@ -98,8 +102,13 @@ open class TermsGrammar : Tokens() {
t2.fold(t1) { acc, (op, term) -> CompoundTerm(Atom(op), listOf(acc, term)) }
}
protected val dynamic: Parser<Term> by (dynamicOp * functor) use {
CompoundTerm( Atom(t1.text), listOf(Atom(t2)) )
}
protected val term1150: Parser<Term> by (dynamic or term1100) use { this }
protected val op1200: Parser<String> by (neck) use { text }
protected val term1200: Parser<Term> by (term1100 * zeroOrMore(op1200 * term1100)) use {
protected val term1200: Parser<Term> by (term1150 * zeroOrMore(op1200 * term1100)) use {
t2.fold(t1) { acc, (op, term) -> CompoundTerm(Atom(op), listOf(acc, term)) }
}