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30 lines
1.2 KiB
30 lines
1.2 KiB
{{
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// global (one-time) initializer
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import { scriptFile } from "./ScriptFile";
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import { numberValue } from "./ScriptValue";
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import { versionStatement } from "./TopLevelStatement";
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}}
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{
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// per-parse initializer
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}
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// peggy-loader:startRule ScriptFile
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ScriptFile = statements:TopLevelStatementList { return scriptFile(statements); }
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NewLine "newline" = "\n" { return null; }
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WhiteSpace "whitespace" = [ \r\v\t]+ { return null; }
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LineComment "line comment" = "//" [^\n]* { return null; }
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BlockCommentTail = "*/" / ( "*" !"/" [^*]* BlockCommentTail ) { return null; }
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BlockComment "block comment" = "/*" [^*]* BlockCommentTail { return null; }
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IntegerLiteral "integer literal" = digits:$[0-9]+ { return numberValue(digits); }
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NonToken = (LineComment / BlockComment / WhiteSpace) { return null; }
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_ = (NonToken+) { return null; }
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StatementEnd = _? NewLine { return null; }
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VersionStatement "version statement" = "script" _ "version" _ version:IntegerLiteral { return versionStatement(version.value); }
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TopLevelStatement "top-level statement" = VersionStatement
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TopLevelStatementList = (StatementEnd* _? head:TopLevelStatement tail:(StatementEnd+ _? @TopLevelStatement)* StatementEnd* _? { return [head, ...tail]; }) / (StatementEnd* _? { return []; }) |