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Add while statements

This commit is contained in:
Max Brunsfeld 2017-07-14 16:11:35 -07:00
parent dc84753599
commit cce4a65d33
6 changed files with 2484 additions and 1841 deletions
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125
corpus/commands.txt
View File

@ -7,7 +7,7 @@ whoami
---
(program
(command (simple_command (command_name))))
(command (command_name)))
===============================
Commands with arguments
@ -19,8 +19,8 @@ cat -n file1.txt file2.txt
---
(program
(command (simple_command (command_name) (argument)))
(command (simple_command (command_name) (argument) (argument) (argument))))
(command (command_name) (argument))
(command (command_name) (argument) (argument) (argument)))
===================================
Commands with environment variables
@ -32,15 +32,15 @@ VAR1=a VAR2="ok" git diff --word-diff=color
---
(program
(command (simple_command
(command
(environment_variable_assignment (variable_name) (argument))
(command_name)))
(command (simple_command
(command_name))
(command
(environment_variable_assignment (variable_name) (argument))
(environment_variable_assignment (variable_name) (argument))
(command_name)
(argument)
(argument))))
(argument)))
===================================
Pipelines
@ -52,31 +52,32 @@ cat foo | grep -v bar
---
(program
(command (pipeline
(simple_command (command_name))
(simple_command (command_name))))
(command (pipeline
(simple_command (command_name) (argument))
(simple_command (command_name) (argument) (argument)))))
(pipeline
(command (command_name))
(command (command_name)))
(pipeline
(command (command_name) (argument))
(command (command_name) (argument) (argument))))
===================================
Lists
===================================
a | b && c; d e f | e g
a | b && c && d; d e f || e g
---
(program
(command (list
(list
(list
(pipeline
(simple_command (command_name))
(simple_command (command_name)))
(simple_command (command_name)))
(pipeline
(simple_command (command_name) (argument) (argument))
(simple_command (command_name) (argument))))))
(command (command_name))
(command (command_name)))
(command (command_name)))
(command (command_name)))
(list
(command (command_name) (argument) (argument))
(command (command_name) (argument))))
===============================
File redirects
@ -89,17 +90,45 @@ cat a b 2> /dev/null
---
(program
(command (simple_command
(command
(command_name)
(file_redirect (file_name))))
(command (simple_command
(file_redirect (file_name)))
(command
(command_name)
(argument)
(argument)
(file_redirect (file_descriptor) (file_name))))
(command (simple_command
(file_redirect (file_descriptor) (file_name)))
(command
(file_redirect (file_descriptor) (file_descriptor))
(command_name))))
(command_name)))
===============================
Variable expansions
===============================
cat $FOO
---
(program
(command
(command_name)
(expansion (variable_name))))
===============================
Variable expansion operators
===============================
cat ${BAR} ${ABC=def} ${GHI:?jkl}
---
(program
(command
(command_name)
(operator_expansion (variable_name))
(operator_expansion (variable_name) (argument))
(operator_expansion (variable_name) (argument))))
===============================
Heredoc redirects
@ -116,13 +145,13 @@ JS
---
(program
(command (simple_command
(command
(command_name)
(heredoc_redirect (heredoc))))
(command (simple_command
(heredoc_redirect (heredoc)))
(command
(command_name)
(argument)
(heredoc_redirect (heredoc)))))
(heredoc_redirect (heredoc))))
===============================
Heredocs with variables
@ -137,37 +166,9 @@ exit
---
(program
(command (simple_command
(command
(command_name)
(heredoc_redirect (heredoc
(expansion (variable_name))
(operator_expansion (variable_name))))))
(command (simple_command (command_name))))
===============================
Variable expansions
===============================
cat $FOO
---
(program
(command (simple_command
(command_name)
(expansion (variable_name)))))
===============================
Variable expansion operators
===============================
cat ${BAR} ${ABC=def} ${GHI:?jkl}
---
(program
(command (simple_command
(command_name)
(operator_expansion (variable_name))
(operator_expansion (variable_name) (argument))
(operator_expansion (variable_name) (argument)))))
(operator_expansion (variable_name)))))
(command (command_name)))

17
corpus/control_flow.txt Normal file
View File

@ -0,0 +1,17 @@
====================================
While statements
====================================
while something happens; do
echo a
echo b
done
---
(program
(while_statement
(command (command_name) (argument))
(do_group
(command (command_name) (argument))
(command (command_name) (argument)))))

8
corpus/programs.txt
View File

@ -27,11 +27,11 @@ f=g \
---
(program
(command (simple_command
(command
(command_name)
(argument)
(argument)))
(command (simple_command
(argument))
(command
(environment_variable_assignment
(variable_name)
(argument))
@ -39,4 +39,4 @@ f=g \
(variable_name)
(argument))
(command_name)
(argument))))
(argument)))

55
grammar.js
View File

@ -1,7 +1,7 @@
module.exports = grammar({
name: 'bash',
inline: $ => [$.control_operator],
inline: $ => [$.statement],
externals: $ => [
$._simple_heredoc,
@ -16,18 +16,33 @@ module.exports = grammar({
],
rules: {
program: $ => repeat($.command),
program: $ => repeat($._terminated_statement),
command: $ => seq(
choice(
$.simple_command,
_terminated_statement: $ => seq(
$.statement,
choice(';', ';;', '\n')
),
statement: $ => choice(
$.command,
$.while_statement,
$.pipeline,
$.list
),
$.control_operator
while_statement: $ => seq(
'while',
$._terminated_statement,
$.do_group
),
simple_command: $ => seq(
do_group: $ => seq(
'do',
repeat($._terminated_statement),
'done'
),
command: $ => seq(
repeat(choice(
$.environment_variable_assignment,
$.file_redirect
@ -47,23 +62,16 @@ module.exports = grammar({
))
),
pipeline: $ => prec.left(seq(
$.simple_command,
pipeline: $ => prec.left(1, seq(
$.statement,
choice('|', '|&'),
$.simple_command
$.statement
)),
list: $ => prec.left(seq(
choice(
$.simple_command,
$.list,
$.pipeline
),
choice('&&', ';'),
choice(
$.simple_command,
$.pipeline
)
$.statement,
choice('&&', '||'),
$.statement
)),
environment_variable_assignment: $ => seq(
@ -118,12 +126,7 @@ module.exports = grammar({
leading_word: $ => /[^\\\s#=|;:{}]+/,
word: $ => /[^#\\\s$<>{}&]+/,
control_operator: $ => choice(
'\n',
';;'
),
word: $ => /[^#\\\s$<>{}&;]+/,
comment: $ => /#.*/,
}

119
src/grammar.json
View File

@ -5,18 +5,45 @@
"type": "REPEAT",
"content": {
"type": "SYMBOL",
"name": "command"
"name": "_terminated_statement"
}
},
"command": {
"_terminated_statement": {
"type": "SEQ",
"members": [
{
"type": "SYMBOL",
"name": "statement"
},
{
"type": "CHOICE",
"members": [
{
"type": "STRING",
"value": ";"
},
{
"type": "STRING",
"value": ";;"
},
{
"type": "STRING",
"value": "\n"
}
]
}
]
},
"statement": {
"type": "CHOICE",
"members": [
{
"type": "SYMBOL",
"name": "simple_command"
"name": "command"
},
{
"type": "SYMBOL",
"name": "while_statement"
},
{
"type": "SYMBOL",
@ -28,13 +55,44 @@
}
]
},
"while_statement": {
"type": "SEQ",
"members": [
{
"type": "STRING",
"value": "while"
},
{
"type": "SYMBOL",
"name": "control_operator"
"name": "_terminated_statement"
},
{
"type": "SYMBOL",
"name": "do_group"
}
]
},
"simple_command": {
"do_group": {
"type": "SEQ",
"members": [
{
"type": "STRING",
"value": "do"
},
{
"type": "REPEAT",
"content": {
"type": "SYMBOL",
"name": "_terminated_statement"
}
},
{
"type": "STRING",
"value": "done"
}
]
},
"command": {
"type": "SEQ",
"members": [
{
@ -122,13 +180,13 @@
},
"pipeline": {
"type": "PREC_LEFT",
"value": 0,
"value": 1,
"content": {
"type": "SEQ",
"members": [
{
"type": "SYMBOL",
"name": "simple_command"
"name": "statement"
},
{
"type": "CHOICE",
@ -145,7 +203,7 @@
},
{
"type": "SYMBOL",
"name": "simple_command"
"name": "statement"
}
]
}
@ -155,23 +213,10 @@
"value": 0,
"content": {
"type": "SEQ",
"members": [
{
"type": "CHOICE",
"members": [
{
"type": "SYMBOL",
"name": "simple_command"
},
{
"type": "SYMBOL",
"name": "list"
},
{
"type": "SYMBOL",
"name": "pipeline"
}
]
"name": "statement"
},
{
"type": "CHOICE",
@ -182,22 +227,13 @@
},
{
"type": "STRING",
"value": ";"
"value": "||"
}
]
},
{
"type": "CHOICE",
"members": [
{
"type": "SYMBOL",
"name": "simple_command"
},
{
"type": "SYMBOL",
"name": "pipeline"
}
]
"name": "statement"
}
]
}
@ -439,20 +475,7 @@
},
"word": {
"type": "PATTERN",
"value": "[^#\\\\\\s$<>{}&]+"
},
"control_operator": {
"type": "CHOICE",
"members": [
{
"type": "STRING",
"value": "\n"
},
{
"type": "STRING",
"value": ";;"
}
]
"value": "[^#\\\\\\s$<>{}&;]+"
},
"comment": {
"type": "PATTERN",
@ -501,6 +524,6 @@
}
],
"inline": [
"control_operator"
"statement"
]
}

3975
src/parser.c
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