pegjs/spec/unit/compiler/passes/generate-bytecode.spec.js
David Majda bdf91b5941 Replace "var" with "let" & "const"
This is purely a mechanical change, not taking advantage of block scope
of "let" and "const". Minimizing variable scope will come in the next
commit.

In general, "var" is converted into "let" and "const" is used only for
immutable variables of permanent character (generally spelled in
ALL_CAPS). Using it for any immutable variable regardless on its
permanence would feel confusing.

Any code which is not transpiled and needs to run in ES6 environment
(examples, code in grammars embedded in specs, ...) is kept unchanged.
This is also true for code generated by PEG.js.

See #442.
2016-09-09 10:44:00 +02:00

653 lines
22 KiB
JavaScript

"use strict";
let peg = require("../../../../lib/peg");
describe("compiler pass |generateBytecode|", function() {
let pass = peg.compiler.passes.generate.generateBytecode;
function bytecodeDetails(bytecode) {
return {
rules: [{ bytecode: bytecode }]
};
}
function constsDetails(consts) { return { consts: consts }; }
describe("for grammar", function() {
it("generates correct bytecode", function() {
expect(pass).toChangeAST([
'a = "a"',
'b = "b"',
'c = "c"'
].join("\n"), {
rules: [
{ bytecode: [18, 0, 2, 2, 22, 0, 23, 1] },
{ bytecode: [18, 2, 2, 2, 22, 2, 23, 3] },
{ bytecode: [18, 4, 2, 2, 22, 4, 23, 5] }
]
});
});
it("defines correct constants", function() {
expect(pass).toChangeAST([
'a = "a"',
'b = "b"',
'c = "c"'
].join("\n"), constsDetails([
'"a"',
'peg$literalExpectation("a", false)',
'"b"',
'peg$literalExpectation("b", false)',
'"c"',
'peg$literalExpectation("c", false)'
]));
});
});
describe("for rule", function() {
it("generates correct bytecode", function() {
expect(pass).toChangeAST('start = "a"', bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1 // <expression>
]));
});
});
describe("for named", function() {
let grammar = 'start "start" = "a"';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
28, // SILENT_FAILS_ON
18, 1, 2, 2, 22, 1, 23, 2, // <expression>
29, // SILENT_FAILS_OFF
14, 2, 0, // IF_ERROR
23, 0 // * FAIL
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'peg$otherExpectation("start")',
'"a"',
'peg$literalExpectation("a", false)'
]));
});
});
describe("for choice", function() {
it("generates correct bytecode", function() {
expect(pass).toChangeAST('start = "a" / "b" / "c"', bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1, // <alternatives[0]>
14, 21, 0, // IF_ERROR
6, // * POP
18, 2, 2, 2, 22, 2, 23, 3, // <alternatives[1]>
14, 9, 0, // IF_ERROR
6, // * POP
18, 4, 2, 2, 22, 4, 23, 5 // <alternatives[2]>
]));
});
});
describe("for action", function() {
describe("without labels", function() {
let grammar = 'start = "a" { code }';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
15, 6, 0, // IF_NOT_ERROR
24, 1, // * LOAD_SAVED_POS
26, 2, 1, 0, // CALL
9 // NIP
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)',
'function() { code }'
]));
});
});
describe("with one label", function() {
let grammar = 'start = a:"a" { code }';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
15, 7, 0, // IF_NOT_ERROR
24, 1, // * LOAD_SAVED_POS
26, 2, 1, 1, 0, // CALL
9 // NIP
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)',
'function(a) { code }'
]));
});
});
describe("with multiple labels", function() {
let grammar = 'start = a:"a" b:"b" c:"c" { code }';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <elements[0]>
15, 40, 3, // IF_NOT_ERROR
18, 2, 2, 2, 22, 2, 23, 3, // * <elements[1]>
15, 25, 4, // IF_NOT_ERROR
18, 4, 2, 2, 22, 4, 23, 5, // * <elements[2]>
15, 10, 4, // IF_NOT_ERROR
24, 3, // * LOAD_SAVED_POS
26, 6, 3, 3, 2, 1, 0, // CALL
9, // NIP
8, 3, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 2, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)',
'"b"',
'peg$literalExpectation("b", false)',
'"c"',
'peg$literalExpectation("c", false)',
'function(a, b, c) { code }'
]));
});
});
});
describe("for sequence", function() {
let grammar = 'start = "a" "b" "c"';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <elements[0]>
15, 33, 3, // IF_NOT_ERROR
18, 2, 2, 2, 22, 2, 23, 3, // * <elements[1]>
15, 18, 4, // IF_NOT_ERROR
18, 4, 2, 2, 22, 4, 23, 5, // * <elements[2]>
15, 3, 4, // IF_NOT_ERROR
11, 3, // * WRAP
9, // NIP
8, 3, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 2, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)',
'"b"',
'peg$literalExpectation("b", false)',
'"c"',
'peg$literalExpectation("c", false)'
]));
});
});
describe("for labeled", function() {
it("generates correct bytecode", function() {
expect(pass).toChangeAST('start = a:"a"', bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1 // <expression>
]));
});
});
describe("for text", function() {
it("generates correct bytecode", function() {
expect(pass).toChangeAST('start = $"a"', bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
15, 2, 1, // IF_NOT_ERROR
6, // * POP
12, // TEXT
9 // * NIP
]));
});
});
describe("for simple_and", function() {
let grammar = 'start = &"a"';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
28, // SILENT_FAILS_ON
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
29, // SILENT_FAILS_OFF
15, 3, 3, // IF_NOT_ERROR
6, // * POP
7, // POP_CURR_POS
1, // PUSH_UNDEFINED
6, // * POP
6, // POP
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)'
]));
});
});
describe("for simple_not", function() {
let grammar = 'start = !"a"';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
28, // SILENT_FAILS_ON
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
29, // SILENT_FAILS_OFF
14, 3, 3, // IF_ERROR
6, // * POP
6, // POP
1, // PUSH_UNDEFINED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)'
]));
});
});
describe("for optional", function() {
let grammar = 'start = "a"?';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
14, 2, 0, // IF_ERROR
6, // * POP
2 // PUSH_NULL
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)'
]));
});
});
describe("for zero_or_more", function() {
let grammar = 'start = "a"*';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
4, // PUSH_EMPTY_ARRAY
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
16, 9, // WHILE_NOT_ERROR
10, // * APPEND
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
6 // POP
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)'
]));
});
});
describe("for one_or_more", function() {
let grammar = 'start = "a"+';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
4, // PUSH_EMPTY_ARRAY
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
15, 12, 3, // IF_NOT_ERROR
16, 9, // * WHILE_NOT_ERROR
10, // * APPEND
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
6, // POP
6, // * POP
6, // POP
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)'
]));
});
});
describe("for group", function() {
it("generates correct bytecode", function() {
expect(pass).toChangeAST('start = ("a")', bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1 // <expression>
]));
});
});
describe("for semantic_and", function() {
describe("without labels", function() {
let grammar = 'start = &{ code }';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
25, // UPDATE_SAVED_POS
26, 0, 0, 0, // CALL
13, 2, 2, // IF
6, // * POP
1, // PUSH_UNDEFINED
6, // * POP
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(
grammar,
constsDetails(['function() { code }'])
);
});
});
describe("with labels", function() {
let grammar = 'start = a:"a" b:"b" c:"c" &{ code }';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <elements[0]>
15, 55, 3, // IF_NOT_ERROR
18, 2, 2, 2, 22, 2, 23, 3, // * <elements[1]>
15, 40, 4, // IF_NOT_ERROR
18, 4, 2, 2, 22, 4, 23, 5, // * <elements[2]>
15, 25, 4, // IF_NOT_ERROR
25, // * UPDATE_SAVED_POS
26, 6, 0, 3, 2, 1, 0, // CALL
13, 2, 2, // IF
6, // * POP
1, // PUSH_UNDEFINED
6, // * POP
3, // PUSH_FAILED
15, 3, 4, // IF_NOT_ERROR
11, 4, // * WRAP
9, // NIP
8, 4, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 3, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 2, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)',
'"b"',
'peg$literalExpectation("b", false)',
'"c"',
'peg$literalExpectation("c", false)',
'function(a, b, c) { code }'
]));
});
});
});
describe("for semantic_not", function() {
describe("without labels", function() {
let grammar = 'start = !{ code }';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
25, // UPDATE_SAVED_POS
26, 0, 0, 0, // CALL
13, 2, 2, // IF
6, // * POP
3, // PUSH_FAILED
6, // * POP
1 // PUSH_UNDEFINED
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(
grammar,
constsDetails(['function() { code }'])
);
});
});
describe("with labels", function() {
let grammar = 'start = a:"a" b:"b" c:"c" !{ code }';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <elements[0]>
15, 55, 3, // IF_NOT_ERROR
18, 2, 2, 2, 22, 2, 23, 3, // * <elements[1]>
15, 40, 4, // IF_NOT_ERROR
18, 4, 2, 2, 22, 4, 23, 5, // * <elements[2]>
15, 25, 4, // IF_NOT_ERROR
25, // * UPDATE_SAVED_POS
26, 6, 0, 3, 2, 1, 0, // CALL
13, 2, 2, // IF
6, // * POP
3, // PUSH_FAILED
6, // * POP
1, // PUSH_UNDEFINED
15, 3, 4, // IF_NOT_ERROR
11, 4, // * WRAP
9, // NIP
8, 4, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 3, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 2, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)',
'"b"',
'peg$literalExpectation("b", false)',
'"c"',
'peg$literalExpectation("c", false)',
'function(a, b, c) { code }'
]));
});
});
});
describe("for rule_ref", function() {
it("generates correct bytecode", function() {
expect(pass).toChangeAST([
'start = other',
'other = "other"'
].join("\n"), {
rules: [
{
bytecode: [27, 1] // RULE
},
{ }
]
});
});
});
describe("for literal", function() {
describe("empty", function() {
let grammar = 'start = ""';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
0, 0 // PUSH
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails(['""']));
});
});
describe("non-empty case-sensitive", function() {
let grammar = 'start = "a"';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
18, 0, 2, 2, // MATCH_STRING
22, 0, // * ACCEPT_STRING
23, 1 // * FAIL
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("a", false)'
]));
});
});
describe("non-empty case-insensitive", function() {
let grammar = 'start = "A"i';
it("generates correct bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
19, 0, 2, 2, // MATCH_STRING_IC
21, 1, // * ACCEPT_N
23, 1 // * FAIL
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(grammar, constsDetails([
'"a"',
'peg$literalExpectation("A", true)'
]));
});
});
});
describe("for class", function() {
it("generates correct bytecode", function() {
expect(pass).toChangeAST('start = [a]', bytecodeDetails([
20, 0, 2, 2, // MATCH_REGEXP
21, 1, // * ACCEPT_N
23, 1 // * FAIL
]));
});
describe("non-inverted case-sensitive", function() {
it("defines correct constants", function() {
expect(pass).toChangeAST('start = [a]', constsDetails([
'/^[a]/',
'peg$classExpectation(["a"], false, false)'
]));
});
});
describe("inverted case-sensitive", function() {
it("defines correct constants", function() {
expect(pass).toChangeAST('start = [^a]', constsDetails([
'/^[^a]/',
'peg$classExpectation(["a"], true, false)'
]));
});
});
describe("non-inverted case-insensitive", function() {
it("defines correct constants", function() {
expect(pass).toChangeAST('start = [a]i', constsDetails([
'/^[a]/i',
'peg$classExpectation(["a"], false, true)'
]));
});
});
describe("complex", function() {
it("defines correct constants", function() {
expect(pass).toChangeAST('start = [ab-def-hij-l]', constsDetails([
'/^[ab-def-hij-l]/',
'peg$classExpectation(["a", ["b", "d"], "e", ["f", "h"], "i", ["j", "l"]], false, false)'
]));
});
});
});
describe("for any", function() {
let grammar = 'start = .';
it("generates bytecode", function() {
expect(pass).toChangeAST(grammar, bytecodeDetails([
17, 2, 2, // MATCH_ANY
21, 1, // * ACCEPT_N
23, 0 // * FAIL
]));
});
it("defines correct constants", function() {
expect(pass).toChangeAST(
grammar,
constsDetails(['peg$anyExpectation()'])
);
});
});
});