Emacs Mode

Note

This is a stub.

Keybindings

Commands working with types can be prefixed with C-u to compute type without further normalisation and with C-u C-u to compute normalised types.

Global commands

C-c C-l	Load file
C-c C-x C-c	Compile file
C-c C-x C-q	Quit, kill the Agda process
C-c C-x C-r	Kill and restart the Agda process
C-c C-x C-d	Remove goals and highlighting (deactivate)
C-c C-x C-h	Toggle display of hidden arguments
C-c C-=	Show constraints
C-c C-s	Solve constraints
C-c C-?	Show all goals
C-c C-f	Move to next goal (forward)
C-c C-b	Move to previous goal (backwards)
C-c C-d	Infer (deduce) type
C-c C-o	Module contents
C-c C-z	Search through definitions in scope
C-c C-n	Compute normal form
C-u C-c C-n	Compute normal form, ignoring abstract
C-u C-u C-c C-n	Compute and print normal form of show <expression>
C-c C-x M-;	Comment/uncomment rest of buffer
C-c C-x C-s	Switch to a different Agda version

Commands in context of a goal

Commands expecting input (for example which variable to case split) will either use the text inside the goal or ask the user for input.

C-c C-SPC	Give (fill goal)
C-c C-r	Refine. Partial give: makes new holes for missing arguments
C-c C-a	Automatic Proof Search (Auto)
C-c C-c	Case split
C-c C-h	Compute type of helper function and add type signature to kill ring (clipboard)
C-c C-t	Goal type
C-c C-e	Context (environment)
C-c C-d	Infer (deduce) type
C-c C-,	Goal type and context
C-c C-.	Goal type, context and inferred type
C-c C-o	Module contents
C-c C-n	Compute normal form
C-u C-c C-n	Compute normal form, ignoring abstract
C-u C-u C-c C-n	Compute and print normal form of show <expression>

Other commands

TAB	Indent current line, cycles between points
S-TAB	Indent current line, cycles in opposite direction
M-.	Go to definition of identifier under point
Middle mouse button	Go to definition of identifier clicked on
M-*	Go back (Emacs < 25.1)
M-,	Go back (Emacs ≥ 25.1)

Unicode input

The Agda emacs mode comes with an input method for for easily writing Unicode characters. Most Unicode character can be input by typing their corresponding TeX or LaTeX commands, eg. typing \lambda will input λ. To see all characters you can input using the Agda input method see M-x describe-input-method Agda.

If you know the Unicode name of a character you can input it using M-x ucs-insert or C-x 8 RET. Example: C-x 8 RET not SPACE a SPACE sub TAB RET to insert “NOT A SUBSET OF” ⊄.

To find out how to input a specific character, eg from the standard library, position the cursor over the character and use M-x describe-char or C-u C-x =.

The Agda input method can be customised via M-x customize-group agda-input.

Common characters

Many common characters have a shorter input sequence than the corresponding TeX command:

• Arrows: \r- for →. You can replace r with another direction: u, d, l. Eg. \d- for ↓. Replace - with = or == to get a double and triple arrows.
• Greek letters can be input by \G followed by the first character of the letters Latin name. Eg. \Gl will input λ while \GL will input Λ.
• Negation: you can get the negated form of many characters by appending n to the name. Eg. while \ni inputs ∋, \nin will input ∌.
• Subscript and superscript: you can input subscript or superscript forms by prepending the character with \_ (subscript) or \^ (superscript). Note that not all characters have a subscript or superscript counterpart in Unicode.

Some characters which were used in this documentation or which are commonly used in the standard library (sorted by hexadecimal code):

Hex code	Character	Short key-binding	TeX command
00ac	¬		\neg
00d7	×	\x	\times
02e2	ˢ	\^s
03bb	λ	\Gl	\lambda
041f	П
0432	в
0435	е
0438	и
043c	м
0440	р
0442	т
1d62	ᵢ	\_i
2032	′	\'1	\prime
207f	ⁿ	\^n
2081	₁	\_1
2082	₂	\_2
2083	₃	\_3
2084	₄	\_4
2096	ₖ	\_k
2098	ₘ	\_m
2099	ₙ	\_n

Hex code	Character	Short key-binding	TeX command
2113	ℓ (PDF TODO)		\ell

Hex code	Character	Short key-binding	TeX command
2115	ℕ	\bN	\Bbb{N}
2192	→	\r-	\to
21a6	↦	\r-|	\mapsto
2200	∀	\all	\forall
2208	∈		\in
220b	∋		\ni
220c	∌	\nin
2218	∘	\o	\circ
2237	∷	\::
223c	∼	\~	\sim
2248	≈	\~~	\approx
2261	≡	\==	\equiv
2264	≤	\<=	\le
2284	⊄	\subn
2294	⊔	\lub
22a2	⊢	\|-	\vdash
22a4	⊤		\top
22a5	⊥		\bot
266d	♭	\b
266f	♯	\#
27e8	⟨	\<
27e9	⟩	\>

Hex code	Character	Short key-binding	TeX command
2983	⦃ (PDF TODO)	\{{
2984	⦄ (PDF TODO)	\}}

Hex code	Character	Short key-binding	TeX command
2c7c	ⱼ	\_j