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Convert into GLR-way of operator parsing

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Kirill Andreev 2020-05-06 16:34:47 +04:00
parent f3c537d2ca
commit 83cc13dd48
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GPG Key ID: CF7DA79DE4785A47
1 changed files with 15 additions and 89 deletions
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100
tools/lsp/pascaligo/grammar.js
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@ -430,7 +430,7 @@ module.exports = grammar({
choice( choice(
$.case_expr, $.case_expr,
$.cond_expr, $.cond_expr,
$.disj_expr, $.op_expr,
$.fun_expr, $.fun_expr,
), ),
@ -473,97 +473,23 @@ module.exports = grammar({
field("else", $._expr), field("else", $._expr),
), ),
disj_expr: $ => op_expr: $ =>
choice( choice(
field("the", $.conj_expr), field("the", $._core_expr),
seq(field("arg1", $.disj_expr), 'or', field("arg2", $.conj_expr)), prec.left (0, seq(field("arg1", $.op_expr), 'or', field("arg2", $.op_expr))),
), prec.left (1, seq(field("arg1", $.op_expr), 'and', field("arg2", $.op_expr))),
prec.right(2, seq(field("arg1", $._core_expr), 'contains', field("arg2", $.op_expr))),
conj_expr: $ => prec.left (3, seq(field("arg1", $.op_expr), $.comparison, field("arg2", $.op_expr))),
choice( prec.right(4, seq(field("arg1", $.op_expr), '^', field("arg2", $.op_expr))),
field("the", $.set_membership), prec.right(5, seq(field("arg1", $.op_expr), '#', field("arg2", $.op_expr))),
seq( prec.left (6, seq(field("arg1", $.op_expr), $.adder, field("arg2", $.op_expr))),
field("arg1", $.conj_expr), prec.left (7, seq(field("arg1", $.op_expr), $.multiplier, field("arg2", $.op_expr))),
'and', prec.right(8, seq(field("negate", $.negate), field("arg", $._core_expr))),
field("arg2", $.set_membership)
),
),
set_membership: $ =>
choice(
field("the", $.comp_expr),
seq(
field("arg1", $._core_expr),
'contains',
field("arg2", $.set_membership)
),
),
comp_expr: $ =>
choice(
field("the", $.cat_expr),
seq(
field("arg1", $.comp_expr),
field("compare", $.comparison),
field("arg2", $.cat_expr),
),
), ),
comparison: $ => choice('<', '<=', '>', '>=', '=', '=/='), comparison: $ => choice('<', '<=', '>', '>=', '=', '=/='),
cat_expr: $ =>
choice(
field("the", $.cons_expr),
seq(
field("arg1", $.cons_expr),
'^',
field("arg2", $.cat_expr),
),
),
cons_expr: $ =>
choice(
field("the", $.add_expr),
seq(
field("arg1", $.add_expr),
'#',
field("arg2", $.cons_expr)
),
),
add_expr: $ =>
choice(
field("the", $.mult_expr),
seq(
field("arg1", $.add_expr),
field("add", $.adder),
field("arg2", $.mult_expr),
),
),
adder: $ => choice('-', '+'), adder: $ => choice('-', '+'),
mult_expr: $ =>
choice(
field("the", $.unary_expr),
seq(
field("arg1", $.mult_expr),
field("multiply", $.multiplier),
field("arg2", $.unary_expr),
),
),
multiplier: $ => choice('/', '*', 'mod'), multiplier: $ => choice('/', '*', 'mod'),
unary_expr: $ =>
choice(
field("the", $._core_expr),
seq(
field("negate", $.negate),
field("arg", $._core_expr),
),
),
negate: $ => choice('-', 'not'), negate: $ => choice('-', 'not'),
_core_expr: $ => _core_expr: $ =>
@ -625,7 +551,7 @@ module.exports = grammar({
annot_expr: $ => annot_expr: $ =>
par(seq( par(seq(
field("subject", $.disj_expr), field("subject", $.op_expr),
':', ':',
field("type", $._type_expr) field("type", $._type_expr)
)), )),