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Simple Expression Parsing with Antlr and Simple String Splitting #1703

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Simple Expression Parsing with Antlr and Simple String Splitting #1703

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07c477c
Simple Expression Parsing with Antlr and Simple String Splitting
ralikio Jan 31, 2025
dadfbf0
Test Validation
ralikio Feb 2, 2025
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29 changes: 29 additions & 0 deletions RuleLexer.g4
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// DELETE THIS CONTENT IF YOU PUT COMBINED GRAMMAR IN Parser TAB
lexer grammar RuleLexer;

EQ : '=' ;
COMMA : ',' ;
LPAREN : '(' ;
RPAREN : ')' ;
ARROW : '->' ;
ASTERIX : '*' ;

WS: [ \t\n\r\f]+ -> skip ;

// TODO: fill in missing plans
PLAN: 'azure'
| 'azure_lite'
| 'aws'
| 'gcp'
| 'trial'
| 'free'
| 'sap-converged-cloud'
;

PR: 'PR';
HR: 'HR';

S: 'S';
EU: 'EU';

VAL: [a-zA-Z_-]*[a-zA-Z_0-9]+;
48 changes: 48 additions & 0 deletions RuleParser.g4
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grammar RuleParser;
options { tokenVocab=RuleLexer; }

ruleEntry
: entry EOF
;

entry: PLAN
| PLAN ARROW outputAttrList
| PLAN inputAttrInParen
| PLAN inputAttrInParen ARROW outputAttrList
;

inputAttrInParen: LPAREN RPAREN
| LPAREN inputAttrList RPAREN
;

inputAttrList: inputAttrVal
| inputAttrVal COMMA inputAttrList
;

outputAttrList: outputAttrVal
| outputAttrVal COMMA outputAttrList
;

inputAttrVal: prVal
| hrVal
;

outputAttrVal: s
| eu
;

prVal: pr EQ val;

hrVal: hr EQ val;

pr: PR;

hr: HR;

s: S;

eu: EU;

val: VAL
| ASTERIX
;
39 changes: 39 additions & 0 deletions common/hyperscaler/rules/evaluator.go
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package rules

type Evaluator struct {
rules []*Rule
}

func NewEvaluator(parser Parser) *Evaluator {
return &Evaluator{

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// rules: parser.Parse(),
}
}

/**
* Validate rules.
*/
func (e *Evaluator) Validate() bool {
return true
}

/**
* Evaluate rules and output search labels.
*/
func (e *Evaluator) Evaluate( /*srk*/ ) string {
matchedRules := e.findMatchedRules( /*srk*/ )

// sort rules by priority
matchedRules = e.sortRules(matchedRules)

// apply one found rule
return matchedRules[0].Labels()
}

func (e *Evaluator) sortRules(matchedRules []*Rule) []*Rule {
panic("unimplemented")
}

func (e *Evaluator) findMatchedRules() []*Rule {
panic("unimplemented")
}
56 changes: 56 additions & 0 deletions common/hyperscaler/rules/grammar/antlr/RuleLexer.interp
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token literal names:
null
'='
','
'('
')'
'->'
'*'
null
null
'PR'
'HR'
'S'
'EU'
null

token symbolic names:
null
EQ
COMMA
LPAREN
RPAREN
ARROW
ASTERIX
WS
PLAN
PR
HR
S
EU
VAL

rule names:
EQ
COMMA
LPAREN
RPAREN
ARROW
ASTERIX
WS
PLAN
PR
HR
S
EU
VAL

channel names:
DEFAULT_TOKEN_CHANNEL
HIDDEN

mode names:
DEFAULT_MODE

atn:
[4, 0, 13, 120, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 1, 0, 1, 0, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 3, 1, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 6, 4, 6, 42, 8, 6, 11, 6, 12, 6, 43, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 3, 7, 97, 8, 7, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 1, 12, 5, 12, 111, 8, 12, 10, 12, 12, 12, 114, 9, 12, 1, 12, 4, 12, 117, 8, 12, 11, 12, 12, 12, 118, 0, 0, 13, 1, 1, 3, 2, 5, 3, 7, 4, 9, 5, 11, 6, 13, 7, 15, 8, 17, 9, 19, 10, 21, 11, 23, 12, 25, 13, 1, 0, 3, 3, 0, 9, 10, 12, 13, 32, 32, 4, 0, 45, 45, 65, 90, 95, 95, 97, 122, 4, 0, 48, 57, 65, 90, 95, 95, 97, 122, 128, 0, 1, 1, 0, 0, 0, 0, 3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 7, 1, 0, 0, 0, 0, 9, 1, 0, 0, 0, 0, 11, 1, 0, 0, 0, 0, 13, 1, 0, 0, 0, 0, 15, 1, 0, 0, 0, 0, 17, 1, 0, 0, 0, 0, 19, 1, 0, 0, 0, 0, 21, 1, 0, 0, 0, 0, 23, 1, 0, 0, 0, 0, 25, 1, 0, 0, 0, 1, 27, 1, 0, 0, 0, 3, 29, 1, 0, 0, 0, 5, 31, 1, 0, 0, 0, 7, 33, 1, 0, 0, 0, 9, 35, 1, 0, 0, 0, 11, 38, 1, 0, 0, 0, 13, 41, 1, 0, 0, 0, 15, 96, 1, 0, 0, 0, 17, 98, 1, 0, 0, 0, 19, 101, 1, 0, 0, 0, 21, 104, 1, 0, 0, 0, 23, 106, 1, 0, 0, 0, 25, 112, 1, 0, 0, 0, 27, 28, 5, 61, 0, 0, 28, 2, 1, 0, 0, 0, 29, 30, 5, 44, 0, 0, 30, 4, 1, 0, 0, 0, 31, 32, 5, 40, 0, 0, 32, 6, 1, 0, 0, 0, 33, 34, 5, 41, 0, 0, 34, 8, 1, 0, 0, 0, 35, 36, 5, 45, 0, 0, 36, 37, 5, 62, 0, 0, 37, 10, 1, 0, 0, 0, 38, 39, 5, 42, 0, 0, 39, 12, 1, 0, 0, 0, 40, 42, 7, 0, 0, 0, 41, 40, 1, 0, 0, 0, 42, 43, 1, 0, 0, 0, 43, 41, 1, 0, 0, 0, 43, 44, 1, 0, 0, 0, 44, 45, 1, 0, 0, 0, 45, 46, 6, 6, 0, 0, 46, 14, 1, 0, 0, 0, 47, 48, 5, 97, 0, 0, 48, 49, 5, 122, 0, 0, 49, 50, 5, 117, 0, 0, 50, 51, 5, 114, 0, 0, 51, 97, 5, 101, 0, 0, 52, 53, 5, 97, 0, 0, 53, 54, 5, 122, 0, 0, 54, 55, 5, 117, 0, 0, 55, 56, 5, 114, 0, 0, 56, 57, 5, 101, 0, 0, 57, 58, 5, 95, 0, 0, 58, 59, 5, 108, 0, 0, 59, 60, 5, 105, 0, 0, 60, 61, 5, 116, 0, 0, 61, 97, 5, 101, 0, 0, 62, 63, 5, 97, 0, 0, 63, 64, 5, 119, 0, 0, 64, 97, 5, 115, 0, 0, 65, 66, 5, 103, 0, 0, 66, 67, 5, 99, 0, 0, 67, 97, 5, 112, 0, 0, 68, 69, 5, 116, 0, 0, 69, 70, 5, 114, 0, 0, 70, 71, 5, 105, 0, 0, 71, 72, 5, 97, 0, 0, 72, 97, 5, 108, 0, 0, 73, 74, 5, 102, 0, 0, 74, 75, 5, 114, 0, 0, 75, 76, 5, 101, 0, 0, 76, 97, 5, 101, 0, 0, 77, 78, 5, 115, 0, 0, 78, 79, 5, 97, 0, 0, 79, 80, 5, 112, 0, 0, 80, 81, 5, 45, 0, 0, 81, 82, 5, 99, 0, 0, 82, 83, 5, 111, 0, 0, 83, 84, 5, 110, 0, 0, 84, 85, 5, 118, 0, 0, 85, 86, 5, 101, 0, 0, 86, 87, 5, 114, 0, 0, 87, 88, 5, 103, 0, 0, 88, 89, 5, 101, 0, 0, 89, 90, 5, 100, 0, 0, 90, 91, 5, 45, 0, 0, 91, 92, 5, 99, 0, 0, 92, 93, 5, 108, 0, 0, 93, 94, 5, 111, 0, 0, 94, 95, 5, 117, 0, 0, 95, 97, 5, 100, 0, 0, 96, 47, 1, 0, 0, 0, 96, 52, 1, 0, 0, 0, 96, 62, 1, 0, 0, 0, 96, 65, 1, 0, 0, 0, 96, 68, 1, 0, 0, 0, 96, 73, 1, 0, 0, 0, 96, 77, 1, 0, 0, 0, 97, 16, 1, 0, 0, 0, 98, 99, 5, 80, 0, 0, 99, 100, 5, 82, 0, 0, 100, 18, 1, 0, 0, 0, 101, 102, 5, 72, 0, 0, 102, 103, 5, 82, 0, 0, 103, 20, 1, 0, 0, 0, 104, 105, 5, 83, 0, 0, 105, 22, 1, 0, 0, 0, 106, 107, 5, 69, 0, 0, 107, 108, 5, 85, 0, 0, 108, 24, 1, 0, 0, 0, 109, 111, 7, 1, 0, 0, 110, 109, 1, 0, 0, 0, 111, 114, 1, 0, 0, 0, 112, 110, 1, 0, 0, 0, 112, 113, 1, 0, 0, 0, 113, 116, 1, 0, 0, 0, 114, 112, 1, 0, 0, 0, 115, 117, 7, 2, 0, 0, 116, 115, 1, 0, 0, 0, 117, 118, 1, 0, 0, 0, 118, 116, 1, 0, 0, 0, 118, 119, 1, 0, 0, 0, 119, 26, 1, 0, 0, 0, 5, 0, 43, 96, 112, 118, 1, 6, 0, 0]
23 changes: 23 additions & 0 deletions common/hyperscaler/rules/grammar/antlr/RuleLexer.tokens
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EQ=1
COMMA=2
LPAREN=3
RPAREN=4
ARROW=5
ASTERIX=6
WS=7
PLAN=8
PR=9
HR=10
S=11
EU=12
VAL=13
'='=1
','=2
'('=3
')'=4
'->'=5
'*'=6
'PR'=9
'HR'=10
'S'=11
'EU'=12
51 changes: 51 additions & 0 deletions common/hyperscaler/rules/grammar/antlr/RuleParser.interp
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token literal names:
null
'='
','
'('
')'
'->'
'*'
null
null
'PR'
'HR'
'S'
'EU'
null

token symbolic names:
null
EQ
COMMA
LPAREN
RPAREN
ARROW
ASTERIX
WS
PLAN
PR
HR
S
EU
VAL

rule names:
ruleEntry
entry
inputAttrInParen
inputAttrList
outputAttrList
inputAttrVal
outputAttrVal
prVal
hrVal
pr
hr
s
eu
val


atn:
[4, 1, 13, 93, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 43, 8, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 51, 8, 2, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 3, 3, 58, 8, 3, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 3, 4, 65, 8, 4, 1, 5, 1, 5, 3, 5, 69, 8, 5, 1, 6, 1, 6, 3, 6, 73, 8, 6, 1, 7, 1, 7, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 10, 1, 10, 1, 11, 1, 11, 1, 12, 1, 12, 1, 13, 1, 13, 1, 13, 0, 0, 14, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 0, 1, 2, 0, 6, 6, 13, 13, 86, 0, 28, 1, 0, 0, 0, 2, 42, 1, 0, 0, 0, 4, 50, 1, 0, 0, 0, 6, 57, 1, 0, 0, 0, 8, 64, 1, 0, 0, 0, 10, 68, 1, 0, 0, 0, 12, 72, 1, 0, 0, 0, 14, 74, 1, 0, 0, 0, 16, 78, 1, 0, 0, 0, 18, 82, 1, 0, 0, 0, 20, 84, 1, 0, 0, 0, 22, 86, 1, 0, 0, 0, 24, 88, 1, 0, 0, 0, 26, 90, 1, 0, 0, 0, 28, 29, 3, 2, 1, 0, 29, 30, 5, 0, 0, 1, 30, 1, 1, 0, 0, 0, 31, 43, 5, 8, 0, 0, 32, 33, 5, 8, 0, 0, 33, 34, 5, 5, 0, 0, 34, 43, 3, 8, 4, 0, 35, 36, 5, 8, 0, 0, 36, 43, 3, 4, 2, 0, 37, 38, 5, 8, 0, 0, 38, 39, 3, 4, 2, 0, 39, 40, 5, 5, 0, 0, 40, 41, 3, 8, 4, 0, 41, 43, 1, 0, 0, 0, 42, 31, 1, 0, 0, 0, 42, 32, 1, 0, 0, 0, 42, 35, 1, 0, 0, 0, 42, 37, 1, 0, 0, 0, 43, 3, 1, 0, 0, 0, 44, 45, 5, 3, 0, 0, 45, 51, 5, 4, 0, 0, 46, 47, 5, 3, 0, 0, 47, 48, 3, 6, 3, 0, 48, 49, 5, 4, 0, 0, 49, 51, 1, 0, 0, 0, 50, 44, 1, 0, 0, 0, 50, 46, 1, 0, 0, 0, 51, 5, 1, 0, 0, 0, 52, 58, 3, 10, 5, 0, 53, 54, 3, 10, 5, 0, 54, 55, 5, 2, 0, 0, 55, 56, 3, 6, 3, 0, 56, 58, 1, 0, 0, 0, 57, 52, 1, 0, 0, 0, 57, 53, 1, 0, 0, 0, 58, 7, 1, 0, 0, 0, 59, 65, 3, 12, 6, 0, 60, 61, 3, 12, 6, 0, 61, 62, 5, 2, 0, 0, 62, 63, 3, 8, 4, 0, 63, 65, 1, 0, 0, 0, 64, 59, 1, 0, 0, 0, 64, 60, 1, 0, 0, 0, 65, 9, 1, 0, 0, 0, 66, 69, 3, 14, 7, 0, 67, 69, 3, 16, 8, 0, 68, 66, 1, 0, 0, 0, 68, 67, 1, 0, 0, 0, 69, 11, 1, 0, 0, 0, 70, 73, 3, 22, 11, 0, 71, 73, 3, 24, 12, 0, 72, 70, 1, 0, 0, 0, 72, 71, 1, 0, 0, 0, 73, 13, 1, 0, 0, 0, 74, 75, 3, 18, 9, 0, 75, 76, 5, 1, 0, 0, 76, 77, 3, 26, 13, 0, 77, 15, 1, 0, 0, 0, 78, 79, 3, 20, 10, 0, 79, 80, 5, 1, 0, 0, 80, 81, 3, 26, 13, 0, 81, 17, 1, 0, 0, 0, 82, 83, 5, 9, 0, 0, 83, 19, 1, 0, 0, 0, 84, 85, 5, 10, 0, 0, 85, 21, 1, 0, 0, 0, 86, 87, 5, 11, 0, 0, 87, 23, 1, 0, 0, 0, 88, 89, 5, 12, 0, 0, 89, 25, 1, 0, 0, 0, 90, 91, 7, 0, 0, 0, 91, 27, 1, 0, 0, 0, 6, 42, 50, 57, 64, 68, 72]
23 changes: 23 additions & 0 deletions common/hyperscaler/rules/grammar/antlr/RuleParser.tokens
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EQ=1
COMMA=2
LPAREN=3
RPAREN=4
ARROW=5
ASTERIX=6
WS=7
PLAN=8
PR=9
HR=10
S=11
EU=12
VAL=13
'='=1
','=2
'('=3
')'=4
'->'=5
'*'=6
'PR'=9
'HR'=10
'S'=11
'EU'=12
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