48baf056b4
This way, we can keep of the order in which the rules were given, for resolving reduce/reduce conflicts.
35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
#include "tree_sitter/compiler.h"
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namespace tree_sitter {
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namespace examples {
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using namespace tree_sitter::rules;
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Grammar arithmetic() {
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return Grammar({
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{ "expression", choice({
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seq({
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sym("term"),
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sym("plus"),
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sym("term") }),
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sym("term") }) },
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{ "term", choice({
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seq({
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sym("factor"),
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sym("times"),
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sym("factor") }),
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sym("factor") }) },
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{ "factor", choice({
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sym("variable"),
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sym("number"),
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seq({
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str("("),
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err(sym("expression")),
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str(")") }) }) },
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{ "plus", str("+") },
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{ "times", str("*") },
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{ "number", pattern("\\d+") },
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{ "variable", pattern("[a-zA-Z]+") },
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});
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}
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}
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}
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