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Start work on javascript grammar

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This commit is contained in:
Max Brunsfeld 2014-03-24 09:14:29 -07:00
parent fd226a6bfe
commit 671f1a1ddc
11 changed files with 1695 additions and 10 deletions
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72
examples/grammars/javascript.cc Normal file
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#include "tree_sitter/compiler.h"
namespace tree_sitter {
namespace examples {
using namespace tree_sitter::rules;
static rule_ptr comma_sep(const rule_ptr &element) {
return choice({
seq({
element,
repeat(seq({ str(","), element })),
}),
blank(),
});
}
Grammar javascript() {
return Grammar("program", {
{ "program", repeat(sym("statement")) },
{ "terminator", choice({ str(";"), str("\n") }) },
{ "statement", choice({
sym("if"),
seq({ sym("expression"), _sym("terminator") }),
seq({ sym("assignment"), _sym("terminator") }) }) },
{ "if", seq({
str("if"),
str("("),
sym("expression"),
str(")"),
sym("block")
}) },
{ "block", seq({
str("{"),
repeat(sym("statement")),
str("}")
}) },
{ "assignment", seq({
str("var"),
sym("identifier"),
str("="),
sym("expression") })},
{ "expression", choice({
sym("literal") }) },
{ "literal", choice({
sym("object"),
sym("array"),
sym("string"),
sym("number"),
sym("true"),
sym("false"),
sym("null"), }) },
{ "object", seq({
str("{"),
comma_sep(err(seq({
sym("string"),
str(":"),
sym("expression") }))),
str("}"), }) },
{ "array", seq({
str("["),
comma_sep(err(sym("expression"))),
str("]") }) },
{ "string", pattern("\"([^\"]|\\\\\")+\"") },
{ "identifier", pattern("[\\w_$]+") },
{ "number", pattern("\\d+(.\\d+)?") },
{ "null", str("null") },
{ "true", str("true") },
{ "false", str("false") },
});
}
}
}