118 lines
2.0 KiB
Plaintext
118 lines
2.0 KiB
Plaintext
@top Program {
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StatementList
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}
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StatementList {
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LBrace Statement* RBrace
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}
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@skip { Whitespace }
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IfStatement {
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If ConditionPart PartIfStatement Else Statement | If ConditionPart Statement
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}
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PartIfStatement {
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If ConditionPart PartIfStatement Else PartIfStatement | NoIfStatement
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}
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ConditionPart {
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LParen Condition RParen
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}
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Condition {
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ConditionalExpression (LogicalOperator ConditionalExpression)*
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}
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ConditionalExpression {
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Expression Operator Expression | Expression
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}
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Expression {
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Term (AddLike Term)*
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}
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Statement {
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IfStatement | NoIfStatement
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}
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NoIfStatement {
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AssignmentStatement Semicolon | VariableDefinition Semicolon | LBrace Statement* RBrace | ConstantDefinition Semicolon | Semicolon
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}
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AssignmentStatement {
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Identifier Equal Expression
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}
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Term {
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Factor (MultiplyLike Factor)*
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}
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ConstantDefinition {
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Const VariableDefinition
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}
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VariableDefinition {
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Type (Identifier | AssignmentStatement) (Comma Identifier | Comma AssignmentStatement)*
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}
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Type {
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Int | Char
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}
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Factor {
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Identifier | Number | Character | LParen Expression RParen
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}
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AddLike {
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Plus | Minus
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}
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MultiplyLike {
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Multiply | Divide | Modulo
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}
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Number {
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UnsignedNumber | Minus UnsignedNumber | Plus UnsignedNumber
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}
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Operator {
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EqualTo | NotEqualTo | LessThan | GreaterThan | LessThanOrEqual | GreaterThanOrEqual
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}
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LogicalOperator {
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And | Or
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}
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@tokens {
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If { "!if" }
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Else { "!else" }
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Int {"!int"}
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Char {"!char"}
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Const { "!const" }
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Plus { "+" }
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Minus { "-" }
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Multiply { "*" }
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Modulo { "%" }
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Divide { "/" }
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LParen { "(" }
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RParen { ")" }
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LBrace { "{" }
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RBrace { "}" }
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Comma { "," }
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Semicolon { ";" }
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Identifier { $[a-zA-Z_]$[a-zA-Z0-9_]* }
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UnsignedNumber { $[0-9]+ }
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String { "\"" $[\x00-\x7F]* "\"" }
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Character { "'" $[\x00-\x7F] "'" }
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EqualTo { "==" }
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NotEqualTo { "!=" }
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LessThan { "<" }
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GreaterThan { ">" }
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LessThanOrEqual { "<=" }
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GreaterThanOrEqual { ">=" }
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Equal { "=" }
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Whitespace { $[\t\n\r]+ }
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And { "&&" }
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Or { "||" }
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} |